Give the focus, directrix, and axis for the parabola.y2 = 40x
A. (10, 10), x = 10, x-axis
B. (10, 0), x = -10, y-axis
C. (10, 0), x = -10, x-axis
D. (0, 10), y = -10, y-axis
Answer: C
Mathematics
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Find the derivative.s = t7 tan t - 
A. 
= 7t6 sec2 t - 
B. 
= t7 sec2 t + 7t6 tan t - 
C. 
= t7 sec t tan t + 7t6 tan t - 
D. 
= - t7 sec2 t + 7t6 tan t + 
Mathematics
Determine the place value of the digit 3 in the whole number.30,500,421
A. ten-thousands B. millions C. ten-millions D. tens
Mathematics
Use the Laws of Exponents to simplify. Write the answer with positive exponents. All variables are nonzero.(x-6)7
A. -7x6
B. -7x42
C. 
D. - x42
Mathematics
Evaluate the logarithm.log9
A. -3 B. 81 C. 3 D. -81
Mathematics