Question

i need you guys to check these 5 answers and tell me which are wrong ? I THINK ITS A
What is the value of expression?

5^−8 • 5^−4

A.
5^32

B.
5^4

C.
5^−4

D.
5^−12

Answer 1

\[5^{−8} • 5^{−4} = 5^{(-8)+(-4)}=5^{-12}\]

Answer 2

\[A^n * A^m = A^{n+m}\]
exponent rules

Answer 3

c?

Answer 4

Here is an example to give you an idea of this exponent rule

\[3^3\] means 3 is multiplying itself 3 times
3*3*3

\[3^3 * 3^2\]
means 3 is multiplying itself 3 times and another 3 is multiplying itself 2 times
\[(3*3*3) (3*3)\]
but this is the same as
\[3*3*3*3*3\]
so its just 5 3s, in the end its the addition of the exponents
\[3^5\]

Answer 5

ik that

Answer 6

its D

Answer 7

@dan815

Answer 8

https://mathway.com/ You This To Help You

Answer 9

\[(A^n)^m=A^{nm}\\
A^n *A^m=A^{n+m}\\
\frac{A^n}{A^m}=A^{n-m}\\
A^{-n}=\frac{1}{A^n}\\
\large {A^\frac {n}{m}= ~~~^m\sqrt{A^n}}~~~~m^{th} ~~square-root~~~and~~n^{th}~~power\]

Answer 10

use these rules to start simplifying the expression, what do you get?