On average, seawater in the world oceans has a salinity of about 3.5%. how much seawater need to have evaporated to leave 100g salt?

part a- option 1 is exponential and increases 130% per year. option 2 increases $300 per year and it's linear.

part b- f(n)=1000+300n option 2

f(n)=1000(1.30)^n option 1

part c- f(20)=1000+300(20)

f(20)=1000+6000

f(20)=7,000 after 20 years for option 1

f(20)=1000(1.30)^20

f(20)=1000(190.04)

f(20)=190,040 after 20 years for option 2

we can see that there would be a significant difference in belinda's investment if she uses option 2 over option 1. there is a huge difference of 190,040 - 7,000 = 183,040 dollars.