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goldfiish [28.3K]
3 years ago
10

Please please help

Mathematics
2 answers:
Butoxors [25]3 years ago
8 0

Answer:

i dont know but i need points lol

Step-by-step explanation:

Alex_Xolod [135]3 years ago
7 0

1. Diameter= 14-2-2 = 10 feet

2. 11x 14 = 154

1/2 x 3.14 x 5^2 = 39.25

Area = 154-39.25 = 114.75 square feet

3. 114.75 x 1.50 = $172.13

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Harmonic mean if a number h such that (h-a)/(b-h)=a/b Prove h is H(a,b) iff satisfies either relation a. (1/a)-(1/h) = (1/h) - (
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A.

\displaystyle\frac1a-\frac1h=\frac1h-\frac1b
\implies\displaystyle\frac{h-a}{ah}=\frac{b-h}{bh}
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\implies\displaystyle\frac{h-a}{b-h}=\frac ab

b.

\displaystyle h=\frac{2ab}{a+b}
\displaystyle\implies\frac{h-a}{b-h}=\frac{\frac{2ab}{a+b}-a}{b-\frac{2ab}{a+b}}
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