The height, in meters, of a machine piston can be modeled by the regression equation y = 4.4sin(0.4x - 1.7) + 2.3, where x represents time, in seconds.
To the nearest tenth of a meter, what is the height of the piston after 10 seconds?

Determine the relationship of ab and cd given the following points

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.