Perpendicular lines are two distinct coplanar lines that intersect to form what type of angle?

Can some one me with this math problem?

What is the result of converting 60 ounces to pounds remember there are 16 ounces in a pound

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