On Wednesday a music store sold 44 country music CDs for $13 per CD and 58 rock CDs for $16 each. The store also sold 39 jazz CDs that day. What information is NOT needed to find the total amount in sales of the country music and rock CDs? A. the price of each rock CD
B. the number of jazz CDs sold
C. the number of country music CDs sold
D. the price of each country music CD

Data for the height of a model rocket launch in the air over time are shown in the table. darryl predicted that the height of the rocket at 8 seconds would be about 93 meters. did darryl make a good prediction? yes, the data are best modeled by a quadratic function. the value of the function at 8 seconds is about 93 meters. yes, the data are best modeled by a linear function. the first differences are constant, so about 93 meters at 8 seconds is reasonable. no, the data are exponential. a better prediction is 150 meters. no, the data are best modeled by a cubic function. a better prediction is 100 meters.