Find the requested area or volume.Area of a rectangle: Length = 13 m, width = 1
m
A. 20
m2
B. 3
m2
C. 10
m2
D. 3 m2
Answer: A
Mathematics
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Express the sum using summation notation. Use a lower limit of summation, not necessarily 1, and k for the index of summation.33 + 43 + 53 + . . . + 93
A. 
B. 
C. 
D. 
Mathematics
Use the appropriate sum or difference identity to write the given expression as a function of x alone.cos (90° + x)
A. cos x B. -sin x C. -cos x D. sin x
Mathematics
Solve the system of equations by the substitution method.
A. (-1, 10) B. no solution C. (1, 9) D. (0, 10)
Mathematics
Find the mean. Round to the nearest tenth unless otherwise stated.Number of days spent working out in a month: 20, 9, 18, 10, 15, 10, 3, 3
A. 12.57 B. 23 C. 10 D. 11
Mathematics