A circular vent pipe is placed on a flat roof. a. Write an equation of the circular cross section that the pipe makes with the roof. Assume that the origin is placed at the center of the circle. b. Now suppose that the pipe is placed on a roof with a slope of 3 5 . What shape will the cross section of the pipe form with the plane of the roof? c. Determine the length of the major and minor axes. Find the exact value and approximate to 1 decimal place if necessary.
A circular vent pipe is placed on a flat roof. a. Write an equation of the circular cross section that the pipe makes with the roof. Assume that the origin is placed at the center of the circle. b. Now suppose that the pipe is placed on a roof with a slope of 3 5 . What shape will the cross section of the pipe form with the plane of the roof? c. Determine the length of the major and minor axes. Find the exact value and approximate to 1 decimal place if necessary.
Solution Summary: The author explains the equation of the circular cross section that the pipe makes with the flat roof.
(b) Find the (instantaneous) rate of change of y at x = 5.
In the previous part, we found the average rate of change for several intervals of decreasing size starting at x = 5. The instantaneous rate of
change of fat x = 5 is the limit of the average rate of change over the interval [x, x + h] as h approaches 0. This is given by the derivative in the
following limit.
lim
h→0
-
f(x + h) − f(x)
h
The first step to find this limit is to compute f(x + h). Recall that this means replacing the input variable x with the expression x + h in the rule
defining f.
f(x + h) = (x + h)² - 5(x+ h)
=
2xh+h2_
x² + 2xh + h² 5✔
-
5
)x - 5h
Step 4
-
The second step for finding the derivative of fat x is to find the difference f(x + h) − f(x).
-
f(x + h) f(x) =
= (x²
x² + 2xh + h² -
])-
=
2x
+ h² - 5h
])x-5h) - (x² - 5x)
=
]) (2x + h - 5)
Macbook Pro
Evaluate the integral using integration by parts.
Sx² cos
(9x) dx
Let f be defined as follows.
y = f(x) = x² - 5x
(a) Find the average rate of change of y with respect to x in the following intervals.
from x = 4 to x = 5
from x = 4 to x = 4.5
from x = 4 to x = 4.1
(b) Find the (instantaneous) rate of change of y at x = 4.
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