Twenty four students in jamal's class are wearing tennis shoe's. there are thirty student's in his class. jamal says that 70% of his class is wearing tennis shoe's. is jamal correct

To see we times 30 x  .70 = 21 so this means Jamal is not correct.

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.