Adele is driving her car near the tri-state area. she covers a distance of 221.05 miles in 4 hours. she then stops at a diner, and drives 83 miles more at the same speed. what would be the best estimate of the time she took to cover this last distance?

a.
2 hours
b.
1 hour
c.
2.5 hours
d.
1.5 hours

The answer is D.  1.5 hours

First we need to calculate the speed using the following formula and the given information:

Where:

By substiting we have:

So, to calculate the time she took to cover the last distance, we need to use the calculated speed:

The time she took to cover the last distance is D.  1.5 hours

Have a nice day!

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50