a car is travelling at exactly 6 miles per hour and accelerates at a constant rate to exactly 65 miles per hour.
this acceleration takes exactly 14.8 seconds.
what is the rate of acceleration, in miles per hour2?

Step-by-step explanation:

Let's find a solution by understanding the following:

The acceleration rate is defined as the change of velocity within a time interval, which can be written as:

where:

A=acceleration rate

Vf=final velocity

Vi=initial velocity

T=time required for passing from Vi to Vf.

Using the problem's data we have:

Vf=65miles/hour

Vi=6miles/hour

T=14.8seconds

Using the acceleration rate equation we have:

, but look that velocities use 'hours' unit while 'T' uses 'seconds'.

So we need to transform 14.8seconds into Xhours, as follows:

Using X=0.0041hours in the previous equation instead of 14.8seconds we  have:

In conclusion, the acceleration rate is

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer