Zach throws a ball upward so that it follows the equation y = -16x² + 64x + 5 where y is the height of the ball
and x is time. How many seconds until the ball reaches its maximum height? Hint: look at its table. (Help ASAP pls)

99 points at a zoo, the leopard pen has a ring-shaped sidewalk around it. the outer edge of the sidewalk is a circle with a radius of 12 m. the inner edge of the sidewalk is a circle with a radius of 8 m. (1 point for showing all of your work) a. write and simplify an expression for the exact area of the sidewalk. (1 point for the answer) b. find the approximate area of the sidewalk. use 3.14 to approximate π. (1 point for the answer)

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

What is the fewest number of full weeks briyana would have to work to have enough money? 8 weeks9 weeks 10 weeks11 weeks