Question

Evaluate the expression rn, where r = 25 and n is 1/2.
A. 4
B. 5
C. 9
D. 25

Answer 1

r^n

Answer 2

B

Answer 3

rn or r^n ?

Answer 4

r^n

Answer 5

Taking something to the 1/2 power is the same as taking its square root. Likewise, taking something to the 1/3 power is the same as taking its cube root, and so on and so forth. I can't really explain the "why" very well, myself, but this site has a pretty good explanation: http://mathforum.org/library/drmath/view... if you're interested.

Answer 6

so B

Answer 7

thanks guys

Answer 8

Yw

Answer 9

no problem!