Answer:
1. 81
2. 4 (square root of) 25^3
3. 30 (square root of) 10
Answer hey i dunno if you still need this but if you did could you translate to english
40 ÷ 2.40= 16.66
the teacher can buy 16 cookies
By using pythagoras theorem where
(Base)^2 +(perpedicular)^2 = (hypotenuse)^2
So,
(5)^2 +(12)^2 = (hypotenuse)^2
25 + 144 = (hypotenuse)^2
169 = (hypotenuse)^2
13 = hypotenuse
So, hypotenuse = 13