Find the value of k so that the graph of the equation has the given y-intercept. y = − 1 /3x + 5/6 k; b = −10
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Answer:
C
Step-by-step explanation:
Using the law of cosines then cosΘ is the following quotient
cosΘ =
where a = 5.8, b = 10.5 and c = 10.9
cosΘ =
=
= = 0.21 → C
h(t) is the height of the diver in feet above the water
Now it asks about the time at which diver reaches the water
When diver reaches the water , the height of diver from water should be zero
So we plug h(t) =0
So
divide whole equation by -16
we can now factor the quadratic equation
So we get
(t+4)(t-3) =0
plug each factor equal to zero and solve for t
t+4 =0 and t-3 =0
So t=-4 and t=3
Now time cannot be negative , So t=3
So time = 3 seconds
It takes 3 seconds for the diver to reach the water