First right answer for all/both gets brian

If g^-1(x) is the inverse of g (x) which statement must be true

Maria found the least common multiple of 6 and 15. her work is shown below. multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, . . multiples of 15: 15, 30, 45, 60, . . the least common multiple is 60. what is maria's error?

What’s the volume of the triangular prism?