What is the perimeter for the polygon

Amarathon runner jogging at a constant speed for 45 minutes is it proportional to time or not

Evaluate the integral. (sec2(t) i t(t2 1)8 j t7 ln(t) k) dt

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?