It's urgent!

which is equivalent to rootindex 3 startroot 8 endroot superscript one-fourth x?

8 superscript three-fourths x
rootindex 7 startroot 8 endroot superscript x
rootindex 12 startroot 8 endroot superscript x
8 superscript startfraction 3 over 4 x endfraction

(the answer choices in number form are attached.) also, i know for sure it isn't d.

What aspects of lines have to be diffrent

Asap 25 pts + brainlest to right/best answer

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.