What is the percentage difference in average lifetime earnings of a college graduate earning $60,000 / year vs. a high school graduate earning $38,000 / year?

answer: i'm not sure

step-by-step explanation:

can i see the following ?

step-by-step explanation:

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.