Question on area of a circle

Answers

Answer 1

Answer: The area formula of a circle is:
A = $\pi$ r²

given is the diameter = 44 ft so the radius is
r = $(d)/(2) = (44)/(2) = 22 ft$

Apply the formula
A = $\pi$ (22)²
= 484 $\pi$ ft²

Answer is the second options, B. 484 $\pi$ ft²

Answer 2

Answer: Please see the pic, I'd solved in it.

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What decimal is represented by this expanded form?5 x 10,000 + 3 x 1,000 + 2 x 10 + 8 x 1 + 6 1/1,000 + 4 x 1/,000

Answers

5 x 10,000 + 3 x 1,000 + 2 x 10 + 8 x 1 + $6 (1)/(1000)$ + 4 x $(1)/(1000)$

you want to make the $6 (1)/(1000)$ into a whole number:
$6 (1)/(1000)$ = 6.001

new equation:
5 x 10,000 + 3 x 1,000 + 2 x 10 + 8 x 1 + 6.001 + 4 x $(1)/(1000)$
50,000 + 3 x 1,000 + 2 x 10 + 8 x 1 + 6.001 + 4 x $(1)/(1000)$
50,000 + 3,000 + 2 x 10 + 8 x 1 + 6.001 + 4 x $(1)/(1000)$
50,000 + 3,000 + 20 + 8 x 1 + 6.001 + 4 x $(1)/(1000)$
50,000 + 3,000 + 20 + 8 + 6.001 + 4 x $(1)/(1000)$
50,000 + 3,000 + 20 + 8 + 6.001 + .004
53,000 + 20 + 8 + 6.001 + .004
53,020 + 8 + 6.001 + .004
53,028 + 6.001 + .004
53,034 + .004
=53,034.005

a rectangle has an area of 30 square meters and a perimeter of 34 meters. what are the dimensions of the rectangle?