A circular hot spring has a diameter of 76 meters. Over time, the diameter of the spring decreases by 4 meters. By how many square meters does the area of the hot spring decrease? Use 3.14 for Pi.
( ANSWER QUICK , had to repost since yall aint responding )
And the answer has to be in centimeters.

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a.the profit when the unit price is equal to 0b.the unit price(s) when the profit is equal to 0c.the profit when the unit price is greatestd.the unit price(s) when profit is greatest