A rocket travels at a constant speed of 4000 m/s. How long would it have to travel from the surface of the Earth to reduce its weight on Earth by 80%

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

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr