A new machine with better technology produces 210gel pens every fifteen minutes. What is the constant of proportionality in the relationship between the number of gel pens and the number of minutes? The constant of proportionality is

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie