The 1st row has 15 chairs.
The 2nd row has 15 + 3 = 18 chairs.
The 3rd row has 18 + 3 = 15 + 2•3 = 21 chairs.
The 4th row has 21 + 3 = 15 + 3•3 = 24 chairs.
The pattern continues, so that the n-th row has 15 + (n - 1)•3 = 3n + 12 chairs.
If there are 15 rows, then the total number of chairs is
where we use the formulas
157= (55^2) x 3.14 x h
3025 x 3.14 x h = 157
9498.5 x h = 157
h = .02
Tell me if this helps!!
The breaking strengths of cables produced by a certain manufacturer have a standard deviation of pounds. a random sample of newly manufactured cables has a mean breaking strength of pounds are 1821.9.
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What are the cables?</h3>
The cables are the wires that provide the connection.
- Round your solutions to 1 decimal place pattern imply = 1800 fashionable error = zs = 2.576[85/sqrt(100)] = 0.2576*eighty five = 21.896
- 99% CI: 1800-21.896 < u < 1821.896
- 99% CI: 1778.1 < u < 1821.9.
Read more about the cables :
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Answer:
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Explanation:
https://www.khanacademy.org/math/algebra2/x2ec2f6f830c9fb89:eq/x2ec2f6f830c9fb89:extraneous-sol/v/finding-radical-equation-with-given-extraneous-solution