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Gennadij [26K]
3 years ago
14

Ellen is at a hydroplane boat show starting from 1.0 miles away the boat drives toward her and then passes her the boat travels

at a constant rate of 70 miles per hour the distance of the boat from ellen is given by d=|1.0-70t| at what time is the boat 0.15 miles from ellen calculate your answers in seconds.
Answer choices:

A: 42 seconds and 61 seconds
B: 40 seconds and 50 seconds
C: 437 seconds and 591 seconds
D: 43.7 seconds and 59.1 seconds
Mathematics
1 answer:
navik [9.2K]3 years ago
8 0
The 40 seconds and 50
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Answer:

Volume of smaller cone =301.44

Step-by-step explanation:

First let angle of cone be\alpha.

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cos(\alpha ) = 4/5

Now for smaller cone radius be R

3/5 =R/Slant height

Slant height =5/3R

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Given lateral surface area =60\pi =\frac{1}{2}(\frac{5R}{3} )^{2} \beta   ...................................1

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\beta=\frac{6\pi }{5}

Put angle beta in equation 1 and find the value of R

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Step-by-step explanation:

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