What is the surface area of a sphere with a circumference of 30 ft? round the answer to the nearest tenth. 286.5 ft^2 143.2 ft^2 71.6 ft^2 22.8 ft^2

The answer is 71.6 ft^2.
It is given that 2πR=30 therefore R=4.77(aprox.)
Now you take the area formula:πR^2 which is equal to 71.6

The answer would he -4,-2 because the points are just on the opposite side. since the x axis is +4 it's going to he -4 and since the y axis is -2 it stays there because whaen rotated it stays in the third quadrant