Multiply using mental math 20*72*5

A hospital employs a total of 77 nurses and doctors. The ratio of doctors to nurses is 9:2. How many nurses are employed at the hospital? How many doctors are employed at the hospital?

Mr. Hamm's salary has increased by 250% over the past 10 years. If his original salary was $28,000 per year, what is his current salary?

A tractor costs $15,450 and depreciates in value by 14% per year how much will the tractor be worth after 3 years

Write each ratio or rate as a fraction in simplest form. 9 inches of rain in 30 days

If d is the standard deviation of x, y, z, what is the standard deviation for x+5, y+5, z+5.1. d2. 3d3. 15d4. d+55. d+15

What is the ratio of the change in y-values to the change in x-values?

Explain the error below The expression x2 - 6x + 8 is a trinomial where a = 1, so it can be factored as x2 - 6x + 8 = (x + 4) (x + 2).?

At a local restaurant, the amount of time that customers have to wait for their food is normally distributed with a mean of 22 minutes and a standard deviation of 4 minutes.

If 3/8 of figure is shaded, what is 23 of 38?

Woody's Cafe Real Estate tax of $1,110.85 was due on November 1, 2010. Due to financial problems, Woody was unable to pay his cafe real estate tax bill until January 15, 2011. The penalty for late payment is 8.25% ordinary interest.