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weeeeeb [17]
2 years ago
8

Lauren bought a jacket that was on sale. She paid

Mathematics
2 answers:
timama [110]2 years ago
8 0
Subtract 30-75 your answer is 45
Citrus2011 [14]2 years ago
5 0

Answer:

$45

Step-by-step explanation:

40% of 75 is= 30

subtract 30-75=

45!!!

$45 is you answer

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3a^4(2b^6c^3)^2<br> Can someone help me simplify this?
Grace [21]
First you do 3a^4(2b^6c^3)^2
=12a^4b^12c^6
7 0
3 years ago
Heights of men have a bell-shaped distribution, with a mean of 176 cm and a standard deviation of 7 cm. Using the Empirical Rule
Vaselesa [24]

Answer:

a) 68% of the men fall between 169 cm and 183 cm of height.

b) 95% of the men will fall between 162 cm and 190 cm.

c) It is unusual for a man to be more than 197 cm tall.

Step-by-step explanation:

The 68-95-99.5 empirical rule can be used to solve this problem.

This values correspond to the percentage of data that falls within in a band around the mean with two, four and six standard deviations of width.

<em>a) What is the approximate percentage of men between 169 and 183 cm? </em>

To calculate this in an empirical way, we compare the values of this interval with the mean and the standard deviation and can be seen that this interval is one-standard deviation around the mean:

\mu-\sigma=176-7=169\\\mu+\sigma=176+7=183

Empirically, for bell-shaped distributions and approximately normal, it can be said that 68% of the men fall between 169 cm and 183 cm of height.

<em>b) Between which 2 heights would 95% of men fall?</em>

This corresponds to ±2 standard deviations off the mean.

\mu-2\sigma=176-2*7=162\\\\\mu+2\sigma=176+2*7=190

95% of the men will fall between 162 cm and 190 cm.

<em>c) Is it unusual for a man to be more than 197 cm tall?</em>

The number of standard deviations of distance from the mean is

n=(197-176)/7=3

The percentage that lies outside 3 sigmas is 0.5%, so only 0.25% is expected to be 197 cm.

It can be said that is unusual for a man to be more than 197 cm tall.

3 0
3 years ago
18 2by5-4 1by10 find the difference
luda_lava [24]

Given:

The expression is:

18\dfrac{2}{5}-4\dfrac{1}{10}

To find:

The difference.

Solution:

We have,

18\dfrac{2}{5}-4\dfrac{1}{10}

It can be rewritten as:

=\dfrac{90+2}{5}-\dfrac{40+1}{10}

=\dfrac{92}{5}-\dfrac{41}{10}

Taking LCM, we get

=\dfrac{184-41}{10}

=\dfrac{143}{10}

=\dfrac{140+3}{10}

=14\dfrac{3}{10}

Therefore, the value of the difference is 14\dfrac{3}{10}.

3 0
3 years ago
A shopper pays $87.15 for an $83 ceramic vase after sales tax is added. What is the sales tax percentage?
nexus9112 [7]

Answer:

5% or $4.15

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
When using the quadratic formula to solve 7x2 – 3x + 2 = 0, which number will be squared as part of the formula?
rjkz [21]

Answer:

The value of b will be squared

Step-by-step explanation:

Recall that the quadratic formula is x=\frac{-b\pm\sqrt{b^{2}-4ac } }{2a}

You will see that the only squared coefficient is b.

6 0
2 years ago
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