A football is kicked into the air. Its height above the ground changes according to the equation y --16x2 + 80x +3, where x = time in seconds and ) = height in feet. The ball reaches a height of 67 feet twice: once on the way up and once on the way down. How much time does the ball spend at or above a height of 67 feet?

The sum of two numbers is 86, and their difference is 20. find the two numbers

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jamie pay at the end?

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.