HELP Find the circumference of the circle if the diameter is 27 cm. Round to the hundredths place.

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

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.

I'm marking the brainliest and it's 15 points