samantha puts an initial $500 into a savings account. the account has a 4% annual compound interest rate. what is the function that best represents samantha's account and how much does she have in savings after 5 years? round your answer to the nearest dollar.
hint: use the formula, f(x) = p(1 + r)x.

answer:

c) the x-coordinate of the center of the circle increases by 3

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15