Which circles have an area of 9pi m2? Choose all answers that are correct. A. a circle with a radius of 3 m B. a circle with a diameter of 6 m C. a circle with a radius of 9 m D. a circle with a diameter of 9 m. Multiple Choice Question!

Answers

Answer 1

Answer: The formula of the area of a circle is
A = $\pi$ r²
given the area, find the radius

9 $\pi$ m² = $\pi$ r²
Divide by $\pi$

$\pi$ cancels out on both sides

9 = r²
Take square root on either sides
$√(9)$ = $√(r^2)$
3 m = r
The radius = 3 meters
Be careful for the units given
Its METERS

A. A circle with radius of 3 m
B. A circle with diameter of 6 m
(diameter = 2×radius, 2 × 3 = 6)

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Which is a true statement? A. –11.6 > 7.52 B. –5.39 > –4.21 C. 8.7 < 8.63 D. –6.29 < –4.81

Answers

Well first lets review the information on these numbers. A negative number is less than 0. So the bigger the negative number, the smaller it actually is.

So...

a) -11.6 > 7.52 (A negative is not greater than a positive!)
b) -5.39 > -4.21 (The bigger the negative the smaller the number -Nope!)
c) 8.7 < 8.63 (Nope- you can tell just by knowing the common number)
d) -6.29 < -4.81 (YES!!)

hope that helps!

D.
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Answers

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Answer: No

Step-by-step explanation:

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Good Luck!

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