Answer:
I think of a number z,add 3 to it, then l subtract 8 from it.My answer is 10
A pilot is flying at 10,000 feet and wants to take the plane up to 20,000 feet over the next 50 miles. What should be his angle of elevation to the nearest tenth? (Hint: There are 5280 feet in a mile.)
Options
2.2 degrees
10.7 degrees
87.8 degrees
89.7 degrees
Answer:
[tex] \boxed{ \tt{2.2 \: degrees}}[/tex]
400 UCF students were randomly selected and asked if they preferred washing their hands with soap and water or using hand sanitizer. 102 said they prefer to use hand sanitizer. 400 USF students were randomly selected and asked the same question. 112 said they prefer to use hand sanitizer. You want to examine the difference in the proportion of all UCF (1) and USF (2) students who prefer to use hand sanitizer.
1. Which test should be used to determine if a difference exists between the proportion of all UCF and USF students who prefer to use hand sanitizer?
a. z test for means t test for means.
b. z test for proportions paired.
c. z test for means.
d. paired t test for means.
2. Which alternative hypothesis should be used to determine if a difference exists between the proportion of all UCF and USF students who prefer to use hand sanitizer?
A. HA : mu1 - mu2 < 0.
B. HA : mu1 - mu2 is not equal to 0.
C. HA : mu1 - mu2 > 0.
D. HA : p1 - p2 < 0.
E. HA : p1 -p2 > 0.
Answer:
1. a. z test for means and t test for means.
2. C. HA : mu1 - mu2 > 0
Step-by-step explanation:
Hypothesis testing is used in a situation where there are more than 1 alternative available. The t test is conducted in the mean which determines the t value and then this value is compared with p value to identify the situation whether to accept or reject the null hypothesis. The alternative hypothesis in this situation is is represented by mu.
help is needed DESPERATLY
Answer:
A) 3
Step-by-step explanation:
We have
[tex]S = x<4 = (-\infty, 4)[/tex]
Once
[tex]6, 5, 4.5 \notin S[/tex]
but
[tex]3\in S[/tex]
The answer is 3.
Answer:
A) 3
Step-by-step explanation:
<----|----|----|----|----|----|----|----|----|----|----
-3 -2 -1 0 1 2 3 4
Hope this helps
Does anybody know if it’s possible to find the answers online for Aleks math?
Julie has a large red apple in her hand that is 4 ft off the ground. A blue bird sees the apple at an
angle of depression of 55°. If Julie is 15 ft from the tree, how tall is the tree?
Answer:
Step-by-step explanation:
so from the silly drawing, you can see that the triangle is 4 feet off the ground, and that we want to find the Opp side from our angle of 15 °
Use SOH CAH TOA to recall how the trig functions fit on a triangle
SOH: Sin(Ф)= Opp / Hyp
CAH: Cos(Ф)= Adj / Hyp
TOA: Tan(Ф) = Opp / Adj
use TOA to find the Opp side of the triangle .. which is labeled X
Tan(15) = X / 15
15* Tan(15) = X
4.019 = X
so the bird is up 4 feet in the tree.. not very high up, plus the 4 feet that the apple is already off the ground, soo
the tree... to where the bird is, at least, is 8.019 feet..
did this make sense? :/
hope the drawing helped :P
Which method correctly solves the equation using the multiplication property of equality and the reciprocal of One-third?
One-third (x + 9) = negative 12
The faculty of a certain four-year college consists of 179 teachers. There are 663 first-year students. The student-to-faculty ratio for the entire college is 15 to 1. What is the total number of second-, third-, and fourth-year students?
A 1,989
B 2,022
C 2,652
D 2,685
9514 1404 393
Answer:
B. 2,022
Step-by-step explanation:
The student/faculty ratio tells you the total number of students in the school is ...
(15 students/teacher)×(179 teachers) = 2685 students
If 663 of those are first-year, then the number of upper-level students is ...
upper-level students = total students - first-year students
upper-level students = 2685 -663 = 2022
The total number of upper-level students is 2,022.
01101000
01101001
Step-by-step explanation:
You have 10 cups of olive oil. A batch of your favorite salad dressing requires 1ị cup of olive oil. How many batches can you make? Simplify your answer.
Answer:
You can make 10 batches.
Step-by-step explanation:
PLEASE I NEED HELP QUICK I HAVE A TIME LIMIT
Answer:
Step-by-step explanation:
AC² + AP² = PC²
AC² + 5² = 13²
AC = 12
radius = AC/2 = 6
Meng conducted a survey to determine the favorite flavor of ice cream in
his hometown. Fifteen of the fifty people he surveyed like strawberry best.
How many of the 3,500 residents in the town would you expect to like
strawberry ice cream? *
Answer:
1,050
Step-by-step explanation:
It’s in my notebook, so I can’t show
Factorise the expressions.
Answer:
Q.1 lx²+mx
=x(lx+m)
Q.2 x² - ax - bx + ab
= x(x - a) - b(x - a)
=(x - b)(x - a)
Q.3 6ab - b²+ 12ac - 2bc
= b(6a - b) - 2a(6a - b)
=(b - 2a)(6a - b)
Which property justifies the statement below?
a(2b+c)=a(c+2b)
a. commutative property of addition
b. commutative property of multiplication
c. associative property of addition
d. distributive property
Answer:
The answer is B
Step-by-step explanation:
It is B because in the parenthesis all the numbers do is switch around.
Noah reads the problem, “Evaluate each expression, giving the answer in scientific notation.” The first problem part is: 5.4×105+2.3×104. Noah says, “I can rewrite 5.4×105 as 54×104. Now I can add the numbers: 54×104+2.3×104=56.3×104.”
Answer:5.4×105+2.3×104.
Step-by-step explanation:
Zoe spent 5/10 of an hour jumping rope.Write the amount of time she spent jumping rope as a fraction in simplest form
ONLY THE SMARTEST PERSON IN THE WORLD COULD ANSWER THIS PLZ HELP!
Answer:
...
Step-by-step explanation:
its 1/2
5/10 in simplest form is 1/2
so this is how long she took as a fraction...
(10 POINTS) answer ASAP if you can
Answer: As soon as possible
Step-by-step Explanation: You just say ASAP for As soon as possible
Write the sentence as an inequality.
1. The sum of twice a number n and 8 is at most 25.
Answer:
2n + 8 = 25
try the sign (equal to) or (less than or equal to)
If tan 0 = -2.5, then cot 0 =
= ?
PLEASE SHOW YOUR WORK
Answer:
20percent is the same as 20/100 so .2
Step-by-step explanation:
GIVE BRAINLIEST
Answer:
0.2
Step-by-step explanation:
Whenever you have a percentage
move the decimal over 2 places.
20 = 0.2
Another example
70% = 0.7
287% = 2.87
Weight gain during pregnancy. In 2004, the state of North Carolina released to the public a large data set containing information on births recorded in this state. This data set has been of interest to medical researchers who are studying the relationship between habits and practices of expectant mothers and the birth of their children. The following histograms show the distributions of weight gain during pregnancy by 837 younger moms (less than 35 years old) and 143 mature moms (35 years old and over) who have been randomly sampled from this large data set. The average weight gain of younger moms is 30.67 pounds, with a standard deviation of 14.69 pounds, and the average weight gain of mature moms is 28.52 pounds, with a standard deviation of 13 pounds. Do these data provide strong evidence that there is a significant difference between the two population means
Answer:
From the given data, there is not enough evidence to prove that there is a statistically significant difference between the two population means
Step-by-step explanation:
The number of younger moms, in the study = 837
The average weight gain of younger moms, [tex]\overline x[/tex]₁ = 30.67 pounds
The standard deviation of the weight gain of younger moms, s₁ = 14.69 pounds
(30.67 - 28.52)/√((14.69^2)/837 + 13²/143))
The number of younger moms, in the study = 143
The average weight gain of mature moms, [tex]\overline x[/tex]₂ = 28.52 pounds
The standard deviation of the weight gain of mature moms, s₂ = 13 pounds
The test statistic for the difference in two populations is given as follows;
[tex]t=\dfrac{(\bar{x}_{1}-\bar{x}_{2})}{\sqrt{\dfrac{s_1^{2} }{n_{1}}-\dfrac{s _{2}^{2}}{n_{2}}}}[/tex]
Therefore, we get;
[tex]t=\dfrac{(30.67-28.52)}{\sqrt{\dfrac{14.69^{2} }{837}-\dfrac{13^{2}}{143}}} \approx 1.7919[/tex]
The test statistic ≈ (1.7919)
Using a graphing calculator, we get;
The critical-t = ±1.971379, p = 0.07459697
Therefore, given that the test statistic, (1.7919), < critical-t (0.07459697), we fail to reject the null hypothesis, therefor, the given data does not provide convincing evidence that there is a significant difference between the two population means
Solve for x
Pls help
Answer:
Hey mate....
Step-by-step explanation:
This is ur answer.....
first we need to find the angle that is above 63 degrees, it will be much easier to know the next one....
= (Supplementary angle) 180 - 63
= 117
Expression = 23x + 2
= 23 x ? + 2
= (Multiplication of 23)
= 23 x 5 + 2
= 117
SIMPLE!
Have a look on the pic given below....
HOPE IT HELPS!
MARK ME BRAINLIEST....
FOLLOW ME!!!! :)
the total cost of 2 kg of Apples in 6 of oranges is rupees 570 if the cost of 3 kg of apples is the same as the cost of 5 kg of oranges find the rate of cost of apples and oranges
Answer:
Cost of 1 kg apple = a = RS 102 (Approx.)
Cost of 1 kg orange = b = RS 61 (Approx.)
Step-by-step explanation:
Assume;
Cost of 1 kg apple = a
Cost of 1 kg orange = b
So,
2a + 6b = 570 ....... Eq1
and
3a = 5b..........Eq2
From eq 2
3a = 5b
a = 5b / 3
So,
2a + 6b = 570
2(5b/3) + 6b = 570
b = 61.07
Cost of 1 kg orange = b = RS 61 (Approx.)
a = 5b / 3
a = 5(61) / 3
Cost of 1 kg apple = a = RS 102 (Approx.)
Help please it isn’t D I already tried that and I can’t find anything else on this!
Answer:
its B. because if c plus w equal z then the answer equal B.
what is the area of the composite figure shown
Answer:
area of the figure=
[tex] \frac{1}{2} \times (25 + 31) \times \times 11 \\ \frac{1}{2} \times 56 \times 11 \\ 28 \times 11 \\ 308[/tex]
[tex]12 \times 14 \\ 168[/tex]
[tex]308 + 168 \\ 476[/tex]
Pls help me I will make brainlyest
Answer:
1/12, 30/360 and 30°
Explanation:
the fraction turns through 1/12 of the circle, as shown in the diagram.
1/12 = 30/360, because 360 ÷ 12 × 1 = 30.
thus, the measure of the angle is 30°.
i hope this helps! :D do comment if you have any questions.
PLEASE HELP!! I WILL REWARD BRANIEST!
Answer: nate
Step-by-step explanation:
nate because 7.905 is higher than all of them
3. Tim had 253 dollars to spend on 7 books. After
buying them he had 15 dollars. How much did each book cost?
Answer:
each book costs $34
Step-by-step explanation:
assuming that all the books cost the same,
253-15=238
238/7=34
Answer: Each book cost $34.
Step-by-step explanation:
First subtract 253-15.
253-15=238.
Then divide 238/7.
238/7=34
Hope this helps :)
A brick measures 15 cm in length, 8 cm in breadth and 5 cm in height. How many bricks will be used to make a wall of length 15 cm, breadth 10 cm and height 8 cm
1. 2 bricks
2. 5 bricks
3. 9bricks
4. 4bricks
Answer:
2bricks
Step-by-step explanation:
volume of cuboid = length × breadth ×height
step 1 : calculate the first one
v= 15cm ×8cm× 5cm = 1200cm^3
step 2 calculate the 2nd one
v= 15cm ×10cm×8cm = 600cm^3
number of bricks
1200cm^3 × 1bricks/ 600cm^3 = 2 bricks
ACTIVIDADES DE REFORZAMIENTO (SUGERENCIAS)
CON BASE EN EL SIGUIENTE DIBUJO, JUSTIFICA LA FÜRMULA PARA CALCULAR EL ÁREA DEL CUADRILATERO
2.. CON BASE EN EL SIGUIENTE DIBUJO, JUSTIFICA LA FURMULA PARA
CALCULAR EL ÁREA DEL TRIÁNGULO
JUSTIFICACIÓN
JUSTIFICACIÓN
Answer:
Para medir el área de una figura se multiplica la base × Altura
Step-by-step explanation:
Espero que eso te ayude :D
what is 4.5609+3.098
Answer:
7.6589
Step-by-step explanation:
A set of four postcards costs $1.00. Single postcards cost $0.50. What is the least amount of money you
can spend to buy exactly 15 postcards?
Answer: 3 Sets of the 4 post cards and 3 of the single post cart sets.
Step-by-step explanation:
You buy 3 of the 4 post card set becuase that is the most you can get of those to get under 15 post cards.
You would now have 12 postcards now you have to buy 3 of the single set to get to 15 cards