Aracecar was attempting to set a record. The racecar went 1000 feet 4.5 seconds. To the nearest tenth, what is the average speed of the racecar? a
222.0 ft/sec
b
222.2 ft/sec
c
222.3 ft/sec
d
222.22 ft/sec

in the middle of test

Standard deviation of 19,29,21,22,23

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0

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.