Answer:
2.5 seconds.
Step-by-step explanation:
Find the value of t when the height is 28 feet:
-16t^2 + 56t + 4 = 28
-16t^2 + 56t - 24 = 0
-8(2t^2 - 7t + 3) = 0
-8(2t - 1)(t - 3) = 0
t = 0.5, 3 seconds.
So on the upward journey the rock is at 28 feet at 0.5 second after the throw and at 3 seconds it is at 28 feet again while it is falling back.
Therefore the period when it is at least 28 feet above the ground is 3.0 - 0.5 = 2.5 seconds.
Answer:
-5, 6 when you reflect over the x axis you have to flip the sign of the y point.
Answer:
6
Step-by-step explanation:
multiply all numbers by 18
1,6,36,216,1296,7776
6×1=36
6×6=36
6×36=216
6×216=1296
6×1296=7776
6×n=...............
Answer:
54
Step-by-step explanation:
The numbers are 54, 56 and 58 because 54 + 56 = 110 and 58 + 110 = 168. So lead to 54 being the smallest of the three.
