Please help me on numbers 1-3 :)

Point r divides in the ratio 1 : 3. if the x-coordinate of r is -1 and the x-coordinate of p is -3, what is the x-coordinate of q? a. b. 3 c. 5 d. 6 e. -9

What is the surface area of a cube with the volume of 729 ft?

Use the second shift theorem to find the inverse laplace transform of (e^−3s) / (s^2 + 2s − 3)