Find the indicated quantities for the appropriate arithmetic sequence.Find the sum of the first 102 positive multiples of 4.
A. 21012
B. 21218
C. 20604
D. 20808
Answer: A
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Solve the problem.The size of a population of mice after t months is P = 100(1 + 0.2t + 0.02t2). Find the growth rate at months.
A. 152 mice/month B. 176 mice/month C. 38 mice/month D. 76 mice/month
Use the rules for exponents to rewrite the expression and then evaluate the new expression.
A. -14 B. -5 C. 0 D. 1
Provide an appropriate response.Why can't y = 2x have an x-intercept?
What will be an ideal response?
Solve.The sales of typewriters have declined considerably in recent years because of the advent of computers. Assume that there were 22 million typewriters sold in 1980 and 6 million sold in 1990. In addition, assume the sales are decreasing according to the exponential decay model. Find the value k, and write an exponential function that describes the number of typewriters sold after time t, in years. (Round decimals to three places.)
A. k = 0.309; S(t) = 22e-0.309t, where S(t) is in millions and t is the number of years since 1980. B. k = 0.13; S(t) = 22e-0.13t, where S(t) is in millions and t is the number of years since 1980. C. k = 0.179; S(t) = 22e-0.179t, where S(t) is in millions and t is the number of years since 1980. D. k = -0.13; S(t) = 22e-0.13t, where S(t) is in millions and t is the number of years since 1980.