1- a soma de dois números é 1620 e a diferença entre eles e 740.quais são esses números?

Can someone me with this? i’m not sure what to put for my equations.

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.

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25