Answer:
t = 22.22 s
Step-by-step explanation:
Given that,
The initial speed of the train, u = 40 km/h
Acceleration of the train, a = 0.5 m/s²
Finally, it stops, v = 0
We need to find the time taken by it to stop. using first equation of motion to find it such that,
[tex]v=u+at\\\\t=\dfrac{v-u}{a}\\\\t=\dfrac{0-40\times \dfrac{5}{18}}{-0.5}\\\\t=22.22\ s[/tex]
So, it will take 22.22 seconds to stop.
Total surface area if 5.5in 4.5in and 3 in
Answer:
109.5in squared
Step-by-step explanation:
Use formula b x h to solve each rectangular side, after wards add the values up.
Jessica bought 1/2 pound of roast beef and 5/6 pound of ham. Which pairs of fractions are equivalent to the amounts Jessica bought? Mark all that apply.
A.8/16 and 10/16
B.6/12 and 10/12
C.5/10 and 8/10
D.12/24 and 20/24
A salmon is swimming in a river that is flowing downstream at a speed of 2 miles per hour. The slamon can swim 12 miles upstream in the same amount of time it would take 24 miles downstream. What is the speed of the salmon in still water?
Answer:
The speed of the salmon in still water is 6 mi/h
Step-by-step explanation:
When an object moves with a speed So (So measured in still water) in a river with speed Sr:
If the object moves along the current (downstream), then the actual speed of the object will be:
S = So + Sr
If the object moves upstream, then the velocity will be:
S = So - Sr
In this case we know the speed of the river downstream is 2 mi/h
Sr = 2mi/h
And we know that the salmon can swim 12 miles upstream in the same time (T) that it can swim 24 miles downstream.
Here you need to remember the relation:
Distance = Time*Speed.
Then we know that:
24 mi = (So + 2mi/h)*T
12 mi = (So - 2mi/h)*T
Now we can take the quotient of these two equations to get:
(24mi/12mi) = ( (So + 2mi/h)*T)/((So - 2mi/h)*T)
2 = (So + 2mi/h)/(So - 2mi/h)
Let's multiply both sides by the denominator of the right part:
2*(So - 2mi/h) = (So + 2mi/h)
2*So - 4mi/h = So + 2mi/h
Now we need to isolate So, the speed of the salmon in still water:
2*So - So = 2mi/h + 4mi/h
So = 6mi/h
The speed of the salmon in still water is 6 mi/h
Two angles of a triangle are the same size. The third angle is 3 times as large
as the first. How large are the angles?
Take your time please.
Answer
1 2/7 and 4 2/4
Step-by-step explanation:
19/7-10/7=1 2/7 and 5/4 + 7/4 + 6/4 = 4 2/4
Answer:
The first one is approximately 1.29 and the second one is 4.5.
Step-by-step explanation:
Hope this helps!
Hi please help me I'm in the middle of a test and I don't want to get grounded
Answer:
8(3j-2)
Step-by-step explanation:
Answer:
A.
[tex]8(3j - 2)[/tex]
If you don’t know the answer please don’t answer don’t answer anything please
9514 1404 393
Answer:
(-1, -1/2)
Step-by-step explanation:
The midpoint is the average of the end points.
((-11, 0) +(9, -1))/2 = (-2, -1)/2 = (-1, -1/2)
The midpoint is (-1, -1/2).
q/13 + 11 = 13 Please show me a step by step
Answer:
q=22
Step-by-step explanation:
it will take me a sec to explain hang on
Answer:
26
Step-by-step explanation:
Solve for q:
q/13 + 11 = 13
Put each term in q/13 + 11 over the common denominator 13: q/13 + 11 = q/13 + 143/13:
q/13 + 143/13 = 13
q/13 + 143/13 = (q + 143)/13:
(q + 143)/13 = 13
Multiply both sides of (q + 143)/13 = 13 by 13:
(13 (q + 143))/13 = 13×13
(13 (q + 143))/13 = 13/13×(q + 143) = q + 143:
q + 143 = 13×13
13×13 = 169:
q + 143 = 169
Subtract 143 from both sides:
q + (143 - 143) = 169 - 143
143 - 143 = 0:
q = 169 - 143
169 - 143 = 26:
Answer: |
| q = 26
g According to the U.S. department of Agriculture (USDA), 48.9% of males aged 20 to 39 years consume the recommended daily requirement of calcium. After an aggressive "Got Milk" advertising campaign, the USDA conducts a survey of 35 randomly selected males aged 20 to 39 and finds that 21 of them consume the recommended daily allowance (RDA) of calcium. At the ????=0.05level of significance, is there evidence to conclude that the percentage of males aged 20 to 39 who consume the RDA of calcium has increased?
Answer:
We can conclude that there is no sufficient evidence to conclude that the percentage of males aged 20 to 39 who consume the RDA of calcium has increased
Step-by-step explanation:
H0 : p = 0.489
H1 : p > 0.489
Phat = x/ n ; x = 21 ; n = 35
Phat = x/ n = 21 / 35 = 0.6
Test statistic :
(Phat - P0) ÷ sqrt[P0(1 - P0) /n]
1 - P0 = 1 - 0.489 = 0.511
Phat - P0 = 0.6 - 0.489 = 0.111
Test statistic = 0.111 ÷ sqrt[(0.489 * 0.511) / 35]
Test statistic = 0.111 ÷ sqrt(0.0071394)
Test statistic = 0.111 ÷ 0.0844949
Test statistic = 1.314
Pvalue from Tstatistic :
Pvalue = P(Z < 1.314) = 0.90558
α = 0.05
Pvalue > α ; Hence, we fail to reject the Null
We can conclude that there is no sufficient evidence to conclude that the percentage of males aged 20 to 39 who consume the RDA of calcium has increased
Can someone help me pls
Answer: if I help you can you plz put me as a brainly the answer is 15
Step-by-step explanation:
Step-by-step explanation:
hope this help! have a great day
What is the arc length if
0 = 2π / 3 and the radius is 4 cm?
A. 8π / 3
B. 16π / 3
C. π / 6
D. 3π / 4
Answer:
A. 8π / 3
Step-by-step explanation:
What is the slope of the line passing through points A and B?
Please help
Answer:
C: 1/4
Step-by-step explanation:
it is correct! i hope u enjou
Answer:
1/4
Step-by-step explanation:
Between A and B, the line 'rises'/goes up 1 block vertically and 'runs'/goes across 4 blocks horizontally.
Slope = rise/run = 1/4
1. Last week Bradley worked 32 hours
and earned $312.96. What did he
earn per hour?
A $9.75
C $10.30
B $9.78
D $10.09
Answer:
B ($9.78)
Step-by-step explanation:
OMG PLS HELP!!!!!!!!!!!!!! A rectangular prism has a height of 20 cm, length of 7 cm and width of 5 cm. Use the volume formula to find the volume of this prism. A. 140 cm3 B. 500 cm3 C. 700 cm3 D. 900 cm3
Answer:
The correct answer is C: 700 cm³
Step-by-step explanation:
V = l × w × h
V = 7 × 5 × 20
V = 7 × 100
V = 700
Solve the following:
NO BOTS OR PEOPLE WANTING POINTS
Answer:
8
Step-by-step explanation:
PEMDAS
so answer all exponets
100-(100+64)/8
100-164/8
-64/8
answer= -8
How many squares are in this figure in all?
Answer:
explanation
Step-by-step explanation:
there
are
22
squares
all
together
There are 23 Squares within this figure
Write te expanded form of 54 72/100 in a fraction form
Answer: fifty-four and seventy-two hundredths
Look at the equation.
3+4(5−x)=19−4x+4
How many solutions does the equation have? Explain your answer.
Answer:
infinite solutions
Step-by-step explanation:
3+4(5−x)=19−4x+4
Distribute
3 +20 -4x = 19 -4x +4
Combine like terms
23 -4x = 23 -4x
Add 4x to each side
23-4x+4x = 23-4x+4x
23 =23
This is always true so there are infinite solutions
identify the first four numbers in an arithmetic sequence modeled by the formula below. a1 = 10 an = an-1+5
Answer:
1. = –5 and the recursive formula to find the next four terms. The first five terms are –5, –10, ... Use the formula for an arithmetic sequence. The first term a. 1 is 1, and n ≥ 2. ... 5. BALL A ball is dropped from an initial height of 10 feet. The maximum heights the ball ... CCSS MODELING A landscaper is building a brick patio
Step-by-step explanation:
What is the median temperature
Answer:
88
Step-by-step explanation:
88 is the middle number all other numbers are either greater or smaller
they all revolve around the two numbers 88 and 88 when they are added together and divided by two it equals 88
A mason gets $684 for 9 days
of work how many days
should he work to get $912
Answer:
12days
Step-by-step explanation:
A mason gets 76 dollars per day. To get 912 dollars, divide 912 by 76. 12days.
Answer:
12 days
Step-by-step explanation:
912/76 = 12
Weekly wages at a certain factory are
normally distributed with a mean of
$400 and a standard deviation of $50.
Find the probability that a worker
selected at random makes between
$400 and $450.
We must use the formula of the z-score to find the the probability that a worker selected at random makes between $400 and $450 dollars. Then let X1 = 400 and X2 = 450 with the mean μ = 400 and standard deviation σ = $50. Then,
z1 = (X1 - μ) / σ = (400-400) / 50 = (0/50) = 0.00 and
z2 = (X2 - μ) / σ = (450 - 400) / 50 = (50/50) = 1.00
Then, the probability yields, P(0.00 ≤ z ≤ 1.00) = 0.3413 - 0.0000 = 0.3413
Answer: 34%
Step-by-step explanation:
The probability that a worker selected at random makes between $400-$450 is 34%
BRAINLIEST AND ACED+ PLEASE HELP ME :c
Answer:
1 1/2 x 4 1/2 x 5 = 33 3/4
A quantity with an initial value of 140 decays continuously at a rate of 4% per decade. What is the value of the quantity after 98 years, to the nearest hundredth?
(pls answer)
9514 1404 393
Answer:
93.84
Step-by-step explanation:
The exponential function will be of the form ...
q = a×b^t
where 'a' is the initial quantity and b is the growth factor per time period t.
If we use decades as the time period, then the growth factor is 1 more than the growth rate of -4%. For the initial value 140, the function is ...
q = 140×(1 -4%)^t
q = 140×0.96^t
98 years is 9.8 decades, so the quantity q remaining will be ...
q = 140×0.96^9.8 ≈ 93.84
The quantity remaining will be 93.84 after 98 years.
Answer:
94.6
Step-by-step explanation:
ILL GIVE THE BRAINLIEST pls help me with this question just tell me which one is the right answer you can show your work if you want to you don't have to EVERYTHING IS IN THE PICTURE PLS HELP DUE TODAY IF YOU DON'T PUT THE RIGHT ANSWER ILL REPORT YOU FASTER THAN THIS IS DUE
Answer:
both are correct
Step-by-step explanation:
CAN SOMEONE HELP ME UNDERSTAND THIS PLEASE
YEAH OFC SHAWTY!
so for A its -4^11 because if the powers have the same base and they are being multiplied you add the powersFor B its the same idea, they have the same base, and are being multiplied so you add the powers- 13^9For C its similar, you have the same base, but since its Dividing, you subtract the powers. So, 9^5for D you pretend like the denominator has a power of 1 and subtract. So its -24^5-24^1 which hopefully puts it into perspective of being -24^4 becuase we subtracted the powersI cant do 2 right now, but i will in a minute
And for 3 his mistake is that they arent the same bases so he cant add the powers, he should have converted them to the same base first.
Help ASAP please ‼️
What is the value of x?
(5х)
o 14
15
оооо
110
110°
70°
Answer:
14
Step-by-step explanation:
The internal angle sum of a 4 sided polygon is 360 so set it equal to 360. 5x+110+110+70=360
5x+290=360
5x=70
x= 14
Which of the following would have the same graphic representation as the function
f) = 16.2^x? Select all that apply.
Answer:
the first on and the 4th one
Step-by-step explanation:
find the perimeter of the figure below.
PLEASE GIVE A EXPLANATION
Sams sells a 5-lb bag of beans for $17.25. How much is the unit price?
Answer:
$3.45
Step-by-step explanation:
17.25 divided by 5 is equal to 3.45