20% of students drive a car. 9 students are randomly are selected and asked if they drive a car. What is the probability that exactly five out of the nine students drive a car?

Krypton-85 has a half life of 11 years. If a scientist has 500 grams of Krypton-85 in her lab and she decides not to use any for her experiments how much will remain after 50 years? (round to the nearest gram)

What is the sum (2/5x+5/8) + (1/5x-1/4)

The school store has 750 packs of crayons. each pack has 12 markers in it. how many markers are there in all

Kurt used the rule add 4, subtract 1 to generate a pattern. The first term in his pattern is 5. Write a number that could be in jury's pattern

A square patio has a area of 203 square feet. how long is each side of the patio to the nearest 0.05

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

Which of the following statements describes circumscribing? Choose all correct answers. A) One figure is drawn around the other. B) One figure must be a circle. C) The figure on the inside circumscribes the figure on the outside.