Sandy made this line plot to show how many hours she read on each of 10 days. She said the
difference between the greatest time and the
least time she read in one day was 1 3/4 hours

a. she will receive a refund of $278.

step-by-step explanation:

the answer is 99.

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.