Liza opens a new savings account. Assuming she deposits $15 every week, which equation represents the balance, y, of the savings account after x weeks?

A) y = 15
B) y = 15x
C) y = x + 15
D) y = x/15 + 1

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)