Find v ? u.v = 4i - 4j and u = -7i + 9j
A. -3i + 5j
B. 8
C. -64
D. -28i - 36j
Answer: C
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Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = +1; local maximum at x =-1; concave up on (0, ?); concave down on (-?, 0) B. Local minimum at x = +1; local maximum at x =-1; concave down on (0, ?); concave up on (-?, 0) C. Local maximum at x = +1; local minimum at x =-1; concave up on (0, ?); concave down on (-?, 0) D. Local maximum at x = +1; local minimum at x =-1; concave up on (-?, ?)
Find the area of the circle with the given radius or diameter. Use ? ? 3.14.r = 8.5 in.
A. A ? 907.46 in.2 B. A ? 106.76 in.2 C. A ? 53.38 in.2 D. A ? 226.865 in.2
Solve the problem.A meteorologist in the Upper Peninsula of Michigan predicts an overnight low of 
Fahrenheit. What would a Canadian meteorologist predict for the same location in Celsius?
A. -3.9° B. -39° C. -7° D. -21.7°
Multiply and simplify.
? 
A. 5m
B. 
C. 
D. 10