What is the answer for (1/4)^-2 -(5^0 x 2) x 1^-1

Factor and solve to find roots x squared -x - 90 =0

Aplane is flying at 32,500 feet. it needs to rise to 36,000 feet in two stages.• in stage 1, it rises 5% of its initial altitude of 32,500 feet.• in stage 2, it rises at a rate of 125 feet per minute.how many minutes does it take for the plane to rise during stage 2?

If the average of x,y and z is 15 what is their sum