I need help ASAP WITH 10-11

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?