Calculate.7.75 ÷ (-0.5)
A. -155
B. -15.5
C. 155
D. 15.5
Answer: B
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Provide an appropriate response.Convert 3 miles to feet using a conversion factor.
A. 5,280 feet B. 1,760 feet C. 15,840 feet D. 7,040 feet E. none of the above
Find the least common multiple (LCM) of the pair of numbers.6 and 21n2
A. 42n2 B. 3 C. 126n2 D. 27n2
Evaluate the factorial expression.
A. 40 B. 20 C. 10 D. 120
Solve the problem.In 1990, the population of a country was estimated at 4 million. For any subsequent year the population, P(t) (in millions), can be modeled by the equation 
where t is the number of years since 1990. Estimate the year when the population will be 21 million.
A. approximately the year 2016 B. approximately the year 2093 C. approximately the year 2088 D. approximately the year 2041