Zara went to the book fair and bought 3 comic books for $5 each, 2 chapter books for $9 each, 4 posters for $2 each, and 1 picture book for $7. Write an equation that can be used to find how much Zara spent at the book fair.

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.

1/125 probability for each student so, a 0.8 percent probably of winning per student.