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3 years ago

12

- Suppose you increase your running speed from 7 m/s to 9 m/s in a period of 2 s. What is

1 answer:

loris [4]3 years ago

3 0

Step-by-step explanation:

Initial velocity (u) = 7 m/s
Final velocity (v) = 9 m/s
Time taken (t) = 2s

$\dashrightarrow \quad \rm {a = \dfrac{v -u}{t} } \\$

<em>a</em> denotes acceleration
<em>v</em> denotes final velocity
<em>u</em> denotes initial velocity
<em>t</em> denotes time

$\dashrightarrow \quad \rm {a = \dfrac{9 -7}{2} \; m \: s^{-2}} \\$

$\dashrightarrow \quad \rm {a = \dfrac{2}{2} \; m \: s^{-2}} \\$

$\dashrightarrow \quad \underline{\boxed{\bf {a = 1 \; m \: s^{-2}}}} \\$ (Answer)

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3 years ago

Number of Text Messages a Day A random sample of n = 755 US cell phone users age 18 and older in May 2011 found that the average

Alexeev081 [22]

Answer:

The 95% confidence interval is (29.54 - 53.46}

Step-by-step explanation:

given data:

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b) at 95% confidence interval

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