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Marta_Voda [28]
3 years ago
15

Tom weekly salary increased from $240 to $288 what was the percent of change

Mathematics
1 answer:
Greeley [361]3 years ago
7 0
288 - 240 = 48

48/240 *100 = 20%

answer: i<span>ncreased 20%</span>
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What is the absolute value of the complex number -4-√2
Zepler [3.9K]
|a+bi| = √(a² + b²)

-4-√2 i -> take a = -4 and b = -√2

|-4-√2 i| = √[ (-4)² + (<span>-√2)² ]
               = </span><span>√[ 16 + 2<span> ]
               </span></span><span>= √[ 18 ]</span> = <span>√[ 9 * 2 ]
               = 3√2
the absolute value is 3√2</span>

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3 years ago
1. Determine the size of each insect after a dilation with the scalefactor k.
aleksandrvk [35]
I don’t understand what u are asking
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How would I solve this?
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6-2x=6x-10x+20  solve for x

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6-2x+10x-6x=20
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6 0
3 years ago
Electricity usage data consists of 45 months has a mean number of units consumed is 390.47 per month with a standard deviation o
neonofarm [45]

Answer:

The 95% confidence interval for the average monthly electricity consumed units is between 47.07 and 733.87

Step-by-step explanation:

We have the standard deviation for the sample. So we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 45 - 1 = 44

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 44 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.0141

The margin of error is:

M = T*s = 2.0141*170.5 = 343.4

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 390.47 - 343.40 = 47.07 units per month

The upper end of the interval is the sample mean added to M. So it is 390.47 + 343.40 = 733.87 units per month

The 95% confidence interval for the average monthly electricity consumed units is between 47.07 and 733.87

6 0
3 years ago
Five times the sum of 173 and 32
Sladkaya [172]
173+32=205 , so 205 times 5 would equal 1,025 . so the answer would be 1,025 .
4 0
3 years ago
Read 2 more answers
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