This is part of Zalika's homework

A) Explain the mistake that Zalika made.

B) Work out the correct answer for her.

A) She did not covert them in the same unit before taking the difference

B) 72 - (180/100) = 70.2 cm²

Or,

(72×100) - 180 = 7020 mm²

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i

the answer is 8/21

hope this