The area of the entire circle = pi r^2
The area of the shaded area = (40/360) * pi r^2
r = 9 cm
Area of the shaded area = 1/9 * 3.14 * 9^2
Area of the shaded area = 3.14 * 9
Area of the shaded area = 28.26
Notice one of the 9s disappeared. Where did it go?
You could begin the problem by writing out 9^2
Area = 1/9 * 3.14 * 9 * 9 Notice that 1/9 will cancel out 1 of the nines.
28.26 yds = Shaded area.
470 miles in 2 hrs......470/2 = 235 per hr
in 12 hrs...
235 * 12 = 2820 miles <==
F is a linear function then f(x)=ax+b
when x=0, f(0)=2
f(0)=b ⇒ b=2
f(-4)=5
f(-4)= -4a+b
-4a+2=5
4a=2-5
4a=-3
a= -3/4
⇒f(x)= -3/4x+2 is the equation