Acompany that manufactures cell phones has done research to determine how the pricing of thier phones affects how many they sell and how much money they make. they have determined that if p is the price of a phone in dollars, the following equations model thier cost, c, and revenue, r. c=500+200p and r= -p^2+800. what range can they price the cell phones so there will be a profit

a. less than $130 or more than $770

b. less than $200 or more than $500

c. between $130 and $770

d. between $200 and $500

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

.95

step-by-step explanation:

answer: c. im 100 percent sure

step-by-step explanation: