The ratio of the number of boys to the number of girls in a school is 7: 9. If there are 1,248 students in the school, how many girls are there?

The answer is 63.!

Y’all got to do it all over

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.