Find a rectangular equation equivalent to the given pair of parametric equations.x = 2 cos t, y = 5 sin t ; 0 ? t ? 2?
A. 
- 
= 1; -2 ? x ? 2
B. 
- 
= 1; -? < x < ?
C. 
+ 
= 1; -2 ? x ? 2
D. 
+ 
= 1; -2 ? x ? 2
Answer: C
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Solve.A country has a population of 8.7 million in 1995, a growth rate of 1.5% per year, and immigration from other countries of 46,000 per year. Predict the population in the year 2013.[Model the situation by using a differential equation of the form 
= ay + b with 
This differential equation has solution 
A. 11.1 million B. 13.2 million C. 12.3 million D. 11.5 million
Divide.8.32 ÷ 8
A. 2.04 B. 10.4 C. 20.4 D. 1.04
Refer to the weighted voting system 
and the Shapley-Shubik definition of power. (The four players will be called P1, P2, P3, and P4.)In how many sequential coalitions is player P4 pivotal?
A. 6 B. 2 C. 0 D. 1 E. none of these
Perform the operation. Write the answer as a fraction in lowest terms.3
÷ 4
A. 
B. 
C. 
D. 