Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 640t. after how many seconds does the projectile take to reach its maximum height?

What is the effect on the graph of the parent function f(x) = x when f(x) is replaced with 3f(x)? a) shifts the line 3 units up b) shifts the line 3 units down c) increases the slope of the line by a factor of 3 d) decreases the slope of the line by a factor of 3

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)