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Serggg [28]
3 years ago
8

20 points!

Mathematics
1 answer:
solniwko [45]3 years ago
6 0

Answer:

1/2

Step-by-step explanation:

slope equals rise over run, so you go from your first point which is (0,0) and go up to (2,1), so you rise one and then go over 2, which gives you 1/2

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Twenty five heat lamps are connected in a greenhouse so, that when one lamp fails, another takes over immediately (only one lamp
olga55 [171]

Answer:

P = 0.006

Step-by-step explanation:

Given

n = 25 Lamps

each with mean lifetime of 50 hours and standard deviation (SD) of 4 hours

Find probability that the lamp will be burning at end of 1300 hours period.

As we are not given that exact lamp, it means we have to find the probability where any of the lamp burning at the end of 1300 hours, So we have

Suppose i represents lamps

P (∑i from 1 to 25 (X_i > 1300)) = 1300

= P(X^{'}> \frac{1300}{25})                  where X^{'} represents mean time of a single lamp

= P (Z> \frac{52-50}{\frac{1}{\sqrt{25}}})                Z is the standard normal distribution which can be found by using the formula

Z = Mean Time (X^{'}) - Life time of each Lamp (50 hours)/ (SD/\sqrt{n})

Z = (52-50)/(4/\sqrt{25}) = 2.5

Now, P(Z>2.5) = 0.006 using the standard normal distribution table

Probability that a lamp will be burning at the end of 1300 hours period is 0.006

4 0
3 years ago
What is the degree of these polynomials?​
san4es73 [151]

Answer:

5 and 2

Step-by-step explanation:

Degree is the highest power of the polynomial

4 0
3 years ago
Read 2 more answers
What is 43.043 in expanded form
nordsb [41]
40+3+.04+.003 

expanded form is showing what you have to add together


3 0
3 years ago
These figures are....
Murrr4er [49]
The answer would be C because the first figure is half of every number on the second figure making it similar it’s not congruent because there not the same size
5 0
2 years ago
A six-sided die is rolled eleven times. What is the probability that the die will show an even number exactly nine times?
Black_prince [1.1K]

Answer:

It is D

Step-by-step explanation:

6 x 11 = 66

3 x 9 = 27

4 0
2 years ago
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