A bear was seen near a campground. Searchers were dispatched to the region to find the bear. a. Assume the bear can walk in any direction at a rate of 2 miles per hour. Suppose the bear was last seen 4 hours ago. How large an area must the searchers cover? Use 3.14 for $\pi$. Round your answer to the nearest square mile. b. How much additional area would the searchers have to cover if the bear were last seen 5 hours ago?

You are mixing x grams of ingredient A and y grams of ingredient B. Choose the equation or inequality that models the given requirement. There should be at least 3 more grams of ingredient A than ingredient B. (A) $3 x-y \leq 0$, (B) $x-3 y \geq 0$, (C) $x-y \geq 3$, (D) $3 x-y \geq 0$.

The percentage p(t) of children who can speak in sentences of five or more words by the age of t months can be approximated by the equation $p(t)=100\left(1-\frac{5.27 \times 10^{17}}{t^{12}}\right) \quad(t \geq 30)$ a. Give a technology formula for p. b. Graph p for $30 \leq t \leq 45$ and $0 \leq p \leq 100$. c. Create a table of values of p for t=30, 31, ..., 40 (rounding answers to one decimal place). d. What percentage of children can speak in sentences of five or more words by the age of 36 months? e. By what age are 75% or more children speaking in sentences of five or more words?

Find the greatest common factor of the numbers. Then tell whether the numbers are relatively prime.

$$\begin{array} { c } {\text { calculate } \mu \text { and } \sigma , \text { where } \sigma \text { is the standard deviation} } \\ { \sigma ^ { 2 } = \int _ { - \infty } ^ { \infty } ( x - \mu ) ^ { 2 } p ( x ) d x } \end{array}$$

$$p ( x ) = \frac { 1 } { \pi \sqrt { 1 - x ^ { 2 } } } \quad \text { on } ( - 1,1 )$$

What nominal interest rate per year is equivalent to 11.5% per year, compounded monthly?

Air is expanded in an adiabatic turbine of 90 percent isentropic efficiency from an inlet state of 2800 kPa and $400^{\circ} \mathrm{C}$ to an outlet pressure of 150 kPa. Calculate the outlet temperature of air, the work produced by this turbine, and the entropy generation.

A cubic polynomial function f has leading coefficient 2 and constant term 7. If f(1)=7 and f(2)=9, what is f(-2)? Explain how you found your answer.

Evaluate the expression when x = 2.

$$6 x + 8$$

A hot-air balloon is flying at a height of 600 feet and is directly above the Marshall Space Flight Center in Huntsville, Alabama. The pilot of the balloon looks down at the airport that is known to be 5 miles from the Marshall Space Flight Center. What is the angle of depression from the balloon to the airport?

Expand each expression. (4+2x)(4-2x)

Sketch the asymptotes and the graph of each equation. $y=\frac{1}{x-3}+4$

Reconstruct the table using the two categorical variables "letter listed first (S or Q)" and "ordering of letter chosen (listed first or second).”

You are examining a free-living animal that has a thin, solid body with two surfaces. Into what phylum is this organism classified? Explain.