I think the answer is $1.56
i hope this helps
a) (2a - b)² = (4a² - 4ab + b²)
b) (10m - n²)² = (100m² - 20mn² + n⁴)
c) (4x - 4²) = (16x² - 8x + 4⁴)
d)
e)

f)

20 because 12 divided by 3 is 4. then you multiply 5 by 4. and you get 20.
The answer will depend how many buttons does the baby have. You just have to add all the buttons together, and that will be your answer.
So 4+3+green buttons =the answer
6:10 is 47 mins before 6:57!!