The odometer reading on a truck reads 23,125 miles. The truck originally had P245/70R16 tires but the owner replaced them with P285/70R16 tires
when he acquired the new truck. What then would be the real odometer
reading if the circumference of the P245s is 92.69 inches and the
circumference of the P285s is 99.62 inches?

24,853.9 or 24,743.8

Step-by-step explanation:

k = 99.62/92.69

k = 1.0748

Actual odometer = 1.0748*23125

Actual odometer = 24,853.9

or you could 1.07*23125 and get = 24,743.8

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet