Simplify.
- 
+ 
A. 
B. 
C. 
D. 
Answer: B
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Perform the indicated operation.
A. - 
B. 
C. 
D. 
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
Determine the slope and the y-intercept for the linear equation. Graph the line.y = 3x
A. m is undefined, no y-intercept
B. m = 0, y-intercept: (0, 3)
C. m = 3, y-intercept: (0, 0)
D. m = 
, y-intercept: (0, 0)
Graph the circle whose radius is r and whose center is (h, k). r = 2; (h, k) = (0, 1)
A. 
B. 
C. 
D. 