From Questions to Solutions

An electric heater operates at 220 V and 440 W. What is its resistance? A. 110 ohms B. 220 ohms C. 330 ohms D. 440 ohms

Two lamps, one rated at 100 watts at 220 volts and the other at 60 watts at 220 volts, are connected in parallel to an electric train supply. What current

In logistic regression, the dependent variable (DV) has to be numeric (e.g., 23.5, 4.76, 100.2, etc.). True or False? A. True B. False C. Not applicable D. None of the

The 2012 National Health and Nutrition Examination Survey reports a 95% confidence interval of 99.8 to 102.0 centimeters for the mean waist circumference of adult women in the United States.

Select the correct answer. Consider triangle XYZ. What is the approximate length of side YZ? A. 15.7 units B. 47.1 units C. 13.3 units D. 38.2 units

Calculate the molality of a solution containing 9.23 g of glycerol ([tex]C_3H_8O_3[/tex]) in 97.8 g of ethanol ([tex]C_2H_5OH[/tex]). Be sure your answer has the correct number of significant figures.

Tucker and Emily both had math tests today. Tucker got 16 out of 20 questions correct. Emily said she got the same percentage correct, but she had 25 questions on

A well is being drilled at a vertical depth of 12, 200 ft while circulating a 12-lbm/gal mud at a rate of 9 bbl/min when the well begins to flow.

Use the equation to predict the average daily temperature for a certain city, whose latitude is 39.4 degrees N. Round to one decimal place. The average daily temperature for the

How much heat transfer (in kilocalories) is required to thaw a 0.450-kg package of frozen vegetables originally at 0°C if their heat of fusion is the same as that of

Let [tex]$f(x)=7x-4$[/tex]. What is [tex]$f(6)$[/tex]?A. 48 B. 42 C. 38 D. 46

Your friend who is visiting from Canada just took her temperature. When she reads 99.8 ∘F, she becomes concerned that she is quite ill. How would you explain this temperature

Given an actual demand this period of 65, a forecast for this period of 78, and an alpha of 0.6, what would the forecast for the next period be using

The combined weight of 5 student backpacks is 36.9 pounds. What is the approximate weight of 1 backpack?

3. A saturated-liquid mixture of benzene and toluene is fed at a rate of 350 mol/h into a distillation column. The feed consists of 154 mol/h of benzene. It is