Arocket car on the bonneville salt flats is traveling at a rate of 640 miles per hour. how much time would it take for the car to travel 384 miles at this rate?

0.6 hour    or      36 minutes

Step-by-step explanation:

We can use proportion to solve this problem.

640 miles =  1 hour

384 miles   =  x

cross-multiply

640 x   =  384

Divide both-side of the equation by 640

 =  

(On the left-hand side of the equation 640 at the numerator will cancel-out 640 at the denominator, while on the right-hand side of the equation 384 will be divided by 640)

x  =    

x  = 0.6 hour

or

x = 0.6×60 = 36 minutes

Therefore the time it would take the car to travel 384 miles is 0.6 hour  or  36 minutes  

the answer is 24

step-by-step explanation:

2 & 7

step-by-step explanation:

he climbs 300 ft/hr at a constant rate. the peak is at 1,500 ft.

when going up, he reaches 600 ft in 2 hours. remember, that he is going in a constant rate. divide 600 with 300:

600/300 = 2

assuming that he takes the same route back (meaning that it's a 1500 ft route back, you can solve.

note also that you are solving when he gets back to 600 ft after he reaches the peak.

first, find the amount of hours it takes to get up the peak. divide the total amount (1500), with the ft/her (300) to get the amount of hours (x):

1500/300 = x

x = 5

it takes jamie 5 hours to get up. now, he is returning down, and reaches 600 (his current destination). remember that he climbs at a constant 300 ft/hr. divide 600 with 300:

600/300 = x

x = 2

now add the two numbers together.

x = 5 + 2 = 7

jamie takes 7 hours to go up the mountain and reach his current position when descending.

(total amount/constant rate) = (time).

remember that it is a constant rate, so in total, when he gets back down the mountain, it will take the same amount of time as when he goes up. the total amount for the round trip is: 5 + 5 = 10.

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