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Natali [406]
4 years ago
9

Capacity (megawatts)

Mathematics
1 answer:
Lerok [7]4 years ago
5 0

Answer:

The answer is B) 8445

Step-by-step explanation:

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The lifetime of a certain brand of battery is known to have a standard deviation of 9 hours. Suppose that a random sample of 90
Rina8888 [55]

Answer:

lower limit : 36.44

upper limit : 39.56

Step-by-step explanation:

Given :

s = 9

n = 90

x = 38.9

Alpha, α = 0.10

∴ $z_{\alpha/2}=z_{0.05} = 1.645$

The confidence interval is :

$=x \pm\left(z_{\alpha /2} \times \frac{s}{\sqrt{n}}\right)$

$=38.9 \pm\left(1.645 \times \frac{9}{\sqrt{90}}\right)$

$=38.9 \pm 1.56$

$=(36.44, 39.56)$

Therefore,

lower limit : 36.44

upper limit : 39.56

3 0
3 years ago
Cathy used a probability simulator to pull 3 colored marbles from a bag and flip a coin 50 times. The results are shown in the t
aliya0001 [1]

Answer:

blue marble 12/50. tails 20/50

Step-by-step explanation:

12/50×20/50 =240/2500= 12/125 =9.6%

5 0
3 years ago
Given g(x) = 3x+3, find g(6)
Anarel [89]

Answer:

g(6)=21

Step-by-step explanation:

Given g(x)= 3x+3, Find g(6)

1. Replace g(x) with g(6), and x with 6. The equation will now look like this: g(6)=3(6)+3

2. Multiply 3 and 6, to equal 18. The equation will now look like this: g(6)=18+3

3. Add 18 and 3 to equal 21. The Answer is g(6)=21

7 0
4 years ago
Please help i will give brainliest
siniylev [52]

Answer:

The correct statement is D)

Step-by-step explanation:

To get this equation into slope-intercept form, you need to isolate the variable y on the left. 2y - 3x = -4 ⇒ 2y = 3x - 4 ⇒ y = \frac{3}{2}x - 2. The slope would be \frac{3}{2} which is positive, and the y-intercept is -2, which is negative.

6 0
3 years ago
Two numbers multiply to -24 and add up to -5
svlad2 [7]

Answer:

-8 and 3

Step-by-step explanation:

6 0
3 years ago
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