Answer:
5/4 or 1 1/4 or 1.25
Step-by-step explanation:
There are about 3×1011 stars in our galaxy and about 100 billion galaxies in the observable universe. Suppose every galaxy has as many stars as ours. How many stars are in the observable universe? Write in scientific notation.
The number of stars in the observable universe is; 3.033 × 10¹⁴
Since there are about 3 × 1011 stars in our galaxy; we can rewrite that to be;
3033 stars or3033 stars or3.033 × 10³ stars in our galaxy.However, there are about 100 billion galaxies in the observable universe.
We can rewrite that in scientific notation form so that we have;
100 × 10⁹ or 100 × 10⁹ or 10¹¹ galaxies in the observable universe.Ultimately, since our galaxy is one of the 10¹¹ observable galaxies in the universe; the number of stars in the observable universe is;
3.033 × 10³ × 10¹¹By the laws of indices;
3.033 × 10¹⁴.Therefore, the number of stars in the observable universe is; 3.033 × 10¹⁴.
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A child shot a toy rocket into the air from their playhouse which stood 5 ft above the ground. The rocket rose to 50 ft above the ground and landed on the ground 3.4 seconds later. The path of the toy rocket could be modeled by a quadratic function, , where h is the height of the toy rocket in feet after t seconds. ⦁ What is the practical domain of the function? ⦁ What is the practical range of the function? ⦁ How would the theoretical domain and range of the function differ from the practical domain and range of the situation?
Answer:
a. 0 ≤ t ≤ 3.4 s. b. 0 ≤ y ≤ 50 ft. c. i. -∞ ≤ t ≤ +∞. ii. -∞ ≤ y ≤ 50
Step-by-step explanation:
a. What is the practical domain of the function?
Since the toy rocket lands on the ground 3.4 seconds later, if the time it starts to fly in the air is time t = 0 and the time it lands is time t = 3.4 s, the practical domain of the function is 0 ≤ t ≤ 3.4 s.
b. What is the practical range of the function?
Since the rocket reaches a maximum height of 50 ft, if the maximum height of the toy rocket is y = 50 ft and it lands on the ground at y = 0, the practical range of the function is 0 ≤ y ≤ 50 ft.
c. How would the theoretical domain and range of the function differ from the practical domain and range of the situation?
i. The theoretical values of t is from is from t = -∞ to t = +∞. So, the theoretical domain is -∞ ≤ t ≤ +∞.
ii. Since the maximum value of the function is y = 50, and it also decreases to y = -∞. So, the theoretical domain is from y = -∞ to y = 50. So, the theoretical range is -∞ ≤ y ≤ 50
A record store was selling 3 used CD's for $12.51.
Online you
could buy 5 used CD's for $20.70.
Which place has a lower unit price?
Answer:
Answer: Online
Step-by-step explanation:
Find the unit price
(multiply 12.51 and 20.70 by 100 to make it easier to divide)
12.51 divided by 3 = 417
20.70 divided by 5 = 414
Hope this helps!
Shelia has 6 rings in a bag. There are 2 gold rings, 3 silver rings, and 1 plastic ring. Without looking, she picks one ring out of the bag and places it on her table. She then picks a second ring from the bag. What is the probability that the first ring is gold and the second ring is gold?
Answer:
the probability is 1/6. the probability for gold is 2/6
Step-by-step explanation:
2 gold rings and 4 other rings
Answer:
the probability of the first ring will be gold cause it's the second most one and your second probability will most likely be the silver because it has more than the other rings
Step-by-step explanation:
Simplify
Rewrite the expression in the form z^n
z^5•z^6= ______
Answer:
z²^30
Step-by-step explanation:
This is it enjoy.
x^3 - 8x^2 + 9x - 5/ x-3
Select all terms that are like terms 5 yx2 -8 x2 1.25 x2 1/2 x2 -3.4 x3 4 x 5 3/8
Order -6 1/4, -6.35, -6 1/5, and 6.1 from greatest to least. Explain.
A contractor purchases ceramic tile to remodel a kitchen floor. Each tile cost $4 and the adhesive/grouting material costs $17.82. If the contractor pays a total of $545.82 how many ceramic tiles did the contractor purchase
Answer:
132 tiles
Step-by-step explanation:
Each tile cost $4
The adhesive/grouting material costs $17.82.
If the contractor pays a total of $545.82
Let the number of tiles be represented as x
The equation is represented as:
$17.82 + $4 × x = $545.82
17.82 + 4x = 545.82
Collect like terms
4x = 545.82 - 17.82
4x = 528
Divide bother sides by 4
4x/4 = 528/4
x = 132
The number of ceramic tiles the contractor bought = 132 tiles
please help me understand this!! TRIG
Answer:
EG ≈ 6
Step-by-step explanation:
sin∅ = opposite over hypotenuse
Since we have a right triangle, we can use trig to solve for the missing values:
∅ = 49°
GE = unknown
FE (hypotenuse) = 8
sin49° = x/8
x = 8sin49°
x = 6.03768
x ≈ 6
EG ≈ 6
The cost of Kerri’s meal was $10. If she wants to leave a 15% tip, how much should she leave? Use the percent proportion to help you ( part/whole = percent/100).
What must be the value of x so that lines a and b are parallel lines cut by transversal f?
10
20
22
32
Answer:
22
Step-by-step explanation:
96° = (6x - 36)° (alternate exterior angles theorem)
Solve for x using the equation.
96 = 6x - 36
Add 36 to each side
96 + 36 = 6x - 36 + 36
132 = 6x
Divide both sides by 6
132/6 = 6x/6
22 = x
x = 22
Answer:22
Step-by-step explanation: took it on edge also f edge2020
BRAINLIEST AND 100 POINTS!!!
There is no science place so i put as math
What energy transformation occurs when a car stereo is turned on?
Chemical to electrical to sound
Chemical to sound to electrical
Electrical to sound to chemical
Electrical to chemical to sound
Question 2(Multiple Choice Worth 4 points)
(01.03 LC)
Which of the following has mechanical energy?
Battery
Burger bun
Stretched band
Visible light
Question 3(Multiple Choice Worth 4 points)
(01.03 MC)
An energy transformation flow diagram is shown.
A flow diagram beginning with an X. An arrow goes from the X to a music player with headphones. Another arrow goes from the music player to the words Sound Energy.
What type of energy does X most likely represent?
X = mechanical energy
X = gravitational energy
X = chemical energy
X = thermal energy
Question 4(Multiple Choice Worth 4 points)
(01.03 LC)
What type of energy is present inside the nucleus of an atom?
Thermal energy
Electrical energy
Nuclear energy
Radiant energy
Question 5(Multiple Choice Worth 4 points)
(01.02 LC)
In the classification of living organisms, which of the following is an example of a domain?
Animalia
Bacteria
Fungi
Protista
Question 6(Multiple Choice Worth 4 points)
(01.03 MC)
What best describes the dropping height of a ball that bounced back up to a height of 45 centimeters?
Less than 45 centimeters, as the ball transforms some of its thermal energy into potential energy
Greater than 45 centimeters, as the ball transforms some of its thermal energy into potential energy
Less than 45 centimeters, as the ball transforms some of its potential energy into thermal energy and sound energy
Greater than 45 centimeters, as the ball transforms some of its potential energy into thermal energy and sound energy
Question 7(Multiple Choice Worth 4 points)
(01.01 MC)
The table shows the commonly eaten foods of some groups of organisms.
Commonly Eaten Foods ListGroup Commonly Eaten Foods
A squids, crabs, lobsters
B branches, barks, twigs, roots
C insects, leaves, nuts, bird eggs
D vegetables, fish, grains, fruits
Which groups contain both primary and secondary consumers?
A and B
B and C
C and D
B and D
Question 8(Multiple Choice Worth 4 points)
(01.02 MC)
According to the Linnaean taxonomy, which highest-ranking taxa would a multicellular organism belong to when it has a nucleus, specialized cells, and a cell wall, but does not have the ability to make its own food?
Fungi
Plantae
Eubacteria
Archaebacteria
Question 9(Multiple Choice Worth 4 points)
(01.05 MC)
Meg has two glasses of grape juice. Glass A has 80 grams of juice at 30 °C. Glass B has 80 grams of juice at 50 °C.
Which of the following steps will make the kinetic energy of the molecules of the juice in both glasses equal?
Decrease the temperature of juice in Glass A by 20 °C
Increase the temperature of juice in Glass A by 20 °C
Decrease the temperature of juice in Glass B by 30 °C
Increase the temperature of juice in Glass B by 30 °C
Question 10(Multiple Choice Worth 4 points)
(01.04 MC)
What is the most likely evidence of an energy transformation taking place when a skater glides over ice?
Skating blades become cold as kinetic energy is transformed into thermal energy
Skating blades become cold as kinetic energy is transformed into gravitational energy
Small tracks of water are left on the ice as kinetic energy is transformed into thermal energy
Small tracks of water are left on the ice as kinetic energy is transformed into gravitational energy
Question 11(Multiple Choice Worth 4 points)
(01.05 MC)
Maya has four glasses of milk. The temperature and the amount of milk in each glass are shown:
Glass A: 20 grams of milk at 10 °C
Glass B: 50 grams of milk at 80 °C
Glass C: 20 grams of milk at 50 °C
Glass D: 50 grams of milk at 80 °C
Which statement is correct?
The molecules of milk in Glass A have less kinetic energy than the molecules of milk in Glass C.
The molecules of milk in Glass B have greater kinetic energy than the molecules of milk in Glass D.
The molecules of milk in Glass C have the same kinetic energy as the molecules of milk in Glass A.
The molecules of milk in Glass B have less kinetic energy than the molecules of milk in Glass D.
Question 12(Multiple Choice Worth 4 points)
(01.02 LC)
Which kingdom does a multicellular living organism most likely belong to?
Archaea
Bacteria
Eubacteria
Fungi
Answer:
2. battery
3. mechanical energy
4. Nuclear energy
5. Animalia
6. Greater than 45 centimeters, as the ball transforms some of its potential energy into thermal energy and sound energy
7. C and D
8. Archaebacteria
9. Increase the temperature of juice in Glass A by 20 °C
10. Skating blades become cold as kinetic energy is transformed into thermal energy
11. The molecules of milk in Glass A have less kinetic energy than the molecules of milk in Glass C.
12. Fungi
Step-by-step explanation:
Hope this helps!
Helpppppppp me plzzzz
Answer:
x = 10°
Step-by-step explanation:
(5x + 2) + 38 = 90
5x + 2 = 90 - 38
5x = 52 - 2
5x = 50
x = 50 ÷ 5
x = 10°
Choose 2 numbers whose sum is 5.7
Answer:
3.3 + 2.4
Step-by-step explanation:
3.3 + 2.4=5.7
Answer:
I am not sure if this is right but I will give it a go.
My answer is 2.9 + 2.8 = 5.7
Step-by-step explanation:
PLEASE HELP ASAP marking brainliest ⚠️⚠️
Use the equation to complete the table
y=2x+5
**The last number is 2
Answer:
1st blank : 1
2nd : 3
3rd : 5
4th: 7
Step-by-step explanation:
you have to replace x in the equatoin by the numbers you have in the first line.
For example : y= 2x+5
y= 2(-2) + 5
y= -4+5
y= 1
hi please answer ASAP worth 25 points! :P
Factor completely over the set of complex numbers using the factoring pattern.
25m^2 + 36
Answer:
(5m + 6) • (5m - 6)
Step-by-step explanation:
STEP1:Equation at the end of step 1 52m2 - 36 STEP2:Trying to factor as a Difference of Squares
2.1 Factoring: 25m2-36
Theory : A difference of two perfect squares, A2 - B2 can be factored into (A+B) • (A-B)
Proof : (A+B) • (A-B) =
A2 - AB + BA - B2 =
A2 - AB + AB - B2 =
A2 - B2
Note : AB = BA is the commutative property of multiplication.
Note : - AB + AB equals zero and is therefore eliminated from the expression.
Check : 25 is the square of 5
Check : 36 is the square of 6
Check : m2 is the square of m1
Factorization is : (5m + 6) • (5m - 6)
Final result :
(5m + 6) • (5m - 6)
A computer software retailer used a markup rate of 40%. Find the selling price of a computer game that cost the retailer $25.
Answer:
$35
Step-by-step explanation:
25 x 1.4 = 35
find the inverse of y=4-x/x
Answer:
[tex]f^{-1} (x)[/tex]=[tex]\frac{4}{1+x}[/tex]
Step-by-step explanation:
The first step is to switch y for x and x for y so the equation will look like
x=[tex]\frac{4-y}{y}[/tex]
the next thing you do is isolate y so you have to multiply y to both sides to get
[tex]xy=4-y[/tex] now you got to add y to both sides which would get you
xy+y=4
since xy and y share a y value you have to try and factor out y which would get you
y(x+1)=4
the final step is to divide x+1 on both sides
y[tex]\frac{(x+1)}{x+1}[/tex]=[tex]\frac{4}{x+1}[/tex]
which since x+1 and x+1 crosses each other out we are left with
y=[tex]\frac{4}{1+x}[/tex]
A sprinter on the track team ran the 100 meter dash and redcorded the time for each race. The race times (in seconds) were:
12.4 13.1 12.7 12.8 13.0 12.9 13.1 13.5
Answer:
What is the question please post the full question next time
Solve for a in the proportion.
a water station is located at the midpoint of ab at what marker on the path is the water station located?
Answer: Halfway between A and B.
Giving Brainliest to the first answer that's correct!!!
Triangle X Y Z is shown. Angle Z W X is a right angle. An altitude is drawn from point W to point Y on side Z X to form a right angle. The length of W Y is 4, the length of Y X is a, the length of Z Y is 3, the length of Z W is c, and the length of W X is b.
What is the value of a?
A.) 5 units
B.) 5 and one-third units
C.) 6 and two-thirds units
D.) 7 units
Answer:
B
Step-by-step explanation:
I think its B but dont trust my math lol xd
Answer:
B
Step-by-step explanation:
5 and one-third units
The area of a parallelogram is 42 square inches. The base of the parallelogram is 6 inches. What is the height of the parallelogram? EXPLAIN how you can use the formula for the area of a parallelogram to solve the problem.
Answer:
7
Step-by-step explanation:
to find an area of a parallelogram, you have to multiply the width by height. to do the opposite, simply divide 42 to 6 to get 7
Keith needs to drive a total of 18 miles. So far, he has driven 9.4 miles. How many more miles must Keith drive?
Simplify:
A.
B.
C.
D.
Answer:
C
Step-by-step explanation:
The absolute value function always gives a positive result, that is
| - a | = | a | = a
Given
[tex]\frac{|-12-3|}{4}[/tex] - [tex]\frac{|23-42|}{8}[/tex]
= [tex]\frac{|-15|}{4}[/tex] - [tex]\frac{|-19|}{8}[/tex]
= [tex]\frac{15}{4}[/tex] - [tex]\frac{19}{8}[/tex]
= [tex]\frac{15(2)}{4(2)}[/tex] - [tex]\frac{19}{8}[/tex]
= [tex]\frac{30}{8}[/tex] - [tex]\frac{19}{8}[/tex]
= [tex]\frac{30-19}{8}[/tex]
= [tex]\frac{11}{8}[/tex] → C
The simplification of the given equation is 11/8. thus option /c is correct.
What is a function?Function is a type of relation, or rule, that maps one input to specific single output. An equation is an expression that shows the relationship between two or more numbers and variables.
The absolute value function always gives a positive result, which is;
| - a | = | a | = a
Given that | 12 - 3 |/4 - | 23 -42 | /8
| 12 - 3 |/4 - | 23 -42 | /8
| 15 |/4 - | -19 | /8
= 15/4 - 19/8
= 30/8 - 19/8
= 11/8
Therefore, the simplification of the given equation is 11/8. thus option /c is correct.
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Which table of values represents the equation Cost = Number of toppings x 2 + 3 *
Determine the slope-intercept form of the equation of the line parallel to y = -x + 11 that passes through the point( -6, 2)
y =blank x + blank
Answer:(4,-3); 2x-7y=14
Step-by-step explanation:
Jason bought a soft drink for 3 dollars and 4 candy bars he spent a total of 11 dollars. How much did each candy bar cost
Answer:
2$
Step-by-step explanation:
Answer:
2 dollars each
Step-by-step explanation:
11-3=8, 8 divided by 4 bars is 2. Therefore, the answer is 2 dollars each.
Hi! I really suck at math so please help :)
Answer:
(-2,-4), (-1, -1), (0,2), (1,5)(2, 8)
Step-by-step explanation:
you plug x into the equation to get y
Answer:
-4, -1, 2, 5
Step-by-step explanation:
I used desmos to graph it