Suppose the pool is 30 feet long and 20 feet wide. how many square tiles does the tiler need for the border

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4

Julie was able to walk 16 km through the zoo in 6 hours. how long will it take her to walk 24 km through the zoo?