please help me to answer this , in this question number 10 is already answered so this all I skip thanks

11. In item number 10, how many years will it take to reach a population of 19, 231? CO b. 11 C. 13 d. 15 12. The length of a rectangle is 8 more than thrice its width. If its width is w meter, how would you represent the area A? a. A(W) = w(3w +8) C. A(W) = 2TT(3w - 8) b. A(W) = W(3w - 8) d. A(W) = w(8w + 3) 13. If the width of the rectangle in number 12 is 4 meter, what is its area? a. 50 m2 b. 60 m2 c. 70 m d. 80 m2 14. A storage box has a length of (3x + 4) inches, a width of (x - 1) inches and a height of x inches. Write the polynomial function that will represent the volume of the box. a. (3x + 4) + (x - 1) (x) C. (3x + 4)(x - 1)(x) b. (3 x + 4 ) - (x - 1) ( x ) d. (3x + 4) + (x -1) -x 15. In item number 14, what is the volume of the box if its height is 4 inches? a. 67 ft3 b. 70 ft3 C. 73 ft 3 d. 76 ft3