Underline the digit that occupies the given place.68,487,971Millions place
A. 6
,487,971
B. 68,48
,971
C. 68,
87,971
D. 
8,487,971
Answer: A
Mathematics
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Express the number in scientific notation.2500
A. 2.5 × 10-2 B. 2.5 × 10-3 C. 2.5 × 103 D. 2.5 × 102
Mathematics
Use a calculator to evaluate the expression, or state that the value does not exist. Round the answer to four decimal places when necessary.
coth-1 
A. -0.3466 B. -0.1155 C. -0.0252 D. -0.231
Mathematics
Solve the system by substitution.
A. (-4, -13) B. (-13, -4) C. (2, 3) D. (0, 0)
Mathematics
Find the determinant.det 
A. -8 B. 18 C. -66 D. -18
Mathematics