Dollar-cost averaging means that you buy equal dollar amounts of a stock every period, for example, $500 per month. The strategy is based on the idea that when the stock price is low, your fixed monthly purchase will buy more shares, and when the price is high, fewer shares. Averaging over time, you will end up buying more shares when the stock is cheaper and fewer when it is relatively expensive. Therefore, by design, you will exhibit good market timing. Evaluate this strategy.

Molecular chlorine and molecular fluorine combine to form a gaseous product. Under the same conditions of temperature and pressure it is found that that one volume of $\mathrm{Cl_2}$ reacts with three volumes of $\mathrm{F_2}$ to yield two volumes of the product. What is the formula of the product?

Would you select ethanol , water, or oil to dissolve a nonpolar molecular substance? Explain.

Use the Comparison Tests for Convergence or Divergence to determine whether each series converges or diverges. $\sum_{k=2}^{\infty} \frac{\sqrt{k}}{k-1}$: by comparing it with $\sum_{k=2}^{\infty} \frac{1}{\sqrt{k}}$

Solve using any strategy.

A rental car costs 34.95 dollars for the first 150 miles and .35 dollars for each additional mile. How much will the rental car cost for driving 275 miles?

Find the chirality center in the molecular model of thalidomide and identify its configuration as R or S.

Describe the structures of monosaccharides, disaccharides, and polysaccharides. Which has the largest molecular mass? The smallest?

Draw a structural formula for the straightchain hydrocarbon with the molecular formula $C_3H_6$. Is this an alkane, alkene, or alkyne?

What is the molecular weight of cholesterol if $0.5731 \mathrm{~mol}$ weighs $221.6 \mathrm{~g}$ ?

Write the molecular equation and the net ionic equation for the reaction of calcium carbonate with nitric acid .

Classify each element as atomic or molecular. (a) chlorine (b) argon (c) cobalt (d) hydrogen

Twelve of the $30$ students earned an $\mathrm{A}$ on the test.

(a) What fraction of the students earned an $\mathrm{A}$ ?

(b) What percent of the students earned an $\mathrm{A}$?

(c) If one of the tests is selected at random, which is more likely: that the grade on the test is an $\mathrm{A}$ or is not an $\mathrm{A}$ ? Why?

Use the Comparison Tests for Convergence or Divergence to determine whether each series converges or diverges. $\sum_{k=2}^{\infty} \frac{1}{\sqrt{k(k-1)}}$: by comparing it with $\sum_{k=2}^{\infty} \frac{1}{k}$

The payoff matrices describe mixed-strategy games. Determine the optimal strategies for each game and the resulting value of the game.

$$\left[ \begin{array} {ccc} {12} & {-4} \\ {-6} & {14} \end{array} \right ]$$