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Ne4ueva [31]
3 years ago
5

A number written in the form a + biis called a

Mathematics
1 answer:
ryzh [129]3 years ago
6 0

Answer:

C

Step-by-step explanation:

A number in the form a + bi , where a and b are real is a complex number

a represents the real part and bi the imaginary part

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If you invest $250.00 in an account that pays a simple interest rate of 4%, how long will you need to leave the money in the acc
labwork [276]

Answer:

Step-by-step explanation:

1. A = P(1 + rt) is the formula for simple interest where A is the final amount, P is the principal amount, r is the interest rate (annual), and t is the number of time periods, or time in years (most often)

2. $25 of interest means your total amount will be $275, so A = $275. P = $250. r = .04. We are trying to find t.

3. $275 = $250(1+.04t)

4. (275/250)(1.04) = t t = 1.05

5. This means you will need to wait 2 years to earn $25 in interest  

8 0
3 years ago
Legalization of marijuana, Part I. The 2010 General Social Survey asked 1,578 US res- idents: \Do you think the use of marijuana
mixer [17]

Answer:

Step-by-step explanation:

a) Sample statistics are used to estimate population value. Since 48% is a sample proportion, therefore, it is a sample statistic.

b) For 95% confidence level, z* = 1.96.

\hat{p}\pm z^* \sqrt{\frac{\hat{p}(1-\hat{p})}{n}}= 0.61\pm 0.61\sqrt{\frac{0.61(1-0.61)}{1578}}=0.61\pm 0.024 \ or (0.586, 0.634).

We are 95% confident that the true proportion of US residents who think marijuana should be made legal lies between 58.6% and 63.4%.

c)

\\np=1578(0.61)=962.58

\\n(1-p)=1578(1-0.61)=615.42

Since both np and n(1-p), are at least 10, the normal model is a good approximation for these data.

d) As the lower limit of confidence interval is less than 0.5, less than 50% population is also a plausible value of true proportion. This means the statement "Majority of Americans think marijuana should be legalized" is not justified.

4 0
4 years ago
I need help on this
nasty-shy [4]

Answer:

the answer would be -3/4

Step-by-step explanation:

(-4,3)(0,0)

y2-y1/x2-x1

0-3/0+4

-3/4


8 0
3 years ago
A regular 18-sided polygon is rotated with the center of rotation at its center.
kvv77 [185]

360 degrees / 18 sides = 20 degrees

 the answer is 20 degrees

4 0
3 years ago
What is the circumference of a circle with a diameter of 14 feet?
mr Goodwill [35]
Solution-
Circumference of circle: 14 pi feet or 43.98.
But here answer is option A.
Answer:A
8 0
3 years ago
Read 2 more answers
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