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Stells [14]
2 years ago
14

A person is canoeing on a river. Her overall speed is 3.4 mile(s) per hour up river and 5.6 mile(s) per hour down river. Find th

e speed of the river's current and the speed the person can paddle in still water.
Mathematics
1 answer:
PIT_PIT [208]2 years ago
5 0

Answer:

a) v_{river} = 1.1\,mph, b) v_{person} =4.5\,mph

Step-by-step explanation:

Overall speeds up river and down river are modelled by following expressions:

Up River

-3.4\,mph = v_{river} - v_{person}

Down River

5.6\,mph=v_{river} + v_{person}

After some algebraic manipulations, speeds are found:

v_{river} = 1.1\,mph

v_{person} =4.5\,mph

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mart [117]

The single apple on day 10 is an outlier because it is all by its self and the there is a cluster from 4 to 6 because there are multiple apples on days 4, 5, and 6 so your answers would be A and B :)

5 0
3 years ago
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In a certain country, the true probability of a baby being a boy is 0.519. Among the next nine randomly selected births
yawa3891 [41]

Answer:

0.9973

Step-by-step explanation:

Given :

Probability of girl, probability of success , 1 - p = 1 - 0.519 = 0.481

1 - p = 0.481

n = 9

Probability that atleast one is girl

Usingbthe binomial probability distribution :

P(x =x) = nCx * p^x * (1 - p)^(n - x)

USing the binomial probability calculator :

p(x ≥ 1) = p(x=1) + p(x=2) + p(x=3) + p(x=4) + p(x=5) + p(x=6) + p(x=7) + p(x=8) + p(x=9)

p(x ≥ 1) = 0.9973 ( from calculator).

4 0
3 years ago
Can someone plz answer my question plz!!!!! It's in the picture
djyliett [7]

-- If the spinner is honest and the sections are all the same size, then
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8 0
2 years ago
Find the area of the circle with the given radius or diameter. Use pi = 3.14. d = 10 A =
labwork [276]

The formula in computing the area of the circle is:

A = pi (r)^2

Where r = the radius of the circle

Since you are only given the diameter of the circle, you have to solve for its radius. The radius of the circle is half its diameter. Therefore, the radius of the circle is 5 (10/2).

Now, you substitute the measurements to the formula:

A = 3.14 (5)^2

A = 3.14 (25)

A = 78.5 sq. units

5 0
2 years ago
Read 2 more answers
If a=under root s(s-a)(s-b)(s-c) then the value of a, when a =3 b =4c = 5 and s =a+b+c by 2
kramer

Answer:

6

Step-by-step explanation:

Here it's given that ,

\sf\red{\longrightarrow} A=\sqrt{s(s-a)(s-b)(s-c)}

Also ,

\sf\red{\longrightarrow} s =\dfrac{a+b+c}{2}

And we need to find out the value of A , when

  • a = 3
  • b = 4
  • c = 5

So , on substituting the respective values to find s we have ,

\sf\red{\longrightarrow} s =\dfrac{3+4+5}{2}=\dfrac{12}{2}=\bf{6}

Now let's find out A as ,

\sf\red{\longrightarrow} A = \sqrt{6(6-3)(6-4)(6-5)} \\

\sf\red{\longrightarrow}A =\sqrt{6 * 3 * 2 * 1}\\

\sf\red{\longrightarrow} A = \sqrt{3^2 * 2^2 *1^2}\\

\sf\red{\longrightarrow}A = 3*2\\

\sf\red{\longrightarrow}\boxed{\qquad \blue{\bf A = 6 \qquad}}

7 0
2 years ago
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