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WARRIOR [948]
3 years ago
14

The memory card on melcher did it's camera can hold about 430 pictures. Melcher used 18% of the memory card while taking picture

s at s family reunion about how many pictures did melcher take at the family reunion
Mathematics
2 answers:
NeX [460]3 years ago
8 0
The answer I got was about 77 photos but then if u have to estimate the it could be 80
Korolek [52]3 years ago
7 0
Just cross multiply to find 18% of 430
18/100 = x/430
430 X 18 = 7740
7740 = 100x
7740/100 = 77.4
so Melcher took about 77 photos.
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sergij07 [2.7K]

Answer:

a) sample size is 40

Step-by-step explanation:

(a)

\sigma=4 minutes

Margin of error, E is 75 seconds E=75/60= 1.25 minutes.

The level of significance \alpha= 0.05 for 95% level of significance

For 95% confidence interval z_{\frac{\alpha}{2}}=1.96 from standard deviation table

Sample size required, n

n=\left (\frac{z_{\frac{\alpha}{2}}\cdot \sigma}{E} \right )^{2}=\left (\frac{1.96\cdot4}{75/60} \right )^{2}=39.337984

Rounding off, n=40

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95% confidence, sample size, Wall Street Journal

3 0
3 years ago
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3 years ago
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geniusboy [140]
X + y = 90

Let's make 'x' the bigger angle and 'y' the smaller.
X is 24 more than twice y.
x = 24 + 2y

Now plug that into the x of the first equation.
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Combine like terms.
24 + 3y = 90

Subtract 24 from both sides.
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Answer:

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Step-by-step explanation:

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x = 51

4 0
3 years ago
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