It's raining outside and after 1 hour of rain the water level injake's pond is 2 meters after 3 hours the water level is 2.8 meters find the rate of change?

Jackson earns $25 per hour as a tutor at the college library. he set a weekly spending budget of $130 each week and puts the remaining money in his savings account. how many hours must he work this week to have at least an extra $50 to put in his savings account