An alloy contains 26 % of copper. What quantity of alloy is required to get 260 g of copper?

The quadratic function h(t) = -16.1t^2 + 150 models a balls height, in feet, over time, in seconds, after its dropped from a 15 story building. from what height in feet was the ball dropped?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0