Answer:
Step-by-step explanation:
A.True
an equation for a circle has formula
(x-m)² + (y-n)² = r²
where (m,n) is its center
and r is its radius
so, the equation has center (4,3) and radius 4
the equation is derived from the pythagorean theorem
Percent decrease=decrease/original
decrease=160-152=8
original=160
8/160=1/20=5/100=5%
5% decrease
D is answer
This is a ratio problem. You only need solve the ratio of the sand.
<u> 48 </u> <u /> = <u> n </u> <u />
1 156
(48)(156) = 1(n) (cross multiplying)<span>
</span>
7,488 pounds
To check: The pool deck is 156 times larger than the original amount of concrete so the amount of sand needs to be 156 times more.
The circumference of a circle is 2
r
2 (
) 6
12
The area of a circle is
r²
(6²)
36