Hh is a trigonometric function of the form h
(
x
)
=
a
cos
⁡
(
b
x
+
c
)
+
d
h(x)=acos(bx+c)+dh, left parenthesis, x, right parenthesis, equals, a, cosine, left parenthesis, b, x, plus, c, right parenthesis, plus, d.
Below is the graph of
h
(
x
)
h(x)h, left parenthesis, x, right parenthesis. The function has a maximum point at
(
3
,
6
)
(3,6)left parenthesis, 3, comma, 6, right parenthesis and a minimum point at
(
6.5
,
−
9
)
(6.5,−9)left parenthesis, 6, point, 5, comma, minus, 9, right parenthesis.
Find a formula for
h
(
x
)
h(x)h, left parenthesis, x, right parenthesis. Give an exact expression.

Aschool typically sells 500 yearbooks each year for 50 dollars each. the economic calls does a project and discovers that they can sell 100 more yearbooks for every $5 decrease in price. the revenue for yearbook sales is equal to the number of yearbooks sold times the price of the yearbook. let x represent the number of $5 decrease in price. if the expression that represents the revenue is written in the form r(x)=(500+ax)(50-bx). to maximize profit, what price should the school charge for the yearbooks? what is the possible maximum revenue? if the school attains the maximum revenue, how many yearbooks will they sell?

Pls! does anybody know a shortcut for answering these types of questions in the future?

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.