Geometry math question no guessing and show work

What is the base of 1/9 to the power of 2

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.