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Ipatiy [6.2K]
2 years ago
7

A fish swins 12 miles upstream in 4 hours. The return trip only takes 3 hours. Find the rate of the current

Mathematics
1 answer:
Gre4nikov [31]2 years ago
6 0

Answer:

1/2 mph

Step-by-step explanation:

Given :

Distance traveled, D = 12 miles

Upstream Swim time = 4 hours

Return swim time = 3 hours

Upstream rate = 12/4 = 3 mph

Return rate = 12/3 = 4 mph

Let

swim rate = s

Current rate = c

s - c = upstream rate

s + c = return rate

s - c = 3 - - - (1)

s + c = 4 - - -(2)

From (1)

s = 3 + c

Put into (2)

3 + c + c = 4

3 + 2c = 4

2c = 4 - 3

2c = 1

c = 1/2 mph

Hence, rate of current = 0.5mph

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3 years ago
Use DeMoivre's Theorem to find (3cis*pi/6)^3
Sonbull [250]

The correct value of (3cis(pi/6))³ is 27i.

<h3>What is Complex Number?</h3>

Complex numbers are numbers that consist of two parts — a real number and an imaginary number. Complex numbers are the building blocks of more intricate math, such as algebra.

Given the complex number in polar coordinate expressed as

z = r(cos∅+isin∅)

zⁿ =  {r(cos∅+isin∅)}ⁿ

According to DeMoivre’s Theorem;

zⁿ =  rⁿ(cosn∅+isinn∅)

Given the complex number;

(3cis(pi/6))³

= {3(cosπ/6 + isinπ/6)}³

Using  DeMoivre’s Theorem;

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= 27i

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brainly.com/question/10251853

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7 0
2 years ago
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As a general rule, the rotation of a right triangle around its axis would form a cone.

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JulsSmile [24]

Answer:

x=4

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x=4√2cos(45°)

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For the second diagram

tan(38°)=14/x

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Which is the equation of the line with slope 0 passing through the point (-3,6)?
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