Chapter 9.4, Problem 12E

Vectors t = 3i + 7j, u = 2i − 5j, and v = −21i + 9j are given.Part A: Find the angle between vectors t and u. Show all necessary calculations. Part B: Choose a value for c, such that c > 1. Find w = cv. Show all necessary work.Part C: Use the dot product to determine if t and w are parallel, orthogonal, or neither. Justify your answer.

A small company of science writers found that its rate of profit (in thousands of dollars) after t years of operation is given by P'(t) = (5t + 15) (t² + 6t+9) ³. (a) Find the total profit in the first three years. (b) Find the profit in the sixth year of operation. (c) What is happening to the annual profit over the long run? (a) The total profit in the first three years is $ (Round to the nearest dollar as needed.)

Find the area between the curves. x= -2, x = 7, y=2x² +3, y=0 Set up the integral (or integrals) needed to compute this area. Use the smallest possible number of integrals. Select the correct choice below and fill in the answer boxes to complete your choice. A. 7 [[2x² +3] dx -2 B. [[ ] dx+ -2 7 S [ ] dx The area between the curves is (Simplify your answer.)

The rate at which a substance grows is given by R'(x) = 105e0.3x, where x is the time (in days). What is the total accumulated growth during the first 2.5 days? Set up the definite integral that determines the accumulated growth during the first 2.5 days. 2.5 Growth = (105e0.3x) dx 0 (Type exact answers in terms of e.) Evaluate the definite integral. Growth= (Do not round until the final answer. Then round to one decimal place as needed.)

Find the total area of the shaded regions. y 18- 16- 14- 12- 10- 8- 6- y=ex+1-e 4- 2- 0- 2 3 4 5 -2 -4- X ☑ The total area of the shaded regions is (Type an integer or decimal rounded to three decimal places as needed.)

The graph of f(x), shown here, consists of two straight line segments and two quarter circles. Find the 19 value of f(x)dx. 小 Srxdx. 19 f(x)dx y 7 -7 2 12 19 X ☑

Can you solve this two numerical method eqn and teach me.

Find the area between the following curves. x=-4, x=2, y=ex, and y = 3 - ex Set up the integral (or integrals) needed to compute this area. Use the small (Type exact answers in terms of e.) 3 In 2 A. S √ [3-2e*] dx+ -4 2 S [2ex-3] dx 3 In 2 B. dx Find the area between the curves. Area = (Type an exact answer in terms of e.)

Use the definite integral to find the area between the x-axis and f(x) over the indicated interval. Check first to see if the graph crosses the x-axis in the given interval. f(x)=8-2x²: [0,4] Set up the integral (or integrals) needed to compute this area. Use the smallest possible number of integrals. Select the correct choice below and fill in the answer boxes to ○ A. dx B. 2 S 8-2x² dx+ 4 S 2 8-2x2 dx C. dx + S dx For the interval [0,4], the area between the x-axis and f(x) is (Type an integer or a simplified fraction.)