Which visual fraction model correctly shows the shaded region for the expression 1/3 divided by 4

Me find the measure to side c and the process to solve the problem you appreciate it : )

Brian has an unlimited number of cents (pennies), nickels, and dimes. in how many different ways can he pay 1414cents¢ for a chocolate mint?

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?