Emily takes a trip, driving with a constant velocity of 89m5 m/s to the north except for a 22 min rest stop. if emily's average velocity is 77.8 m/s to the north, how long does the trip take?

Emily moves with speed 89.5 m/s

let it travel for time "t" so the distance covered by it

now the average speed is given as

here total time of the journey will be given as

now we have

so it will move for t = 2.44 h

so the total time of the trip would be given by adding waiting time or time of stop

so his total time of journey is 2.8 h

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form