Using the variable x, write the interval as an inequality.
A. x < -2 or x > 2
B. -2 ? x ? 2
C. -2 < x < 2
D. x ? -2 or x ? 2
Answer: D
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Find the x-intercept and the y-intercept of the graph of the equation. Do not graph the equation.-3x + y = 3
A. x-intercept = -1; y-intercept = 0 B. x-intercept = -1; y-intercept = 3 C. x-intercept = -2; y-intercept = -3 D. x-intercept = 3; y-intercept = -1
Solve the problem.A wire of length 8x is bent into the shape of a square. Express the area A of the square as a function of x.
A. A(x) = 8x2
B. A(x) = 4x2
C. A(x) = 2x2
D. A(x) = 
x2
Solve the problem.An initial investment of $480 is appreciated for 9 years in an account that earns 14% interest, compounded quarterly. Find the amount of money in the account at the end of the period.
A. $1656.13 B. $1560.94 C. $1600.12 D. $1176.13
Solve.In 1998, the population of Country C was 40 million, and the exponential growth rate was 1% per year. Find the exponential growth function.
A. P(t) = 400.01t , where P(t) is in millions and t is the number of years after 1998. B. P(t) = 40e0.01t, where P(t) is in millions and t is the number of years after 1998. C. P(t) = 40e0.01, where P(t) is in millions and t is the number of years after 1998. D. P(t) = 40e10t, where P(t) is in millions and t is the number of years after 1998.