A ball thrown vertically upward at a speed of v ft/sec rises a distance d feet in t, given by `d=6+vt-16t^{2}.` Write an equation whose solution is: a. The time it takes a ball thrown at a speed of 88 ft/sec to rise 20 feet.

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

Simplify the rational expression. state any restrictions on the variable. t^2-4t-12 / t-8 the / is a fraction sign.