So it gives you the diameter but you need the radius of the circle to find the area so to find the radius you just divide the diameter by two. the formula for the area of a circle is A=pi*r^2 so you just multiply 3.14 by 3 squared so you just put it in the calculator as A=3.14*3^2 and you get 28.26 hope this helped
ANSWER
(C) d=1
EXPLANATION
The given equation is

Factor the first fraction to get,

Multiply through by (d+2)(d-4)

Expand:




divide both sides by -2

Speed is simply some number with some unit of speed at the end while velocity is speed with a direction.
The skydiver's velocity is 212 miles per hour downward.
The skydiver's speed is 212 miles per hour
Area of the rectangular mat = 12 x 4 = 48 in²
Area of the 3 circles = 3( πr²) = 3(3.14 x 2²) = 37.68 in²
P(landing in a circle) = 37.68/48 = 157/200 = 0.79 (nearest hundredth)
Answer: The probability of landing in one of the circles is 0.79.