Find the indicated term of the sequence.The twentieth term of the arithmetic sequence 11, 7, 3, ...
A. -65
B. 87
C. 91
D. -69
Answer: A
Mathematics
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Use the table to find the instantaneous velocity of y at the specified value of x.x = 1. 
A. 0 B. -0.5 C. 1 D. 0.5
Mathematics
Write the first four terms of the geometric sequence with the given values.a1 = 12, r = 
A. 12, 6, 3, 
B. 12, 14, 16, 18
C. 2, 24, 48, 96
D. 12, 3, 
, 
Mathematics
Find the perimeter. Use 3.14 for ?.
A. 42.98 in. B. 31.99 in. C. 49.98 in. D. 38.99 in.
Mathematics
The concentration (in milligrams/cubic centimeter) of a certain drug in a patient's body t hr after injection is given by
?
interval where 
is decreasing.
?
When is the concentration of the drug increasing and when is it decreasing?
?
A. Increasing on 
B. Increasing on 
and decreasing on 
C. Decreasing on 
D. The concentration of the drug is constant.
Mathematics