A company makes muesli which contains nuts and sultanas. They counted the number of nuts in 50 individual serving packets.

They drew this table

Number of nuts what is the answer

The density of the cube is 40

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.