Blog

A radio transmission tower is 250 feet tall. How long should a guy wire be if it is to be attached 11 feet from the top and is to make an angle of 35° with the ground? Give your answer to the nearest tenth of a foot.

A point on the terminal side of angle θ is (9, 12). Find the exact value of cos θ.

Two sides of a right triangle ABC (C is the right angle) are given. Find the indicated trigonometric function of the given angle. Give exact answers with rational denominators.Find sec B when a = 8 and b = 5.

If s denotes the length of the arc of a circle of radius r subtended by a central angle θ, find the missing quantity.r = 12.4 inches, θ = 30°, s = ?

Professional Ethics – Learning to use polite use of coercion (force) is the key to becoming an ethical professional because people with whom you deal won’t know they are being exploited. In other words, it’s okay to exploit people if you are nice to them.

In the two graphs below (left and right), blue lines are sales and red lines are forecast. Which forecast has a relatively smaller smoothing constant α?

Forecast bias can be potentially addressed by _______.

In Joe Henwood’s presentation, many features (weather, store locations, etc.) were incorporated into the forecasting model. Including as many features as possible in a forecasting model always leads to better predictions. The statement is

For simple exponential smoothing with small smoothing constant α, which of the following statements are correct?

The following table shows actual sales and two forecasts for the past two periods. Compare the forecast errors between Forecast 1 and Forecast 2, which forecast has a larger bias?