Find the angle between u and v in radians.u = -2i - 6j, v = 7i + 6j + 8k
A. -0.70
B. 1.58
C. 1.84
D. 2.28
Answer: D
Mathematics
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Determine the number of figures (of any size) in the design.Triangles (of any size)
A. 10 B. 9 C. 14 D. 12
Mathematics
For the given arithmetic series, what is Sn?a1 = 26, d = 5, and n = 31
A. 3131 B. 12,524 C. 6262 D. 3157
Mathematics
Let Q represents a mass of radioactive radium 
(in grams), whose half-life is 1,599 years. The quantity of radium present after t years is 
. Determine the quantity present after 500 years. Round to the nearest hundredth of a gram, if necessary.
a. 0 g b. 0.31 g c. 0.81 g d. 1.61 g e. 2 g
Mathematics
Use a calculator to evaluate the logarithm.log 0.00566
A. -2.2472 B. -5.1743 C. -2.2549 D. -2.2396
Mathematics