Find the amount of 3 naira 5 and half years at 7%

Find the greatest common factor of 28 and 35

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.

I’m still confused on how to work the percentages