How many tenths are in 13.58

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

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

Can someone check if i did this correct. it’s number 4 if you’re wondering.