Families often require the services of _______ to best meet their family needs or the specific needs of their child. A. public l
1 answer:
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Answer:
Explanation:
We can see from the question that
and
% of
=>
from the question % of
Substituting this into the equation
=>
From the equation above
Answer:
12.5 ft/s
Explanation:
Height of person = 6 ft
height of lamp post = 10 ft
According to the question,
dx / dt = 5 ft/s
Let the rate of tip of the shadow moves away is dy/dt.
According to the diagram
10 / y = 6 / (y - x)
10 y - 10 x = 6 y
y = 2.5 x
Differentiate both sides with respect to t.
dy / dt = 2.5 dx / dt
dy / dt = 2.5 (5) = 12.5 ft /s
