The table shows the number of fiber-optic cable connections to homes in the U.S. from 2000-2004 (
represents 2000).Use technology to obtain the linear regression line, with regression coefficients rounded to two decimal places.
Year t 0 1 2 3 4Connections c (Thousands) 0 10 25 64 145?
A. 
B. 
C. 
D. 
E. 
Answer: D
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A certain radioactive substance decays exponentially with yearly decay factor of 0.96. There are initially 103 grams present. ? A: Write a formula that gives the amount A, in grams, of the substance remaining after t years. ? B: How much is left after 7 years? Round your answer to two decimal places. ? C: Plot the graph of A versus t over the first 20 years. ? D: How long will it take until only 26 grams are left? Round your answer to two decimal places.
What will be an ideal response?
Solve the problem.A condominium association is holding an election for president of the board of directors. Each member ranks the candidates. The preference schedule below shows the results of the ballots with candidates Abbott (A), Blake (B), Cleary (C), and Downs (D).
Determine the winner using the Borda count method.
A. Blake B. Abbott C. Downs D. Cleary
Write the number in scientific notation.In a certain city, the bus system carried a total of 18,200,000,000 passengers.
A. 1.82 × 1011 B. 1.82 × 1010 C. 1.82 × 109 D. 18.2 × 1010
Perform the indicated operation. Express the answer in scientific notation.
A. 4 × 107 B. 4 × 1011 C. 8 × 1011 D. 8 × 107