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Mandarinka [93]
3 years ago
13

I need help with this problems 7 to 14

Mathematics
2 answers:
ella [17]3 years ago
4 0
7. Irrational
8. Not a real number, but answer would be 4i
9. Undefined
10. Rational
11. Rational
12. Rational
13. Irrational
14. Rational
oee [108]3 years ago
4 0
7, 8, 0, 7, 0.35, -9, 7/9, -1.3, these are the answers in order. Just use a calculator
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Answer:

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Step-by-step explanation:

Work done is given by

work \ done=\int_a^b w(d-x) \ dx , where d = length of cable and w = weight of cable.

Here, d = 175 ft and w = 3 lb/ft

Now, work \ done=\int_0^{175} 3(175-x) \ dx

work \ done= 3\left [175x-\frac{x^2}{2}  \right ]_0^{175}

work \ done= 3\left [175^2-\frac{175^2}{2}  \right ]

work \ done= 3\cdot \frac{175^2}{2}

work \ done= 45937.5

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