Answer:
69 mins
Step-by-step explanation:
46/10=4.6 mins per wall
46/4=11.5 mins per wall
11.5 x 6=69
321 / 100 = 3.21 as you are dividing by 10, and then 10 again
60 because 2:4 is 1/2, and when you divide by a fraction, you multiply by the reciprocal (2/1 instead of 1/2) which would be 60 in this case.
Answer:

Step-by-step explanation:
when you raise an exponent to a power you multiply
Also since the terms inside the parenthesis are multiplied and not added, you don't have to worry about expanding it
