Mrs. wilson has 64 brownies on a plate. 1/2 ate one brownie. 1/4 keep one brownie for snack. 1/8 keep one for lunch. 8 students keep one brownie to take home. are there any brownies left on mrs. wilson plate?

No, 32 ate one, 16 keep one fore snack, 8 keep one for lunch and 8 keep one to take home so 32+16+8+8=64 and since Mrs,wilson had 64-64=0 

64 x 1/2 = 32
64 - 32 = 32
64 x 1/4 =16
32 - 16 = 16
64 x 1/8 = 8
16 - 8 = 8
8 - 8 = 0
No brownies left. :)

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.