Write the expression in standard form.

A.  - i
B.  - i
C.  + i
D.  - i


Answer: C

Mathematics

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Find the sum of the given infinite geometric series if possible. Write the answer as a decimal number if appropriate.8 - 2 +  -  + . . .

A. 7.1 B. 7.4 C. 5.9 D. 6.4

Mathematics

Solve. = x + 2

A. -4 B. 2 C. 6 D. 4

Mathematics

Simplify.r-3

A. -r3
B.
C. - 
D. r1/3

Mathematics

For the cost function, find the marginal cost at the given production level x. Round your answer to two decimal places. ? ?

A. $9.60 per item B. $9.58 per item C. $10.00 per item D. $9.61 per item E. $10.40 per item

Mathematics