You want to estimate the mean number of songs college students store on their portable devices with a margin of error of no more than 20 songs. If the population standard deviation is 68, then how many students should you sample for a 90% confidence interval?

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Which is the best estimate of the product of 0.9 x 0.88? 0 0.25 0.5 1

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?