It took a race car driver 3 hours and 15 minutes to go 500 miles. what was his mean rate of speed, to the nearest tenth of a mile per hour?

The mean rate of the racer is 153.8 mph.

Step-by-step explanation:

It took a race car driver 3 hours and 15 minutes to go 500 miles.

Now converting 3 hours and 15 minutes to hours.

15 minutes = hours

Now, we have that it took a race car driver 3.25 hours to go 500 miles.

So, the average speed will be = =153.8 mph

Hence, the mean rate of the racer is 153.8 mph.

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²