Pls hurry for Brainlist =Accurate Answer Which of the following systems of equations has infinitely many solutions?

Acone with volume 1350 m³ is dilated by a scale factor of 1/3. what is the volume of the resulting cone? enter your answer in the box. m³

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?