2 years ago

The cost of the computer is $115.00 and the tax charged is $8.05. what is the tax rate

Mathematics

2 answers:

inysia [295]2 years ago

5 0

Answer:

5% i think

Step-by-step explanation:

Leona [35]2 years ago

4 0

Answer:4%?

Step-by-step explanation:

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Determine if the set is the empty set. X | x > 7 and x < 10

sveticcg [70]

x > 7 x < 10

7 o---------------------o 10

This is not an empty set. x contains all of the values between 7 and 10.

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3 years ago

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In a random sample of 30 people who rode a roller coaster one day, the mean wait time is 46.7 minutes with a standard deviation

Rainbow [258]

Answer: C. $(29,\ 37.8)$

Step-by-step explanation:

The confidence interval for difference of two population mean is given by :-

$\overline{x}_1-\overline{x}_2\pm z_{\alpha/2}\sqrt{\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2}}$

Given : Level of significance : $1-\alpha:0.99$

Then , significance level : $\alpha: 1-0.99=0.01$

Critical value : $z_{\alpha/2}=z_{0.005}=2.576$

$n_1=30\ ;\ n_2=50\\\\\overline{x}_1=46.7\ ;\ \overline{x}_2=13.3\\\\s_1=9.2\ ;\ s_2=1.9$

$46.7-13.3\pm(2.576)\sqrt{\dfrac{9.2^2}{30}+\dfrac{1.9^2}{50}}\approx33.4\pm4.38=(29.02\ ,37.78)\approx(29,\ 37.8)$

Hence, a 99% confidence interval for the difference between the mean wait times of everyone who rode both rides $(29,\ 37.8)$

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3 years ago

If there are 7 blue chips and 5 red chips in a bag, what is the probability of drawing a blue chip?

Kazeer [188]

Answer:

7/12

Step-by-step explanation:

7+5=12

12-5=7

7/12

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3 years ago

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Determine whether 5n2 or 3n will have the greater value when:<br><br><br><br> a. n = 1

densk [106]

Answer:

5n2 will have a greater value

Step-by-step explanation:

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3 years ago

Can anyone give me notes on double bar graph.

kogti [31]

Answer:

have one bar be red and the other be blue

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