Answer:
+81
Step-by-step explanation:
neg times a neg = a positive
Answer:
61.74
Step-by-step explanation:
so u start off by solving for ghe semicircles.
the formula I wrote for it was:
1/2(3.14)(3)(3)=14.13
then i multiplied it by 2 because the other semicircle so you get:
28.26
then u find the area of the rectangle and subtract 28.26.
15x6=90
90-28.26=61.74
12^2 +b^2 = 20^2 because of the Pythagorean theorem
144 + b^2 =400
B^2 =256
B=16
Answer: 64 units
Step-by-step explanation:
Remember, the formula to find surface area given radius is 
. Let's add in the given information:
4pi4^2 =
4pi16
64pi!
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Answer:
27
Step-by-step explanation:
<u><em>First, you would do 7+2 to get 9 and then multiply it by itself to get 81. Next, you divide 81 by 3 to get 27.</em></u>
