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3 years ago

What kind of number is the sum, difference, or product of two complex numbers?

Mathematics

1 answer:

vovangra [49]3 years ago

7 0

Answer:

Multiplication of two complex numbers is also a complex number

Step-by-step explanation:

You might be interested in

Estimate 58% of 112 using benchmark percents. Explain your answer.

vitfil [10]

Answer:

64.96

Step-by-step explanation:

The most common benchmark percents are $0\% , 10\% , 25\% , 50\% , 75\%$ and $100\%$

We are given $58\%$ which is closest to $50\%$ .

Now we calculate $50\% \ of \ 112$ which is equal to $56$ .

We are left with $8\%$ more to add.

We can say $1\% \ of \ 112 \ is\ 1.12$

Therefore $8\% \ of \ 112 \ would \ be \ 1.12\times8=8.96$

Now add the two.

$56+8.96= 64.96$

Thus 64.96 is the answer.

3 0

3 years ago

A randomized study compared the effectiveness of two mosquito repellents. The treatment group using Spray A reported a mean of 3

BlackZzzverrR [31]

Answer:

The difference of the means is not significant because the re-randomizations show that it is within the range of what could happen by chance.

Step-by-step explanation:

Given that:

The treatment group using Spray A reported a mean of 3.5 mosquito bites.

The treatment group using Spray B reported a mean of 5.6 mosquito bites.

After the data are re-randomized; the differences of the means are shown in the dot plot. The dot plot is attached in the file below;

The best conclusion that can be make based on the data from the dot plot is :

The difference of the means is not significant because the re-randomizations show that it is within the range of what could happen by chance.

5 0

3 years ago

It took 35 seconds for 5 songs to download to Rebecca’s computer. The next day, it took 42 seconds for 6 songs to download. Writ

sleet_krkn [62]

The equation in point-slope form to represent the time y it took to download x songs is; (y - 35) = 7(x - 5)

Since it took 35 seconds for 5 songs to download

and it took 42 seconds for 6 songs to download

In essence, we can represent the information as;

(5, 35) and (6,42)

To find the slope of the equation; we have;

Slope, m = (42-35)/(6-5)

m = 7

In essence, the equation in point-slope form to represent the time y it took to download x songs is;

(y - 35) = 7(x - 5)

brainly.com/question/6497976

3 0

2 years ago

Sarah is doing research on the average age of first-year resident physicians. She wants her estimate to be accurate to within 1

WINSTONCH [101]

Answer: The number of first-year residents she must survey to be 95% confident= 263

Step-by-step explanation:

When population standard deviation ( $\sigma$ ) is known and margin of error(E) is given, then the minimum sample size (n) is given by :-

$n=(\dfrac{z^*\sigma}{E})^2$ , z* = Two-tailed critical value for the given confidence interval.

For 95% confidence level , z* = 1.96

As, $\sigma$ = 8.265, E = 1

So, $n= (\dfrac{1.96\times8.265}{1})^2 =(16.1994)^2\\\\= 262.42056036\approx263\ \ \ [\text{Rounded to the next integer}]$

Hence, the number of first-year residents she must survey to be 95% confident= 263

7 0

3 years ago

jamal deposits 2,500 into each of two savings accounts.The first account has a 4% annual simple interest .Account two earns 5% a

nika2105 [10]

Answer:

$5,675

Step-by-step explanation:

you would just take 4% and 5% of 2500 which is 100 and 125 and multiply them both by 3 which is 300 and 375 and add them both to the 2500 which is 2800 and 2875 and since it asks for the sum you would add then to get a total of $5,675

7 0

3 years ago