Uhh i just need to know if i did this right or not

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)

Pls the last one and it has to be like number 6

The graph shows the amount of money noah earned based on the number of lawns he cut. which list shows the dependent quantities in the graph?