The cost to rent a dump truck is $50 per day plus $26 per hour of use. What is the maximum number of hours the truck can be used each day if the rental cost should not exceed $193 per day?

Jamie is hiking up a small mountain. he climbs up at a constant rate of 300 feet/hour until he reaches the peak at 1,500 feet. after that, he hikes down at the same rate to the base of the mountain. the equation that models jamie’s elevation, e, after t hours is e = . jamie’s elevation will be 600 feet after hours and after hours.

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

What is the number 321,000,000 in scientific notation? also what is the number? ?