Suppose a heat exchanger costs $1200 and reduces the heating bill by $200 per year what is the payback time?

A/b=c for b Wht is b

A rectangle is dilated by a scale factor of 3. What will be the resulting effect on the area?

Use long division to find the quotient below. (8x3 + 2x2 - 72) (x - 2) A. 8x2 + 18x + 36 B. 8x2 - 12x + 36 C. 8x2 + 12x + 36 D. 8x2 - 18x + 36

When rolling a number cube numbered 1 to 6, how would you describe the chances of rolling a number greater than or equal to 3 versus rolling a number less than 3? A. more likely to roll a number greater than or equal to 3 B.

An exterminator charges $80 to visit a home and $35 to spray each room. If the total bill was $395, how many rooms were sprayed? Write an algebraic equation that represents this situation. Then solve it.

The manager of a sawmill wants to find out what percentage of the boards that the mill produced are defective. Which sampling methods are likely to be biased? Choose all answers that are correct. A.

A nickel pyramidal paper weight has a square base of sides 5 cm and a height of 3 cm. What is the mass of a dozen such paper if the mass of 1 cm3 of nickel is 8.9 g?'

a sample of 49 observations is taken from a normal population with a standard deviation of 10. the sample mean is 55. Determine the 99% confidence interval for the population mean.

Which of the following are properties of right triangles? 1. The square of the hypotenuse is equal to the sum of the squares of the other two sides 2.

21717 in expanded form