Gianina wanted to buy new bike. She saw that it was regularly priced at $400 but it was on clearance for $300. What is the percent of decrease? a. 100%

b. 25%

c. 30%

d. 50%

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.