Find the indicated probability.If you flip a coin three times, the possible outcomes are HHH, HHT, HTH, HTT, THH, THT, TTH, TTT. Find the probability of getting exactly two tails.
A. 
B. 
C. 
D. 
Answer: B
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The amount A, in grams, of a radioactive substance remaining after t years is given by the following table. Use an exponential model for these data to determine the half-life of the radioactive substance. That is, determine how long it takes for half of the substance to decay. Round your answer to two decimal places. t 3 4 5 6 A 157.36 154.21 151.13 148.11?
A. 25.46 years B. 34.50 years C. 34.31 years D. 25.00 years
Give a geometric description of the set of points whose coordinates satisfy the given conditions.y2 + z2 = 2, x = -3
A. The line tangent to the circle y2 + z2 = 2 at the point x = -3
B. The cylinder with the radius 
along the x-axis
C. The circle y2 + z2 = 2 in the plane x = -3
D. All points more than 
units from the origin
Graph the two functions on one coordinate plane.f(x) = 
g(x) = 
- 2
A. 
B. 
C. 
D. 
Decide whether the following is an expression or an equation.6(6x + 2) - 3(3x - 2)
A. Equation B. Expression