Answer:
4.41seconds later
Step-by-step explanation:
Let the equation of the height reached by the water front be h = -2t^2+7t+4
The water hits the ground at h =0
Substitute
0 = -2t^2+7t+4
-2t^2+7t+4 = 0
2t^2 - 7t - 8 = 0
t = 7±√(-7)²-4(2)(-8)/2(2)
t = 7±√49+64/4
t = 7±√113/4
t = 7±10.63/4
t = 7+10.63/4
t = 17.3/4
t = 4.41s
Hence the water hit the ground 4.41seconda later
Answer:
7
b
Step-by-step explanation:
Answer:
the first one
Step-by-step explanation:
have a great day :D
The total of angle measures in a triangle add up to 180 so take subtract 115 from 180 which = 32.5 so that’s the angles measures to C and B. the length of A is 42+53 which equals 95. So your answers are 32.5 and 95!!