Answer:
30×pi ft
Step-by-step explanation:
ST is the diameter.
the formula for the circumference of a circle is
C = 2×pi×r
r = radius = diameter / 2
so,
C = 2×pi×30/2 = pi×30
therefore, the first answer option is correct.
Answer:
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Step-by-step explanation:
Answer:
B
Step-by-step explanation:
Divide both 28x and -4 by 4 because a square has 4 equal sides. That comes out to 7x-1, therefore answer B is correct.
Answer:
x=20
Step-by-step explanation:
Sorry but I don't have an explanation.
Answer:
There are two when n= 11 and n=-11
Step-by-step explanation: