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hammer [34]
2 years ago
8

A family has four daughters, Molly, Daisy, Rosie and Tilly.

Mathematics
2 answers:
Maslowich2 years ago
3 0

Answer:

Read Below

Step-by-step explanation:

Rosie 17

Daisy 14

Tilly 12

Molly 8

Leya [2.2K]2 years ago
3 0

Answer:

these questions are in maths???

oh my gwad....

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Jenna has bought a new hybrid car. Each week for a period of seven weeks, she has noted the fuel efficiency (in miles per gallon
Leviafan [203]

Answer: 0.82 miles per gallon

Step-by-step explanation:

Given : Jenna has bought a new hybrid car. Each week for a period of seven weeks, she has noted the fuel efficiency (x) (in miles per gallon) of her car.

The results are :45 44 43 44 45 44 43

The formula to find the standard deviation is given by :-

\sigma=\sqrt{\dfrac{\sum_{i=1}^n(x_i-\overline{x})^2}{n-1}}

First we find mean of the given data ,

\overline{x}=\dfrac{\sum^n_{i=1}x_i}{n}\\\\=\dfrac{45+44+43+44+45+44+43}{7}=\dfrac{308}{7}=44

Now,

{\sum_{i=1}^n(x_i-\overline{x})^2=(1)^2+(0)^2+(-1)^2+(0)^2+(1)^2+(0)^2+(-1)^2

=1+1+1+1=4

Now,  standard deviation of the above results will be :-

\sigma=\sqrt{\dfrac{4}{7-1}}\\\\=\sqrt{\dfrac{4}{6}}\\\\=\dfrac{2}{\sqrt{3}}=0.816496580928\approx0.82

Hence, the standard deviation of these results = 0.82 miles per gallon

8 0
3 years ago
Is f (x)=4/x a exponential function
maks197457 [2]
No. 4/x will take the form of a hyperbola and is called an inverse function.
5 0
3 years ago
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A bowl contains
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The answer is 166

Step-by-step explanation:

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I need some help with this
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Answer:

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Step-by-step explanation:

4 0
3 years ago
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