If w is 25% of z, then z: w is 75: 25.
is it true or false? ?

That is false because is percentage is basically x/100, so W:Z is 25/100. Thus, Z:W is 100:25

It would be false for sure because 25% or .25 will be considered with 100 100/.25 and so not forget to put in simplest form so it will be 4 / .1 and that does not equal to 75/25 Hoped that helped

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.