8 short answer calc questions
1.
Write 
as a definite integral. (10 points)
2.
Find 
. (10 points)
3.
Find the area bounded by the curves y2 = 2x + 6 and x = y + 1. Your work must include an integral in one variable. (10 points)
4.
Write the integral in one variable to find the volume of the solid obtained by rotating the first-quadrant region bounded by y = 0.5x2 and y = x about the line x = 3. (10 points)
5.
A rock is thrown upward with a speed of 48 feet per second from the edge of a cliff 400 feet above the ground. What is the speed of the rock when it hits the ground? Use acceleration due to gravity as -32 feet per second squared and approximate your answer to 3 decimal places. (10 points)
6.
Use the mid-point rule with n = 4 to approximate the area of the region bounded by y = x3 and y = x. (10 points)
7.
Electricity is consumed between the hours of midnight (t = 0) and 6 a.m. (t = 6). Selected values of the rate of consumption are shown in the table below, with t measured in hours past midnight, and R(t) measured in KW per hour. Use 4 trapezoids to estimate the total amount of electricity to the nearest KW consumed between midnight and 6 a.m. (10 points)
| t (hours) | 0 | 1 | 2 | 5 | 6 |
|---|---|---|---|---|---|
| R(t) KW/hr | 400 | 200 | 350 | 200 | 150 |
8.
Show that the function 
is constant on the interval (0, +∞). (10 points)
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