Remember that an exponent means repeated multiplication.
The exponent of 4 means you have four
's mutiplied together:

And then each exponent of 2 inside means you have two
's multiplied inside each set of parentheses.:

There are 8 b's there when you expand this out.
Answer: 70
jvjgvjcjcjcjcjcjcuftsydyf
.3, 3 out of 10 are covered making .3, 30%
Because if you multiply a negative by a negative, it is positive, right? So, in this instance it is cubed, which means that the number is multiplied by itself 3 times, so the positive is multiplied by the negative, which makes it negative
When mutiplying two negatives you will get a positive so answer A