Can you take a pic of the problem?
Answer:
Option 4:
is the correct answer.
Step-by-step explanation:
The given fractions are mixed fractions. the mixed fractions have to be converted into proper fractions before performing any operation like addition, subtraction etc.
Given fractions are:

Converting into proper fractions

Making the denominator same
We have to multiply first fraction by 3 and second by 6

Converting into mixed fraction: 
Hence,
Option 4:
is the correct answer.
1 ft. = 12 in.
So that'd be 19 inches.
Answer: 36,960 ft
Step-by-step explanation:
Each lap around the track was a mile in distance.
Petrov therefore ran a total of 7 miles.
A mile is 5,280 feet.
If Petrov ran 7 miles in total, this distance in feet is:
= 7 * 5,280
= 36,960 ft