When you are multiplying an exponent directly into a number/variable with an exponent, you multiply the exponents together.
For example:


When you are multiplying a variable with an exponent by another variable with an exponent, you add the exponents together.
For example:



You multiply 3 into each exponent in the numerator and the denominator

When you have a negative exponent, you move it to the other side of the fraction to make the exponent positive.

When you have something like this:

You subtract the exponents together, so:

Your answer is the second option
You just have to divide the 1/2 a pound by 8, or equivalently multiply by (1/8):
(1/2)*(1/8) = 1/16 of a pound
We want 4/5 of a number to be 144. This means that

Multiplying both sides by 5/4, we have

Answer:
the answer is 4/10
Step-by-step explanation:
The area of a circle is π (Pi) times the Radius<span> squared: A = π × r</span>2. Or, when you know the Diameter: A = (π/4) × D2<span>.</span>