an ice cream truck operator tracks total daily sales rounded to nearest dollar for 14 days as shown in the following 1: 201 2:249 3: 285 4:297 5:288 6:262 7:256 8:240 9:210 10:199 11:192 12:215 13:237 14:290 based on a cubic model of the data what is the predicted number of sales on the 15th day