[Video] Q18: H(t)=-16t^2+48t+72if air resistance is ignored, the function h defined above models the height above ground, in feet, of a toy rocket f seconds after it is launched from the roof of building. based on the model, what is the height above ground, in feet, of the toy rocket 1 second after launch?

Explanation for Question 18 From the Math (No Calc) Section on the 2019 May Sat

Question 18 says if air resistance has ignored the function H defined 2 above models, the height above ground in feet of a toy rocket T seconds, 3 after it is launched in the roof of a building based on the model, 4 what is the height above ground in feet of the toy? 5 Rocket one second after launch. 6 So we know here that T represents seconds and that we're trying to find 7 the height one second after launch, 8 which means, which means that all we have to do is plug in one 9 for T here. So negative 16 times one squared is just 10 times one, which is just negative 16 plus 48 times 11 one is just 48 plus 72. 12 And when you add that altogether, that equals 104, 13 which is your final answer.