Provide an appropriate response.In scientific notation, what is the largest integer which can be multiplied by a power of 10?

A. -9
B. 10
C. 1
D. 9


Answer: D

Mathematics

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Solve the problem. Round to the nearest tenth of a percent unless otherwise noted. By switching service providers, a family's telephone bill decreased from about  a month to about  What was the percent decrease?

A. 6.4% B. 6% C. 3% D. 7%

Mathematics

Solve by the substitution method.0.2x + 0.9y = -3.2  x - 0.5y = 4

A. ? B. {(0.2, -0.4)} C. {(-4, 2)} D. {(2, -4)}

Mathematics

Solve the problem.Sue can sew a precut dress in 3 hours. Helen can sew the same dress in 2 hours. If they work together, how long will it take them to complete sewing that dress? Give your answer rounded to one decimal place, if necessary.

A. 2.5 hr B. 1.2 hr C. 5 hr D. 1.8 hr

Mathematics

Solve the initial-value problem.

Mathematics