The functions s(t) = - 16t ^ 2 + 64t + 115mc models a ball's height, in feet above the ground, seconds after the ball is thrown vertically upward. Find the maximum height attained by the ball. The maximum height is Need help ASAP

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

If there is no real number solution to the quadratic equation x^2+2x+c=0 what is a possible value of c? 1 -2 0 3

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits