S=4π<span>r<span>2 - this is the equation for the surface area of a sphere. We know that the radius (r) is 3.5 so here's how to solve this:
S = 4</span></span><span>π r2
S = 4</span><span>π (3.5)2
S = 4</span><span>π 12.25
S = 49</span><span>π
The surface area of a sphere with radius of 3.5 is 49</span><span>π.</span>
Divide by 100. 350/100=3.5 which is 3 and 1/2
His error is he forgot the 2 in 2 3/4
Answer:
13
Step-by-step explanation:
You find out what is one percent then multiply from there