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SashulF [63]
3 years ago
5

A car is traveling at a rate of 72 kilometers per hour. What is the car's rate in meters per second? How many meters will the ca

r travel in 15 seconds? Do not round your answers.
Mathematics
1 answer:
Korolek [52]3 years ago
8 0
72 Kilometers = 72000 meters

1 hour = 3600 seconds

So if 72000m = 3600 secs
To find 1 sec, divide through by 3600
20m = 1 sec
To find the distance travelled in 15 secs we multiply by 15
300m = 20 secs
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During the days leading up to her piano recital, Lana practiced an average of 1 5/12 hours per day. Her total practice time was
marshall27 [118]

Answer:

<h2>8</h2>

Step-by-step explanation:

Divide 11 1/3 by 1 5/12 to find out the rough amount of days she practiced.

11.3333/1.41667 = 7.9999 or about 8

PLEASE MARK BRAINLIEST!

8 0
3 years ago
WILL MARK U AS BRAINLIEST PLZ HELP
Radda [10]

Answer:

112 if you don't include the triangle sides as they are not necessary, but 124 if you include one triangle and 136 if you include both triangle sides

5 0
3 years ago
Find the dimensions of a rectangle with perimeter 84 m whose area is as large as possible.
Slav-nsk [51]
21 and 21
(it's a square)
and yes, a square is a rectangle
8 0
3 years ago
Molybdenum rods are produced by a production line setup. It is desirable to check whether the process is in control, i.e. equal
ikadub [295]

Answer: Test statistic = -8 and rejected region is  (-∞,-1.966) and (1.966, ∞)

Step-by-step explanation:

Since we have given that

X is the length of a rod.

Sample Mean = 2 inches

Standard deviation = 0.5 inches

n = 400

Hypothesis are

H_0:\mu=2.2\\\\H_1:\mu\neq 2.2

Test statistics would be

t=\dfrac{\bar{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}}\\\\t=\dfrac{2-2.2}{\dfrac{0.5}{\sqrt{400}}}\\\\t=-8

Degrees of freedom = n-1 =400-1 =39

and \alpha =0.05\\\\\dfrac{\alpha }{2}=\dfrac{0.05}{2}=0.025

Using the t-distribution table, we get that critical value z = 1.966

Since the two tail test will be applied to this,

So, the acceptance region will be (-1.966, 1.966)

Hence, the rejected region will be (-∞,-1.966) and (1.966, ∞)

5 0
2 years ago
2. A plumber uses 16 inches of tubing to
BaLLatris [955]
Well he says he needs 16 inches of tubing for each washing machine and he is trying to install 18 washing machines. 
sooo all we have to do is multiply 16 times 18
lets do the math:)
16 x 18 = 288
whats your answer? well its 288 inches of tubing 
have a good one:) 

merry christmas:D
4 0
3 years ago
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