A water rocket is launched off the ground at an initial velocity of 20 feet per second. Which of the following can be used to model the flight of the water rocket?
a. h(t)=-16t^{2}+20t+20
b. h(t)= 16t^2+20t
c. h(t)=-16t^2+20
d. h(t)=-16t^2+20t+40

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.