Use the appropriate formula to find the indicated figurate number.the 13th octagonal number
A. O13 = 162.5
B. O13 = 195
C. O13 = 481
D. O13 = 58.5
Answer: C
Mathematics
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Evaluate the line integral along the curve C.
ds , C is the path from (0, 0, 0) to (1, 1, 1) given by:C1: r(t) = ti, 0 ? t ? 1C2: r(t) = i + tj, 0 ? t ? 1C3: r(t) = i + j + tk, 0 ? t ? 1
A. 45 + 3e2 + ln 2 B. 17 + e2 C. 23 + e2 D. 43 + 2e2 + ln 2
Mathematics
Solve the problem.What is the additive inverse of 
?
A. - 
B. - 
C. 
D. - 6
Mathematics
Simplify by writing the expression with positive exponents. Assume that all variables represent nonzero real numbers.
A. 
B. 7r-6
C. 7
D. 7r6
Mathematics
The graph of a function f is given. Use the graph to answer the question.How often does the line y = 2 intersect the graph?
A. once B. does not intersect C. twice D. three times
Mathematics