How many places do you need to move the decimal to the right to write 0.00000021 in scientific notation?

Factor x2 – 8x + 15. which pair of numbers has a product of ac and a sum of what is the factored form of the

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

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.