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jeka57 [31]
3 years ago
13

The lengths of a lawn mower part are approximately normally distributed with a given mean mc021-1.jpg = 4 in. and standard devia

tion mc021-2.jpg = 0.2 in. What percentage of the parts will have lengths between 3.8 in. and 4.2 in.?
Mathematics
2 answers:
Aleonysh [2.5K]3 years ago
5 0
<span>The best answer that is given to the question that is being presented above would be 68%. Since it is normally distributed and the lengths' range fall between the first lower and upper standard deviations of the distribution (which is 68%), then the answer is 68%. </span>
Lostsunrise [7]3 years ago
5 0

Answer: 68

Step-by-step explanation:

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Which polynomial matches the expression -x(x – 5)?x2 – 5x x2 + 5x -x2 + 5x -2x – 5
Leno4ka [110]

Answer:

-x2 + 5x

Step-by-step explanation:

See below.

The graphs are the same

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3 years ago
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dem82 [27]

Answer:

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2 years ago
What is the equation in point-slope form of a line perpendicular to y= ⅕ x+8, through the point (-2, 3) *
ivolga24 [154]

Answer:

it was right but ok

Step-by-step explanation:

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4 0
3 years ago
If two lines are parallel which statement must be true? A.Their slopes are zero. B.Their slopes are negative reciprocals. C. The
stepan [7]

Answer:

D

Step-by-step explanation:

Parallel lines have the same gradient.

A line with a slope of zero is a horizontal line. Although two lines that have a slope of zero will result in two parallel lines, not all parallel lines are horizontal lines. Since the question is asking for which statement <u>must</u> be true, option A is incorrect.

If the slopes of two lines are negative reciprocals, they are perpendicular to each other. This is because the product of the gradients of 2 perpendicular lines is -1. Let the gradient of the first line be A and the other be B.

AB= -1

A =   - \frac{ 1}{B}

B =  -  \frac{1}{A}

Thus, option B is incorrect too.

Undefined slopes gives vertical lines. Like option A, if two lines have an undefined slope, they will be parallel to each other. However since parallel lines are nit necessarily vertical lines, option C is also incorrect.

4 0
2 years ago
Read 2 more answers
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