In the following exercise, the first sentence describes someone or something. Infer information from the first sentence, and then choose the word from the Word Bank that best completes the second sentence. sardonic, emulated, impounded, decorum, austere, collaborated, droll, ambivalent. After Jacob read a biography on Teddy Roosevelt, he began to dress and speak like his hero. From this sentence, we can infer that Jacob _____ Teddy Roosevelt.

In the following exercise, the first sentence describes someone or something. Infer information from the first sentence, and then choose the word from the Word Bank that best completes the second sentence. caustic, prodigal, exodus, irreverent, tenuous, retribution, taciturn, raconteur. Usually talkative, Leah has not spoken since her dog died over the weekend. From this sentence, we can infer that losing her pet has made Leah _____.

Solve the given differential equation by using an appropriate substitution. $y d x+\left(1+y e^{x}\right) d y=0$

The table shows the temperatures for five towns.

$$\begin{matrix} \text{Town} & \text{Z} & \text{Y} & \text{X} & \text{W} & \text{V}\\ \ {Temperature (^{\circ} C)} & \text{-1.9} & \text{7.4} & \text{-12.2} & \text{6} & \text{-5.7}\\ \end{matrix}$$

What is the correct order from wannest to coldest? A. X, V, Z, W, Y. B. Z, V, X, W, Y. C. X, Y, W, V, Z. D. Y, W, Z, V, X. Reyhan chose C as the correct answer- How did she get that answer?

Completa las oraciones y confirma de quién son las cosas. -¿Ésta es tu computadora portátil? -No, no es BLANK.

Find the number of real solutions of the equation.

$$9 x^{2}+6 x+1=0$$

Use matrices A, B, C, and D. Find each scalar product, sum, or difference, if possible. If an operation is not defined, label it undefined.

$$A=\left[\begin{array}{cccc}{6} & {1} & {0} & {8} \\ {-4} & {3} & {7} & {11}\end{array}\right] \quad B=\left[\begin{array}{rr}{1} & {3} \\ {-2} & {4}\end{array}\right] \quad C=\left[\begin{array}{rr}{-2} & {1} \\ {4} & {0} \\ {2} & {2} \\ {1} & {1}\end{array}\right] \quad D=\left[\begin{array}{rr}{5} & {-2} \\ {3} & {6}\end{array}\right]$$

3A

In the atomic domain, energy is often measured in electron-volts. Arrive at the following expression for the energy of a light-quantum in eV when the wavelength is in nanometers: $\mathscr{E}=\frac{1239.8 \mathrm{eV} \cdot \mathrm{nm}}{\lambda}$. What is the energy of a quantum of 600-nm light?

Suppose we place a chamber 10.0 cm long with flat parallel windows in one arm of a Michelson Interferometer that is being illuminated by 600-nm light. If the refractive index of air is 1.000 29 and all the air is pumped out of the cell, how many fringe-pairs will shift by in the process?

A 150-liter cylinder of carbon monoxide is stored in a $30.7-\mathrm{m}^{3}$ room. The pressure gauge on the tank reads 2500 psi when the tank is delivered. Sixty hours later the gauge reads 2245 psi. The Threshold Limit Value Ceiling (TLV-C) molar concentration of CO—that is, the concentration considered unsafe for even instantaneous human exposure—is 200 ppm ($200 \times 10^{-6} \mathrm{mol} \mathrm{CO} / \mathrm{mol}$ room air). The temperature of the room is constant at $27^{\circ} \mathrm{C}$. a) The decrease in pressure is a source of concern, but it may have resulted from a reduction in the temperature of the tank as it was transported from the loading dock to the air-conditioned laboratory. Without assuming that the gas behaves ideally, show that this is unlikely to be the case. b) Having determined that the pressure decrease must be due to a leak, estimate the average leak rate (mol CO/h), again without assuming that the gas behaves ideally. c) Calculate $t_{\min }(\mathrm{h})$, the minimum time from delivery at which the average concentration of CO in the room could have reached the TLV-C concentration. Explain why the actual time to reach this concentration would be greater. d) Why could it be disastrous to enter the room at any time without wearing proper personal protective equipment, even at a time $t<t_{\min }$? (Think of at least three possible reasons.)

3. The area of a rectangle is given by the relation $A = 16 x ^ { 2 } - 24$ a) Determine possible dimensions of this rectangle. b) Is there more than one possibility? Explain.

Complete the equations showing powers of 10 using exponents. a. $3 \times 1,000=3 \times$ ______ = ______. b. $0.07 \times 100=0.07 \times$ ______ = ______. c. $0.009 \times$ ______ = $0.009 \times 10^{2} =$ ______.

Prove that at normal incidence on the boundary between two dielectrics $\left[t_{\|}\right]_{\theta_{i}=0}=\left[t_{\perp}\right]_{\theta_{i}=0}=\frac{2 n_{i}}{n_{i}+n_{t}}$.

What was the “Double V” campaign? Which African American leader took steps to expand economic opportunities for African Americans in industry? How did President Roosevelt respond?