77 days turned into weeks means that you have to divide by seven.
77/7 = 11.
It took eleven weeks to plan (Answer choice D)
Ok so the answer is
so we multiply numbers that have the same variable
multiply 2 x 2
then multiply the exponents
multipling like this will look like addition.
so in other words you could do it like this too
now add the exponent with 4
now for the last part
because -3 and 3 added together make 0
I hope this help(it looks complicated but it's very easy and I hope I helped you out)