Answer:
after 11.07secs
Step-by-step explanation:
Given the height of an object modeled by the equation
H = 16T² - 1960
The height of the object on the surface of water is zero, hence H = 0
Substitute
0 =16T² - 1960
Swap
16T² - 1960 = 0
16T² = 1960
T² = 1960/16
T² = 122.5
T = 11.07
Hence the rock will hit the surface of the water after 11.07secs
Answer:
8
Step-by-step explanation:
compare the divisor x+1 with x-a which will be -1 then use remainder theorem to get your answer
Factor out the common terms in the first two terms, then in the last two terms
x(y - 5) + 2(y - 5)
Factor out the common term y - 5
(y - 5)(x + 2)