Question

MEDAL $ U _A ball is thrown into the air with an initial upward velocity of 60 ft/s. Its height(H) in feet after t seconds is given by the function h=-16t2+60t+6.What will the height be at t=3 seconds?
1.35 ft
b.40ft
c.42ft
d. 45ft

Answer 1

Sub t=3 in the equation, we have:
h=-16(3^2)+(60x3)+6 = -144+180+6 = 42ft

So the answer should be C.

Answer 2

I have one more , could you help ?

Answer 3

One more rectangular shaped piece of metal siding needs to be cut to cover the exterior of a pole barn. The area of the piece is 30 FT 2. The lenght is 1 less than 3 times the width.How wide should the medal piece be ? Round to the nearest hundredth of a foot .
a. 3.33 ft
b.4.3 ft
c.1 ft
d.30 ft

Answer 4

a?

Answer 5

Let the width be x. Then the length will be 3x -1.
So the area would be x(3x-1) = 3x^2-x=30 ft^2.

We thus have the equation 3x^2 - x - 30 = 0.
Using the quadratic formula, we would have
x = 3.33 ft.
The correct answer is thus A.

Answer 6

YEs I got it right ! Ty

Answer 7

You're welcome

Answer 8

Your a def pro. If you ever need help in any subjects outside of math I could help u too. I get straight a's

Answer 9

I'm posting 5 more examples on the math Board if you would like to catch some more medals