Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 200e-0.227t, where t is the time in years? Round to the nearest hundredth year.
A. 23.34 yr
B. 3.05 yr
C. 45.40 yr
D. 26.39 yr
Answer: B
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Perform the indicated operation.(5n7 - 14n5 - 10) - (-10n5 + 7n7 - 2)
A. -2n7 - 7n5 - 12 B. -2n7 - 4n5 - 12 C. -2n7 - 4n5 - 8 D. -14n12
Express as a product of prime factors.2600
A. 23 ? 52 ? 13 B. 2 ? 54 ? 13 C. 23 ? 53 ? 13 D. 24 ? 5 ? 13
Identify the group of terms as like or unlike.8, 15, -12
A. Like B. Unlike
Solve the problem.The graph below shows the average retail price of the least-expensive DVD player available at Mega Mart over the past few years. Average Retail Price of Least Expensive DVD Player
a. Use the two points whose coordinates are given to find the slope-intercept form of an equation that models the data.b. Use the equation from part (a) to predict the price of the least expensive DVD player in 2007.
A. a. y = -25x + 194 b. $19 B. a. y = -25x + 56 b. $94 C. a. y = -25x + 56 b. $119 D. a. y = -25x + 194 b. $44