125 centimeters to 87.5 centimeters ? what is the percent of change

The circumference of a circle is 5 pi cm. what is the area of the circle?

Sunday: 1 1 2 monday: 1 tuesday: 2 1 2 wednesday: 1 3 4 thursday: 2 friday: 1 1 2 saturday: 2 jenna is a swimmer and trains every day. the schedule shown outlines the number of hours she trains each day. what is the total number of hours that jenna trains during the week?

Ihave trouble finding the nth term of a linear sequence