Answer:
$5.15
Step-by-step explanation:
$20
-$14.85 =$5.15
Jenny started with 20 markers
her sister gave her 64
Answer:
The missing exponent is 20.
Step-by-step explanation:

upper exponent minus lower exponent.
Answer:
constant of proportionality
Step-by-step explanation:
Assuming that we have two proportional quantities; one is x and one is y.
If we know whether the relationship between them is direct or inverse proportion, then the ratio of the two quantities y/x gives us a constant generally known as the constant of proportionality.