Solve the problem.A nuclear scientist has a sample of 
of a radioactive material which has a half-life in hours. She monitors the amount of radioactive material over a period of a day and obtains the following data. Use a graphing utility to fit an exponential function to the data. Predict the amount of material remaining at 40 hours.
.
A. y = 86e-0.071x, 5.0 mg
B. y = 100e-0.077x, 4.6 mg
C. y = 92e-0.0686x, 5.9 mg
D. y = 100e-0.077x, 6.7 mg
Answer: B
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Find the indicated term for the geometric sequence with first term, a1, and common ratio, r.Find a6, when a1 = 17, r = 
.
A. 
B. 
C. 
D. 20
What is PO in dBm when PO = 4.2 W.
a. 1.7 dBm b. 3.6 dBm c. 4.2 dBm d. 20.9 dBm e. 36.2 dBm
Solve the problem using the elimination method.There were 550 people at a play. The admission price was $2 for adults and $1 for children. The admission receipts were $810. How many adults and how many children attended?
A. 290 adults and 260 children B. 260 adults and 290 children C. 145 adults and 405 children D. 202 adults and 348 children
Convert to rectangular coordinates.
A. (-1, 
)
B. (1, 
)
C. (
, -1)
D. (- 
, 1)