Arectangular pool is 30 1/3 feet long and 12 1/2 feet wide. what is the area of the pool?

What is the number 321,000,000 in scientific notation? also what is the number? ?

The anwser cause i do not understand just plez

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.