She is wrong because she did the square root of 25 multiplied by 2, she should have just done the square root of 50.
For the second part the square root of 50 is 7.07 which rounding would equal 7.1.
Hope this helps.(ﾉ◕ヮ◕)ﾉ*:･ﾟ✧
Commutative property of multiplication is two numbers being multiplied either way,example 1x2 = 2x1.
Unit price is the price for 1.
9.20/8 = 1.15
Unit price = $1.15
