According to fundamental theorem of algebra, how many roots exist for the polynomial function f(x)=( x^3-3x+1)^2

Standard deviation of 19,29,21,22,23

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.