Using the arrangements formula, considering the given digits, it is found that Edward writes 6 numbers.
<h3>What is the arrangements formula?</h3>
The number of possible arrangements of n elements is given by the factorial of n, that is:

In this problem, the first digit has to be 5, while the other three are arranged, hence the total number of arrangements is given by:

More can be learned about the arrangements formula at brainly.com/question/25925367
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Answer:
30.9 cm^2
Step-by-step explanation:
A=(3*2.6)/2+3*(3*6)/2=3.9+27=30.9 cm^2
For the series 3/2 + 3/4 + 3/8 + 3/16 + ...the sum will be calculated by the formula
.
<h3>What is number series?</h3>
When the numbers are arranged in a series with some logic then it is called as the number series.
here we have a series:

The sum of the series will be given as:


Hence for the series 3/2 + 3/4 + 3/8 + 3/16 + ...the sum will be calculated by the formula 
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Answer:
9,000
Step-by-step explanation: