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taurus [48]
3 years ago
13

A boat drops an anchor 17.5 feet to the bottom of a lake.If the anchor falls at a rate of .07 feet each second how long will it

take the anchor to reach the bottom of the lake?
Mathematics
1 answer:
Serhud [2]3 years ago
4 0

Answer:

25 Seconds.

Step-by-step explanation:

You need to know how many seconds it takes to read the bottom of the lake.

If, each second, the anchor is falling 0.7 feet, then you need to know how many times it falls 0.7 feet.

This is done by dividing 17.5 by 0.7, which is 25 seconds.

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sattari [20]
The numbers 55 and 55.
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3 years ago
Yahoo creates a test to classify emails as spam or not spam based on the contained words. This test accurately identifies spam (
Amiraneli [1.4K]

Answer and Step-by-step explanation:

The computation is shown below:

Let us assume that

Spam Email be S

And, test spam positive be T

Given that

P(S) = 0.3

P(\frac{T}{S}) = 0.95

P(\frac{T}{S^c}) = 0.05

Now based on the above information, the probabilities are as follows

i. P(Spam Email) is

= P(S)

= 0.3

P(S^c) =  1 - P(S)

= 1 - 0.3

= 0.7

ii. P(\frac{S}{T}) = \frac{P(S\cap\ T}{P(T)}

= \frac{P(\frac{T}{S}) . P(S) }{P(\frac{T}{S}) . P(S) + P(\frac{T}{S^c}) . P(S^c) }

= \frac{0.95 \times 0.3}{0.95 \times 0.3 + 0.05 \times 0.7}

= 0.8906

iii. P(\frac{S}{T^c}) = \frac{P(S\cap\ T^c}{P(T^c)}

= \frac{P(\frac{T^c}{S}) . P(S) }{P(\frac{T^c}{S}) . P(S) + P(\frac{T^c}{S^c}) . P(S^c) }

= \frac{(1 - 0.95)\times 0.3}{ (1 -0.95)0.95 \times 0.3 + (1 - 0.05) \times 0.7}

= 0.0221

We simply applied the above formulas so that the each part could come

8 0
2 years ago
Kayla drives 15 miles in 20 minutes. If she drove one hour in total at the same rate,
Rudik [331]

Answer:

45 miles

Step-by-step explanation:

first divide miles/minutes: 15 / 20 = 0.75

then multiply: 0.75 x 60 = 45

3 0
3 years ago
What's the perimeter and area?
ololo11 [35]
Area = 267
perimeter = 72

area- solve for the area of the 18 by 10 section, then the area of the 7 by 21 section. once you have those, determined the size of the shared area between those two and subtract from one of them.

perimeter- just add
6 0
3 years ago
Read 2 more answers
What is the image of the point (9,8)(9,8) after a rotation of 180 counterclockwise about the origin?
DENIUS [597]

Answer:

(-9, -8)

Step-by-step explanation:

5 0
3 years ago
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