Solve the problem. A wild animal preserve can support no more than 130 elephants. 49 elephants were known to be in the preserve in 1980. Assume that the rate of growth of the population is 
= 0.0007P(130 - P)where t is time in years. Find a formula for the elephant population in terms of t.
A. P = 
where t is the number of years since 1980
B. P = 
where t is the number of years since 1980
C. P = 
where t is the number of years since 1980
D. P = 
where t is the number of years since 1980
Answer: C
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Solve.The power that a resistor must dissipate is jointly proportional to the square of the current flowing through the resistor and the resistance of the resistor. If a resistor needs to dissipate 
of power when 
of current is flowing through the resistor whose resistance is 
find the power that a resistor needs to dissipate when 
/> of current are flowing through a resistor whose resistance is 
A. 35 watts
B. 175 watts
C. 245 watts
D. 210 watts
Either the dimensions of two matrices or the matrices themselves are given. Find the dimensions of the product AB and the product BA. If either is not defined, say so.A is 4 × 4; B is 4 × 4.
A. AB is 8 × 4; BA is 8 × 4. B. AB is 8 × 8; BA is 8 × 8. C. AB is 4 × 8; BA is 4 × 8. D. AB is 4 × 4; BA is 4 × 4.
Evaluate the expression using the order of operations.3 ? 7 - 102
A. 490 B. 679 C. 79 D. -79
Simplify the expression.
A. 
B. y2 + 2y + 4
C. 
D. y2 - 4