19. Mr Ong bought a total of 156 pens and pencils. The ratio of the number of pens to the number of pencils he bought was 4:9. Each pen cost $2. How
much did Mr Ong pay for the pens?​

What is 32+4 x (16 x 1/2) -2 show your work}

A(t)=728(1+0.04)^t how much money did aditya originally invest

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)