Answer:
A= 78.4602
Step-by-step explanation:
To find the area of a circle, we would need the radius. We can find that from the circumference.
C=2πr
31.4=2πr
31.4/2π= r
r= 157/10π or 4.99747
Now we can use the radius to find the area of a circle.
A=πr^2
A=π(157/10π)^2
C
Four
Let's expand and see how many nonzero terms:
⇒ (x+4)(2x²+3x+9)-3(x³-2x²+7x)=
⇒ 2x³ + 3x² + 9x + 8x² + 12 + 36 - 3x³ + 6 x² - 21 x=
⇒ - x³ + 17x² - 12x + 12
As we see the expression has four nonzero terms
B
18 = 2 * 3 * 3 = 2 *3²
Hint:
Area: 38 cm^2 Perimeter: 28 cm
blegh
