<span>C.
The diagonals are perpendicular.
</span>
Answer:
9
Step-by-step explanation:
40% of 15 = 6.
1/6 of 18 = 3.
6 + 3 = 9.
Let x = number of days
The initial number of frogs = 21.
The number of frogs triples every 7 days.
The exponential function that models the number of frogs with respect to the number of days is

When the population is 150, then

A graph of y versus confirms the answer.
Answer: 12.5 days
8th, I wanna graduate already
Hello!

To find the amount of cookies sold, we will need to divide the cost of each cookie from the total raised. Therefore:
Let c = cookies sold
60 = 0.75c
Divide both sides by 0.75:
60 / 0.75 = c
c = 80 cookies.