Issac tosses a quarter off of a bridge, creating the shape of a parabola. The parabola can be represented by the equation h=-16t
^2-4t+20
c. How high is the coin after .25 seconds?
d. After how many seconds does it land on the ground?
1 answer:
Answer:
c) 18 units
d) 1 second
Step-by-step explanation:
h = -16t² - 4t + 20
c) t = 0.25
h = -16(0.25)² - 4(0.25) + 20
h = 18
d) -16t² - 4t + 20 = 0
4t² + t - 5 = 0
4t² + 5t - 4t - 5 = 0
t(4t + 5) - (4t + 5) = 9
(4t + 5)(t - 1) = 0
t = -1.25, 1
t = 1 second
You might be interested in
{ solution is attached below}
5t = 25+2r
t = (25+2r)/5 or
t = 5 + (2/5)r
Let the number be x
The sum of 2 equal numbers is simply x+x or 2x.
Answer:
x= -9......................
I got 67 but I can guarantee it’s right
