Using either logarithms or a graphing calculator, find the time required for the initial amount to be at least equal to the final amount. $7000, deposited at 3% compounded quarterly, to reach at least $8000
The time required is year(s).
(Type an integer or decimal rounded up to the next quarter.)

Carla is saving money for a trip this summer. she already has some money in her savings account and will add the same amount to her account each week. at the end of 2? weeks, carla has? $130. at the end of 8? weeks, she has? $280. write a linear function in the form y=mx+b to represent the amount of money m that carla has saved after w weeks.