20. The formula for the area of the circle can be obtained the formula for the area of the circle can be obtained "rearranging" the sectors of a circle in a familiar shape, so using the formula for the area of that shape we will get
Acircle = nr • r = nr. What is the name of that shape?
a. Square
b. Triangle
c. Rectangle
d. Trapezoid

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?