Uh hi pls help with this really easy math question

For each proportion find the unknown number x 1/5/8=×/15

Find the area of the unshaded square

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27