Find the first term and the common ratio of the geometric sequence.3, 
, 
, 
, 
, . . .
A. a1 = 3, r = 4
B. a1 = 3, r = 
C. a1 = 
, r = 
D. a1 = 
, r = 10
Answer: B
Mathematics
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Find the unknown number in the proportion. Round answer to the nearest hundredth when necessary.
= 
A. x = 0.4 B. x = 6.88 C. x = 5.6 D. x = 31.5
Mathematics
Express the number in scientific notation.65,000
A. 6.5 × 105 B. 6.5 × 104 C. 6.5 × 10-4 D. 6.5 × 10-5
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Solve the problem.If the mass of an object is 2.43984 × 102 tons and its volume is 3.12 × 103 cubic feet, find the density of this object. (Use the formula D = 
.)
A. 7.82 × 10-3 tons per cubic foot B. 78.2 × 10-2 tons per cubic foot C. 7.82 × 10-1 tons per cubic foot D. 7.82 × 10-2 tons per cubic foot
Mathematics
Solve the initial value problem.
= cot x, y(-2) = 9
A. y = -
+ 9
B. y = 
+ 9
C. y = 
+ 9
D. y = 
+ -2
Mathematics