Express the number in scientific notation.0.0000004
A. 4 × 10-6
B. 4 × 10-8
C. 4 × 10-7
D. 4 × 10-9
Answer: C
Mathematics
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Find dy/dx without eliminating the parameter.x = 5t2, y = 
t3; t ? 0
A. 
t
B. 
t
C. 
t2
D. 
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Use addition to check the subtraction problem. If the answer is incorrect, find the correct answer.
37
A. Incorrect; should be 35 B. Correct C. Incorrect; should be 26 D. Incorrect; should be 36
Mathematics
Find the measure of the indicated angle. The figure is not drawn to scale.Find the measure of ?x.
A. 47° B. 127° C. 37° D. 143°
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Find the mode or modes (if any).20, 23, 46, 23, 49, 23, 49
A. 46 B. 23 C. 49 D. 33.3
Mathematics