Evaluate 
using the summation formulas and properties.
A. 
B. 
C. 
D. 
E. 
Answer: E
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Evaluate the expression.(-16)(-9)
A. 144 B. 7 C. -7 D. -144
Solve the problem.In 1992, the population of a country was estimated at 5 million. For any subsequent year, the population, P(t) (in millions), can be modeled using the equation 
where t is the number of years since 1992. Determine the year when the population will be 39 million.
What will be an ideal response?
Solve the problem.The resistance of a wire varies directly as the length of the wire and inversely as the square of the diameter of the wire. A 20 foot length of wire with a diameter of 
has a resistance of 
What would the resistance be for a 
length, with diameter 
of the same kind of wire ?
A. 653 ohms B. 657.5 ohms C. 672 ohms D. 660 ohms
Solve the problem.The table below shows the results of a consumer survey of annual incomes in 100 households. 
What is the probability that a household has an annual income less than $25,000?
A. 0.58 B. 0.22 C. 0.69 D. 0.31