We have two congruent trapezoids.
The formula of an area of a trapezoid:

We have:

Substitute:

Answer:

9 plates x 15 cups = 135 total cups.
135 cups x 10 chocolate balls = 1,350 total.
Answer:
5.736x^4 - 2x^2 +22x - 54
Step-by-step explanation:
Answer:
It could be to: collect data from a sample of every twentieth student who arrives at school one day