If the fourth term in a geometric sequence is –1 and the common ratio is –1, find the explicit formula of the sequence.

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

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?

The longer leg of a 30-60-90 trangle is 18