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exis [7]
3 years ago
11

Please help ASAP ASAP asap

Mathematics
1 answer:
RoseWind [281]3 years ago
4 0
The answer is 7 R 4! hoped this helps!
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Monitors manufactured by TSI Electronics have life spans that have a normal distribution with a variance of 2,250,000 and a mean
Svet_ta [14]

Answer: 0.1357

Step-by-step explanation:

Given : Monitors manufactured by TSI Electronics have life spans that have a normal distribution with a variance of \sigma^2=2,250,000 and a mean life span of \mu=13,000 hours.

Here , \sigma=\sqrt{2250000}=1500

Let x represents  the life span of a monitor.

Then , the probability that the life span of the monitor will be more than 14,650 hours will be :-

P(x>14650)=P(\dfrac{x-\mu}{\sigma}>\dfrac{14650-13000}{1500})\\\\=P(z>1.1)=1-P(z\leq1.1)\ \ [\because\ P(Z>z)=1-P(Z\leq z)]\\\\=1-0.8643339=0.1356661\approx0.1357

Hence, the probability that the life span of the monitor will be more than 14,650 hours = 0.1357

6 0
3 years ago
Calculate the compound amount on rs 2000 for 3 years at the rate of 13% p.a
IrinaVladis [17]
A=P(1+r%)ⁿ , where P is the initial capital, r, the interest rate and n, the # years

A = 2000(1+0.13)³
A = 2000(1.13)³
A = 2,885.79
6 0
3 years ago
A SCHOOL HAS 320 GIRLS AND 250 BOYS
tigry1 [53]

Answer:

89

Step-by-step explanation:

I just multiplied 320 by 0.2 and then 250 by 0.1 and then added them  together. I hope it helps and I'm not sure what method you would use for this but that's mine.

8 0
3 years ago
Suppose you earn $5.50 an hour working at the plant nursery on weekends. Given your table of values in part a, write an equation
Zigmanuir [339]

Answer:

The total for the first year is $266 and you make 5.50 an hour so the equation is 5.50x=266

Step-by-step explanation:

4 0
4 years ago
Given f(x)=x2 - 10x + 22, what is the domain off?
frez [133]

Answer:

D all real numbers and B

Step-by-step explanation:

i got them right on edg

4 0
3 years ago
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