Identify where f is increasing or where f is decreasing, as indicated. Round your answer to two decimal places when appropriate.f(x) = x4 - 10x2 + 16; decreasing
A. (-?, -2.83) ? (-1.41, 1.41) ? (2.83, ?)
B. (-2.83, -1.41) ? (1.41, 2.83)
C. (-?, -2.24) ? (0, 2.24)
D. (-2.24, 0) ? (2.24, ?)
Answer: C
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Write the sum without sigma notation and evaluate it.
A. cos 8? + cos 24? = 2 B. cos 8? - cos 16? + cos 24? = - 1 C. -cos 8? + cos 16? - cos 24? = -1 D. cos 8? - cos 16? + cos 24? = 1
For each right triangle, find the missing quantity.Find a. Round to the nearest tenth, if necessary.
c = 15 ydB = 19°
A. a = 5.2 yd B. a = 4.9 yd C. a = 14.2 yd D. a = 71 yd
Solve the system.6w - 2y + z = 20-w + 6x + y - 6z = 164w - x + + 2z = 13 x - 6y - z = -15
A. (-1, 5, 5, -5) B. (4, 1, -3, 0) C. (1, -1, -7, -4) D. (5, -1, 3, -4)
Roderick has an Internet service that charges by the hour. This piecewise function shows the cost of the Internet service based on the number of hours that Roderick uses the Internet.
Last month, Roderick used the Internet for 7.5 hours. What was he charged?
What will be an ideal response?