Christine is putting money into a savings account. she starts with $550 in the savings account, and each week she adds $30 . let s represent the total amount of money in the savings account (in dollars), and let w represent the number of weeks christine has been adding money. write an equation relating s to w . then use this equation to find the total amount of money in the savings account after 11 weeks.

-5, your answer was correct

the answer is b.

surface area: 169π

volume: 366π

i got it down.

(a) x intercepts: -6 and 2

you can obtain these by solving the equation 0=x^2 +4x-12 using your favorite quadratic formula. but it is easy to verify -6 and 2 indeed satisfy this equation.

(b) y intercept: -12

this is obtained by setting x=0: 0^2+4*0-12 = -12

(c) the minimum value is: -16 (this is the vertex)

you can get the vertex by rewriting the equation into the form:

there is no global or local maximum as the function goes to infinity, so only in the limit sense: +infinity.