For a given interest rate, simple interest varies jointly as the principal and time. If $3000 left in an account for 5 years eamed interest of $900, then how much interest would be earned in 7 years?

2/3

step-by-step explanation:

step-by-step explanation:

there's the chart

answer: it actually depends on which is the independent variable and which is the dependent variable. let us say we're looking at a linear equation. y=2x+3. we theoretically could switch the equation to be x=(y-3)/2 and it would be the same line. so either a causes b or it can be that b causes a. so technically the answer is false

step-by-step explanation:

discount price = (original price)(1 – 0.15)

is the right answer   on edge