Multiply: (x + 3)(x – 4) What is the middle term in the simplified product? x –x 3x -4x
2 answers:
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Answer:
Step-by-step explanation:
The square root of a perfect square is a rational number.
So let us take the square root of each number to see which is a rational number.
......irrational
......rational
.........irrational
irrational.
Therefore is a perfect square
Answer:
<em>The probability that the spark plugs are supposed to have a gap between 3.9mm and 4.3mm.</em>
<em>P(3.9≤X≤4.3) = 0.9922</em>
Step-by-step explanation:
<u><em>Step(i):-</em></u>
<em>Given that the mean of the Normal distribution = 4.1mm</em>
<em>Given that the standard deviation of the Normal distribution = 0.0075mm</em>
<em>Let 'X' be the random variable in a normal distribution</em>
Given that X₁ = 3.9mm
Given that X₂ = 4.3mm
<u><em>Step(ii):-</em></u>
<em>The probability that the spark plugs are supposed to have a gap between 3.9mm and 4.3mm.</em>
<em>P(3.9≤X≤4.3) = P(-2.666≤Z≤2.666)</em>
<em> = P(Z≤2.666)-P(Z≤-2.666)</em>
<em> = 0.5 +A(2.666) - (0.5-A(2.666)</em>
<em> = 2 × A(2.666)</em>
<em> = 2×0.4961</em>
<em> = 0.9922</em>
<u><em>Final answer:-</em></u>
<em>The probability that the spark plugs are supposed to have a gap between 3.9mm and 4.3mm.</em>
<em>P(3.9≤X≤4.3) = 0.9922</em>
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