An asteroid is heading toward Mars at the rate of 7.7 × 104 mi./hr. If the asteroid is 3.311 × 108 miles away from Mars, how many hours will it be before it hits Mars? Write the answer in scientific notation, expressed to the exact decimal place.
It will take approximately 4.29 hours for the asteroid to hit Mars.
In scientific notation, this is written as 4.29 x 10^0 hours, which simplifies to 4.29 hours.