B is your answer because 20 - -10 is 10 brainliest please
I've attached a plot of one such cross-section (orange) over the region in the x-y plane (blue), including the bounding curves (red). (I've set

for this example.)
The length of each cross section (the side lying in the base) has length determined by the horizontal distance

between the y-axis

and the curve

. In terms of

, this distance is

. The height of each cross section is twice the value of

, so the area of each rectangular cross section should be

.
This means the volume would be given by the integral
Answer:
9π ft² or approximately 28.26 ft²
Step-by-step explanation:
The area of a circle is A=πr².
Plug 3 in for the radius.
A=π(3²)
A=9π ft²,
or using 3.14 for pi,
Approximately 28.26 ft².
Step-by-step explanation:
100%=>$2,300
45%=>x
x=$2,300×45÷100=$1035
The pay left for other purposes
$2300-$1035=$1265
Or:
100%=>$2,300
55%=>x
x=$2,300×55÷100=$1265.
The answer is a.
Point A and point B