Can someone help me out with number 3

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?

Rewrite the expression in z to the n power. the expression i was given is: 1 over z to the negative 1 half power.

Acute identify < 1 and < 2 select all that apply of the following acute, right,obtuse, adjacent,vertical,complementary, supplementary