Answer:

Step-by-step explanation:
-For a known standard deviation, the sample size for a desired margin of error is calculated using the formula:

Where:
is the standard deviation
is the desired margin of error.
We substitute our given values to calculate the sample size:

Hence, the smallest desired sample size is 23
You need to multiply the length and the width of the shape.
Answer:

Step-by-step explanation:
Given in the question an expression,

Step 1
Apply exponential "product rule"





Step 2
Apply exponential " divide rule"



