Graham drove 42 1\3 miles in 1 1\3 hours. how many miles did he drive in an hour?

Graham will travel 31 3/4 miles if he drove 42 1\3 miles in 1 1\3 hours.

The amount of miles he drove in an hour is its speed. The formula for calculating the speed of Graham is expressed using the formula below

Speed = Distance/Time

Given the following parameters

Distance = 42 1\3 miles = 127/3 miles

Time =  1 1\3 hours = 4/3 hours

Substitute into the given formula as shown;

Distance = 127/3 ÷ 4/3

Distance traveled = 127/3 × 3/4

Distance traveled = 127/4

Distance traveled = 31 3/4 miles

Hence Graham will travel 31 3/4 miles if he drove 42 1\3 miles in 1 1\3 hours.

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Graham was driving 31.75 miles per hour.

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)