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strojnjashka [21]
2 years ago
10

You buy 6 items for $25.60. About how much did you spend? $125 $145 $75 $150

Mathematics
2 answers:
garik1379 [7]2 years ago
3 0
The answer is 150 because 6 times 25.60 equals 153.6
Bad White [126]2 years ago
3 0

<em>Answer</em><em>:</em><em> </em><em>About</em><em> </em><em>$</em><em>1</em><em>5</em><em>0</em><em>.</em>

<em>Explanation</em><em>:</em><em> </em><em>Each</em><em> </em><em>item</em><em> </em><em>cost</em><em> </em><em>$</em><em>2</em><em>5</em><em>.</em><em>6</em><em>0</em><em>,</em><em> </em><em>so</em><em> </em><em>I</em><em> </em><em>multiplied</em><em> </em><em>it</em><em> </em><em>into</em><em> </em><em>six</em><em>,</em><em> </em><em>equalling</em><em> </em><em>about</em><em> </em><em>$</em><em>150</em><em>.</em>

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ASHA 777 [7]

Answer:  The 90% confidence interval for the population mean μ is between 82.85 and 85.15,

Step-by-step explanation:

When population standard deviation is not given ,The confidence interval population proportion is given by (\mu ):-

\overline{x}\pm t^*\dfrac{s}{\sqrt{n}}

, where n= Sample size.

s= Sample standard deviation

\overline{x} = sample mean

t* = Critical t-value (Two-tailed)

As per given , we have

\overline{x}=84

n= 64

Degree of freedom : df = n-1=63  

s= 5.5

Significance level : \alpha=1-0.90=0.1

Two-tailed T-value for df = 63 and  \alpha=1-0.90=0.1 would be

t_{\alpha/2,df}=t_{0.05,63}=1.669  (By t-distribution table)

i.e. t*= 1.669

The 90% confidence interval for the population mean μ would be

84\pm (1.669)\dfrac{5.5}{\sqrt{64}}

=84\pm (1.669)\dfrac{5.5}{8}

\approx84\pm 1.15

=(84-1.15,\ 84+1.15)=(82.85,\ 85.15)

∴ The 90% confidence interval for the population mean μ is between 82.85 and 85.15,

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This isn’t possible.
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serg [7]

Since Sin is equal to opposite over hypotenuse

so that's mean Sin(60°) = \frac{x}{16}

#I just rounddown from angle 65° to 60° as the number is not that much different.

and Sin(60°) is equal to \frac{\sqrt{3} }{2}

so we got Sin(60°) = \frac{\sqrt{3} }{2} = \frac{x}{16}

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Step-by-step explanation:

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