Multiply and simplify. Assume that all variables represent positive real numbers.
? 
A. 4xy8
B. 4xy4
C. 4y4
D. 2xy4
Answer: B
Mathematics
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Solve the problem.The specific gravity s of a sphere of radius r that sinks to a depth h in water is given by s = 
.Find the depth to which a spherical buoy of radius 4.2 cm sinks if s = 0.50. Round your answer to the nearest hundredth.
A. 15.67 cm B. 4.2 cm C. 11.47 cm D. 3.07 cm
Mathematics
Sketch the level curves of the function corresponding to the given values of z.
?
; 
?
A. ?
B. ?
C. ?
D. ?
Mathematics
Refer to the figure. 
Mathematics
Solve the problem.The price of a necklace is $9.99. If the salesperson's rate of commission is 11%, how much commission is earned on the sale of the necklace? Round your answer to the nearest cent.
A. $11.09 B. $1.10 C. $10.99 D. $1.11
Mathematics