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Montano1993 [528]
3 years ago
7

Karen and Kristen were in a competition to see who could walk the

Mathematics
1 answer:
Gelneren [198K]3 years ago
5 0

Answer:

They each walked the same amount if you plug 7 into each of their expressions

Step-by-step explanation:

Karen walked 3(7) - 4 or 17 miles

Kristen walked 2(7) + 3 or 17 miles

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7. A machine produces memory sticks of varying lengths, distributed uniformly between 3mm and 13 mm. Memory sticks longer than 1
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Answer:

The proportion of memory sticks that will be scrapped is 0.3 = 30%.

Step-by-step explanation:

Uniform probability distribution:

An uniform distribution has two bounds, a and b.  

The probability of finding a value of at lower than x is:

P(X < x) = \frac{x - a}{b - a}

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P(c \leq X \leq d) = \frac{d - c}{b - a}

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P(X > x) = \frac{b - x}{b - a}

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Calculate the proportion of memory sticks that will be scrapped:

P(X > 10) = \frac{13 - 10}{13 - 3} = \frac{3}{10} = 0.3

The proportion of memory sticks that will be scrapped is 0.3 = 30%.

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