Answer:
Step-by-step explanation:
ignore the "at the instant the man is 30 feet away" part, set it as X and the man's shadow as Y.
Similar triangles so we can do 
.
Solve for it we get 44y = 6x
Differentiate relative to time t, we get 44y' = 6x'.
change in x (x') is equal to 5. And we get the answer y' = 
.
the ft/sec is the rate of which the length of the shadow is changing. add 5 to it for the rate of the tip of his shadow moving away from the tower.
Answer:
Bracket open, y raised to the power of three, bracket close, raised to the power of two
OR
In bracket, y raised to the power of three, bracket close, raised to the power of two
Answer:
The answer is 3x^2+7x+2
Step-by-step explanation:
Multiply each term of the second bracket with the first bracket.
We can write:
(x+2)(3x+1)= 3x(x+2)+1(x+2)
By multiplying the terms we get:
=3x^2+6x+x+2
Now simplify by combining like terms:
=3x^2+7x+2
Thus the answer is 3x^2+7x+2....
Answer:
20 weekday hours and 16 weekend hours
Step-by-step explanation:
all u do is take 5 hours and multiple them by 4 weekdays so it gives u 20 hours and then u multiple 8 hours by 2 which is 16 hours
