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ladessa [460]
3 years ago
11

Mrs. Benton treats herself to a day at Nail Spa. The services she receives are a manicure for $25 and a pedicure for $30. She al

so asks for a special nail polish that costs $5.00 extra. She decides to leave a 30% tip. Which expression can be used to calculate the tip?
Mathematics
2 answers:
Mariulka [41]3 years ago
4 0

Answer:

guys idk

Step-by-step explanation:

sleet_krkn [62]3 years ago
3 0
(60x30) / 100 =
1800 /100 =
18
$18 for tip
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Mandarinka [93]
ANSWER: V=167.5

EXPLANATION: Input the radius and height given in the problem and plug into the cone volume formula attached below!

5 0
3 years ago
How to find what points intersect x axis on a circle?
Alchen [17]
To find points, we use the graphing technique or analytic algebra.
3 0
3 years ago
Carlos find the absolute value of -5 3/10 and then find is the opposite of his answer Jason finds the opposite of -5 3/10 and th
a_sh-v [17]

we know that

5 \frac{3}{10}= \frac{5*10+3}{10} = \frac{53}{10}

Step 1

<u>Carlos's method</u>

1) <u>Find the absolute value of -\frac{53}{10}</u>

\left|-\frac{53}{10}\right|=\frac{53}{10}

2) <u>Find the opposite</u>

opposite=-\frac{53}{10}

Step 2

<u>Jason's method</u>

1) <u>Find the opposite of  -\frac{53}{10}</u>

opposite=\frac{53}{10}

2) <u>Find the absolute value </u>

\left|\frac{53}{10}\right|=\frac{53}{10}

Step 3

<u>Compare the answers</u>

\frac{53}{10} > -\frac{53}{10}

therefore

<u>The answer is</u>

The greater value is obtained with the method of Jason

4 0
3 years ago
Here are summary statistics for randomly selected weights of newborn​ girls: nequals=174174​, x overbarxequals=30.930.9 ​hg, seq
MaRussiya [10]

Answer:

The 95% confidence interval would be given by (29.780;32.020)  

Step-by-step explanation:

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=30.9 represent the sample mean for the sample  

\mu population mean (variable of interest)

s=7.5 represent the sample standard deviation

n=174 represent the sample size  

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=174-1=173

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a tabel to find the critical value. The excel command would be: "=-T.INV(0.025,173)".And we see that t_{\alpha/2}=1.97, this value is similar to the obtained with the normal standard distribution since the sample size is large to approximate the t distribution with the normal distribution.  

Now we have everything in order to replace into formula (1):

30.9-1.97\frac{7.5}{\sqrt{174}}=29.780    

30.9+1.97\frac{7.5}{\sqrt{174}}=32.020

So on this case the 95% confidence interval would be given by (29.780;32.020)    

The value 29.6 is not contained on the interval calculated.

5 0
3 years ago
Simplify the following expression: (6.8 × 10^3) ×(4.54 × 10^6)
swat32
(6.8\cdot10^3)\cdot(4.54\cdot10^6)=(6.8\cdot4.54)\cdot(10^3\cdot10^6)=30.872\cdot10^{3+6}\\\\=30.872\cdot10^9=3.0872\cdot10^{10}

8 0
3 years ago
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