Al-ounce letter costs $0.50 to mail through the postal service. A 3-ounce letter costs $0.92 to mail through the postal service.
The postal services calculates the weight to the whole ounce.
What functions represent the total cost f (x) to send a letter that is 2 ounces? Select all that apply.

A:f(3) = 0.21 (x - 1) + 0.50

B:f(x) = 0.50 (2 – 1) + 0.21

C: f(x) = 0.50x

D:f(3) = 0.213 +0.29

E:f(1) = 0.212

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Fast! find the length of cu. the triangles are similar. show your work.

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.