Answer:
52² - 42² = ( 52 - 42 )· ( 52 + 42 ) = 10 · 94 = 940;
Step-by-step explanation:
Answer:
615.75
Step-by-step explanation:
you divide 87.92 by pi (3.14 in this case) to get diameter, which you divide by 2 to get the radius to solve for area which you get 615.75
Answer:

Step-by-step explanation:
we know that
The area of rectangle is equal to

we have


substitute the given values in the formula of area

Remember that
----> by completing the square
substitute

Simplify

Answer: 1/27
Step-by-step explanation: