21. Write the standard form of the number that can be represented in
the following way:
80 + 400 + 5.

1010: 3030

is it i think

hey! so 1 (25) out of 4 (100) is 25 so your answer is 25%. it's like quarters!

constant of proportionality = 3 and the equation is c = 3p.

step-by-step explanation:

c = kp   where c = amount of caffeine in mg., p = oz of pepsi and k is the constant of proportionality.

substituting the values given:

24 = 8k

k = 3.

the same value of k will be obtained if we substitute the other given values.