Evaluate the algebraic expression for the given value or values of the variables.

$$- x ^ { 2 } - 11 ; \quad x = - 3$$

To simulate space travel, NASA's Lewis Research Center in Cleveland uses a 430-foot shaft. The free fall of an object in the shaft takes 5 seconds to travel the 430 feet. Write an integer to represent the change in the height of the object.

Find the amount in the account for the given principal, interest rate, time, and compounding period. P = $1,000, r = 2.8%. t = 5 years; compounded continuously

When an automobile air bag deploys, solid sodium azide decomposes rapidly to produce nitrogen gas, and this gas inflates the bag. What is the molar mass of sodium azide $\left(\mathrm{NaN}_3\right)$ ?

Use Separation of Variables to find the general solution.

$$\frac { d x } { d t } = t \tan x$$

For a perfectly competitive increasing-cost industry, an increase in demand will cause the price to A. rise and the cost of inputs to fall. B. rise and the cost of inputs to rise. C. fall and the cost of inputs to fall. D. fall and the cost of inputs to rise. E. remain constant and the cost of inputs to rise.

If one root of a polynomial equation with real coefficients is 4 + 2i, is it certain that 4 - 2i is also a root of the equation? Explain.

Work cooperatively. Use a graphing calculator to find where each pair of graphs intersect.

$$\begin{array}{l}{2 x+4 y=4} \\ {x+3 y=13}\end{array}$$

Put the following in order, from smallest and simplest, to largest and most complex, and describe their individual roles in homeostasis: organ, molecule, organelle, atom, organ system, tissue, organism, cell, macromolecule.

Solve.

$$2 x ^ { 2 } - 2 = 48$$

Write the value of the underlined digit.

$$598,\underline{1}02$$

Graph the numbers in this sequence on a number line.

$$\ldots , - 15 , - 10 , - 5,0,5,10,15 , \dots$$

Write each expression without a fraction bar.

$$\frac { a ^ { 9 } b ^ { 3 } } { a ^ { 7 } b ^ { 8 } }$$

Describe the following sets. B'∩C