A skateboarder is moving with a position function r(t)=5t+2, with position in meters and time in seconds. Find the displacement from t=3 seconds to t=8seconds.

B) 20 m

A) 25 m

Using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?

Afixed electric space heater wired by a cable with an ampacity of 30 a should draw a maximum current of a. 30 a. b. 24 a. c. 15 a. d. 27 a.

Suppose that a comet that was seen in 563 a. d. by chinese astronomers was spotted again in year 1951. assume the time between observations is the period of the comet and take its eccentricity as 0.986. what are (a) the semimajor axis of the comet's orbit and (b) its greatest distance from the sun?