Need help with clear explanations please.

\fA cube has an edge of 4 feet. The edge is increasing at the rate of 3 feet per minute. Express the volume of the cube as a function of m, the number of minutes elapsed. Hint: Remember that the volume of a cube is the cube (third power) of the length of a side. 6 h sin (a) V (m) = feet3Use a system of linear equations with two variables and two equations to solve. 195 students enrolled in a freshman-level chemistry class. By the end of the semester, 4 times the number of students passed as failed. Find the number of students who passed, and the number of students who failed. Passing Students: Number Failing Students: Number