Aperson takes a trip, driving with a constant speed of 89.5km/h, except for a 22.0−min rest stop. if the person's average speed is 77.8km/h
, how much time is spent on the trip and how far does the person travel?
average speed:

let a body covered d1,d2,d3
distances in respective time intervals t1,t2 and t3.

.

then the average speed of the body is given by

average speed=total distancetotal time=d1+d2+d3t1+t2+t3.

Will pushing on a car always change the cars mechanical energy? what must happen for the cars kinetic energy to increases?

Atank holds 1000 gallons of water, which drains from the bottom of the tank in half an hour. the values in the table show the volume v of water remaining in the tank (in gallons) after t minutes.t(min) 5 10 15 20 25 30v(gal) 694 444 250 111 28 0(a) if p is the point (15, 250) on the graph of v, find the slopes of the secant lines pq when q is the point on the graph with t = 5, 10, 20, 25, and 30.(b) estimate the slope of the tangent line at p by averaging the slopes of two secant lines.(c) use a graph of the function to estimate the slope of the tangent line at p. (this slope represents the rate at which the water is flowing from the tank after 15 minutes.)show all steps.

There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. what is the maximum road grade that your fully loaded ecv can climb?