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3 years ago

2+4+-56×43÷20+46-53

Mathematics

2 answers:

Pavel [41]3 years ago

8 0

Answer:

-121.4.

Step-by-step explanation:

2+4+-56×43÷20+46-53 Multiply and divide are done first:

= 2+4 + -2408 / 20 + 46 - 53

= 2 + 4 - 120.4 + 46 - 53

= -114.4 - 7

= -121.4.

guapka [62]3 years ago

4 0

Answer:

875724

Step-by-step explanation:

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3 years ago

There are 10 employees in a particular division of a company. Their salaries have a mean of 570,000, a median of $55,000,and a s

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Step-by-step explanation:

We are given that there are 10 employees in a particular division of a company and their salaries have a mean of $70,000, a median of $55,000, and a standard deviation of $20,000.

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Therefore, New mean = $\frac{1600000}{10}$ = $160,000 .

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c) Original Variance = $20000^{2}$ i.e. $20000^{2}$ = $\frac{\sum x^{2} - n*xbar }{n -1}$

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New $\sum x^{2}$ = $3,600,700,000 - $100,000^{2} + 1,000,000^{2}$ = 9.936007 * $10^{11}$

New Variance = $\frac{new\sum x^{2} - n*new xbar }{n -1}$ = $\frac{9.936007 *10^{11} - 10*160000 }{10 -1}$ = 1.103999 * $10^{11}$ Therefore, standard deviation after change = $\sqrt{1.103999 * 10^{11} }$ = $332264.804 .

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4 years ago

2+4+-56×43÷20+46-53​

2+4+-56×43÷20+46-53