Find the circumference of a circle inscribed in an equilateral triangle with a side of 9 inches.
you can find my interpretation of the problem attached. there was no picture with the problem. the number shown as the side length is '9'.

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

Me. i can't figure out this question. give an explanation too. .

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b