grocery wants to make two kinds of coffee one sells for $1.45 per pound and the other cells for 2.20 per pound. he wants to makes a total of 21 pounds and sell it for $1.70 per pound. How many pounds of each kind should he use in the new mix?

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.