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alekssr [168]
2 years ago
11

Please help . I’ll mark you as brainliest if correct

Mathematics
1 answer:
Oxana [17]2 years ago
8 0

Answer:

30m

Step-by-step explanation:

51-21=30 that is the length of the long piece

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The promising alternative energy sources currently under development are fuel cell technology and large-scale solar energy power
Mumz [18]

Answer:

Step-by-step explanation:

a) Denote the event of commercially availability of f_uel cell technology as F_, commercial availability of solar power technology as S

Write the probability of energy supplied by these energy sources in the next 10 years  

P(energy supplied) = P(S ∪ F) -----(1)

Rewrite eqn (1)

P(energy supplied) = P(S) + P(F) - P(F) P(S) ----(2)

substitute 0.85 for P(S) and 0,7 for P(F) in eqn (2) to find the probability of energy supplied by these energy sources

P(energy supplied) = 0.85 + 0.7 - (0.7 * 0.85)

= 0.85 + 0.7 - (0.595)

= 1.55 - 0.595

= 0.955

Therefore, the probability that there will be energy supplied by these two alternative sources in the next 10 years is 0.955

B) write the probability of only one source of energy available

P(only one source of energy available) = P(\bar F S) ∪ P( \bar S F) ---(3)

Rewrite the equation (3)

P(only one source of energy available) =

=P(\bar F S)+P(\bar S F)\\\\=\{[1-P(F)]P(S)+[1-P(S)]P(F)\}---(4)

=\{[1-0.7]0.85+[1-0.85]0.7\}\\\\=0.255+0.105\\\\=0.36

Therefore,The probability that only one of the two alternative energy sources will be commercially viable in the next 10 years is 0.36

4 0
2 years ago
Does the graph represent a function?
AlekseyPX

Answer:

no it does not you can identify that by doing the vertical line test

Step-by-step explanation:

7 0
3 years ago
I need helpppppppp!!!!
kati45 [8]

What do you need help with?

8 0
2 years ago
As a fraction in simplest terms, what would you multiply the first number by to get the second?
Alinara [238K]

Answer:

22/25

Step-by-step explanation:

66/75 = 22/25

Input into equation to confirm

75 · 22/25 = 66

1650/25 = 66

66 = 66, so we're right

5 0
2 years ago
−2x−x+8= please aswer
shusha [124]

Answer:

-3x+8

Step-by-step explanation:

=-2x+-x+8

=(-2x+-x)+(8)

=-3x+8

5 0
3 years ago
Read 2 more answers
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