Sphere Surface Area = <span> 4 • <span>π <span>• r²
</span></span></span>
<span>Sphere Surface Area = <span> 4 * 4^2 * PI
</span></span>
<span>Sphere Surface Area = <span> </span></span>64 * PI square feet
That answer in your list should say 64.00 * PI ft^2
Y = 20x
y • x = 180
180/x = y
180/x = 20x
180 = 20x^2
x^2 = 6
x = + or - 3
Therefore y must equal + or - 60.
1) you would need to turn both fractions so they have a common denominator, that would be 2 2/4 and 3/4
2) then subtract : 2 2/4 - 3/4, and you would subtract numerators and the whole number, but you keep the denominator the same. However, you cannot subtract 2 and 3 in this case, so you need to change 2 2/4 to 1 5/4 (they are still equivalent)
3) 1 5/4 - 3/4 = 1 2/4, which simplified version is 1 1/2
Therefore, the answer is 1 and 1/2