Solve the given equation for the indicated variable. (Leave ± in the answer, if appropriate)r = 
for A
A. A = 2?r
B. A = ± 
C. A = ± 2?
D. A = 2?r2
Answer: D
Mathematics
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Choose the polar equation that matches the graph.
A. r = 2 cos(?/2) B. r = 2 sin(?/2) C. r = 2 sin(2?) D. r = 2 cos(2?)
Mathematics
Find the first term and the common ratio of the geometric sequence.1, 
, 5, 5
, . . .
A. a1 = 1, r = 
B. a1 = 1, r = 5
C. a1 = 
, r = 5
D. a1 = 
, r = 
Mathematics
Fill in the missing value.457 L = mL
A. 0.457 B. 45.7 C. 45,700 D. 457,000
Mathematics
Solve.A hiking trail is 19,008 meters long. How many kilometers long is the trail?
A. 190.08 km B. 19.008 km C. 1.9008 km D. 1900.8 km
Mathematics