Round each number to the place of the underlined digit. 3.999 in the tenth place

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?

Y=4x^2+x-1 solve using quadratic formula

For the equations below which statement is true ? -2x=14 6x=-42