Coffee cafe makes 90 pounds of coffee that costs $6 per pound. the types of coffee used to make this mixture cost $7 per pound and $4 per pound. how many pounds of $7-per-pound coffee should be used in this mixture?

P= $1400,300 r = 7 1/2% t = 4 what is i ? $4.29 $429.00 $4290.00

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?