A telephone wire has a current of $20 \mathrm{~ \mu A}$ flowing through it. How long does it take for a charge of 15 C to pass through the wire?

Solve the equation.

$$( a - 5 ) ^ { 2 } - 4 ( a - 5 ) - 21 = 0$$

Simplify each expression. $2 ^ { 4 } \div 8 + 5$

True or False. Resource prices provide information to producers that allows them to use resources in a way that maximizes their value.

Use the data in the accompanying table and express all results in decimal form.

$$\begin{matrix} \text{ } & \text{Driver Killed} & \text{Driver Not Killed}\\ \text{Seatbelt used} & \text{3655} & \text{7005}\\ \text{Seatbelt not used} & \text{4402} & \text{3040}\\ \end{matrix}$$

Fi nd the probability of randomly selecting a driver and getting one who was

not ki lled given that the driver was using a seatbelt.

Determine whether each statement is true or false. If the statement is falsey make the necessary change(s) to produce a true statement. The functions

$$f ( x ) = 3 ^ { - x } \text { and } g ( x ) = - 3 ^ { x }$$

have the same graph.

Determine whether the statement is true or false. If it is false, explain why or give an example that shows it is false. ∫ sin² 2x cos 2x dx = 1/3sin³ 2x + C

Use prime factorization to subtract these fractions: 1/18 - 1/30

A 4-person leadership committee is randomly chosen from a group of 24 candidates. Ten of the candidates are men, and 14 are women. What is the probability that the committee is all male or all female?

Write the integral as a sum of integrals without absolute values and evaluate.

$$\int _ { 0 } ^ { \pi } | \cos x | d x$$

Fill in each blank so that the resulting statement is true. In order to factor

$$7 x ^ { 2 } - 23 x + 6$$

begin by finding two first terms whose product is _____ and two last terms whose product is _____.

Give equations for ellipses and tell how many units up or down and to the right or left each ellipse is to be shifted. Find an equation for the new ellipse, and find the new foci, vertices, and center.

$$\frac { x ^ { 2 } } { 3 } + \frac { y ^ { 2 } } { 2 } = 1 , \quad \text { right } 2 , \text { up } 3$$

Solve the compound inequality, if possible. Graph the solution set (if one exists) and write it using interval notation.

$$- 6 < f ( x ) \leq 0 \text { where } f ( x ) = 3 x - 9$$

Verify that

$$y _ { 1 } ( x ) = e ^ { x } \cos 2 x , y _ { 2 } = e ^ { x } \sin 2 x , \text { and }y _ { 3 } = e ^ { 3 x }$$

are solutions to the differential equation

$$y ^ { \prime \prime \prime } - 5 y ^ { \prime \prime } + 11 y ^ { \prime } - 15 y = 0$$

and show that

$$\left| \begin{array} { l l l } { y _ { 1 } } & { y _ { 2 } } & { y _ { 3 } } \\ { y _ { 1 } ^ { \prime } } & { y _ { 2 } ^ { \prime } } & { y _ { 3 } ^ { \prime } } \\ { y _ { 1 } ^ { \prime \prime } } & { y _ { 2 } ^ { \prime \prime } } & { y _ { 3 } ^ { \prime \prime } } \end{array} \right|$$

is nonzero on any interval.