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Greeley [361]
3 years ago
5

A car is merging onto a freeway (beginning at rest), accelerating at a constant rate of 10ft/sec2. How long does it take to reac

h merging speed at 70mph?
Mathematics
1 answer:
masha68 [24]3 years ago
5 0

Answer:

<h2>10.3seconds</h2>

Step-by-step explanation:

Step one:

given data

acceleration,a= 10ft/sec^2

final velocity v= 70mph

first, let is convert mph to ft/sec

1mph is 1.46667 ft/sec

70 mph is x

cross multiply we have

x= 102.7ft/s

Step two:

we are using the first equation of motion

v=u+at

initial velocity u= 0m/s

102.7=0+10*t

102.7=10t

divide both sides by 10

t=10.3seconds

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Answer:

Probability that event will have both red marbles will be 2.3% or 0.023.

Step-by-step explanation:

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Probability both will have red =1/6*4/29

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