The area of a circle is calculated as pi*(r^2). Given a diameter of 26 cm, the radius is half the diameter, which is 26/2 = 13 cm.
Therefore the area is pi*(13^2) = 169 pi.
Another alternative formula for the area is pi*(d^2 / 4). Substituting d = 26 would give pi*(26^2 / 4) = pi*(676/4) = 169 pi, which is the same answer.
So the correct answer is C.
Take the two shapes separately:
Rectangle:
l x w = A
22 x 17 =?
Triangle:
.5b x h = A
.5(12) x 19 = ?
A of Triangle + A of Rectangle = total Area
no it isn't. 2cos(x) is 2 multiplied by cos(x), cos (2x) is cos(2 multiplied by x) meaning 2x is the angle you're taking the cosine of. if you want to know what cos(2x) look up the double angle rule.
Answer:
$8
Step-by-step explanation:
You subtract 13 from 21 to get how much Shawna spent the day before.
21 - 13 = 8
Shawna spent $8 yesterday.