3x +6, if x so (8 pts) 5. Sketch the graph of f(x)= 1 *+3, ifr>0 (9 pts) 6. The number of grams Q of a substance after 7 hours is given by Q=Qe6291How long will it take for 100 grams of the substance to decay to 60 grams? Round your answer to 3 decimal places. [1 27 (9 pts) 7. Find A ', by hand, if A = 1 2 5 -1 1 2
please answer both problems. 3x + 6, if x < 0 5. Sketch the graph of f(x) = { 1 -= x+3, if x > 0 ,-0.2371 6. The number of grams Q of a substance after t hours is given by Q=Qoe How long will it take for 100 grams of the substance to decay to 60 grams? Round your answer to 3 decimal places.
Identify the correct graph of the following piecewise-defined function. -3x - 6 ifx-2 if x > -2 8(x) = Answer 2 Points
Graph the function and find f(0) 13 Graph fx)-x -2, ifxs-1 2 x, ifx >-1 8-6 4 2 2 4 6 8x -2 -6 -8
5. (6 pts.) Suppose the random variable X has probability density function ()if 0, ifx<0. Find the mean and variance of X. Write the equation one needs to solve to find the median m of X. Do not solve the equation, but at least simplify it enough so that it does not involve any integrals.
6. (10 pts) Use calculus to sketch the graph of f(x) = 6.5-3x Show clearly the (x, y) coordinates of all (-) and x +0. You must show local max, local min, and inflection points. Show clearly the behavior as x ALL work that justifies the shape of your graph.
(+3) The pdf f(x) of a random variable X is given by 0, ifx<0 Find the cumulative distribution function F(r
Sketch the graph of a function f having the given characteristics. f(3) = f(9) = 0 f'(6) = f'(8) = 0 f'(x) > 0 for x < 6 f'(x) > 0 for 6 < x < 8 f'(x) < 0 for x > 8 f"(x) < 0 for x < 6 or x > 7 f"(x) > 0 for 6 < x < 7
f. g(f(x)) 5) Solve the system of equations (4.1) (5x + 4y = 7 (2x + 7y=-8 6) Graph the inequality 3x + 5y > 30. (5.1) 7) Graph the system of linear inequalities (5.2) 3x + 2y = 22 (5x + 7y = 55 8) Find the value of an investment in an account (2.5, 3.1, 3.2) a. Bearing 4% simple interest after 5 years.
Sketch a graph of a function f having the given characteristics. f(0) = f(8) = 0 f'(x) < o if x < 4 f'(4) = 0 f'(x) > 0 if x > 4 f"(x) > 0