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1 year ago

30 POINTS FOR ONE QUESTION!!!!

Mathematics

2 answers:

Westkost [7]1 year ago

5 0

Answer:

900.

Step-by-step explanation:

1) the initial area is: A₀=0.5*base*h;

2) the final area is: A=0.5*(5*base)*(5*h).

It means, that 25A₀=A, then A=900 [cm²].

notsponge [240]1 year ago

4 0

The answer to this question would be 900cm :)

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2 years ago

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A factory received a shipment of 11 hammers, and the vendor who sold the items knows there are 2 hammers in the shipment that ar

zhenek [66]

Question:

If a sample of 2 hammer is selected

(a) find the probability that all in the sample are defective.

(b) find the probability that none in the sample are defective.

Answer:

a $Pr = \frac{2}{110}$

b $Pr = \frac{72}{110}$

Step-by-step explanation:

Given

$n = 11$ --- hammers

$r = 2$ --- selection

This will be treated as selection without replacement. So, 1 will be subtracted from subsequent probabilities

Solving (a): Probability that both selection are defective.

For two selections, the probability that all are defective is:

$Pr = P(D) * P(D)$

$Pr = \frac{2}{11} * \frac{2-1}{11-1}$

$Pr = \frac{2}{11} * \frac{1}{10}$

$Pr = \frac{2}{110}$

Solving (b): Probability that none are defective.

The probability that a selection is not defective is:

$P(D') = \frac{9}{11}$

For two selections, the probability that all are not defective is:

$Pr = P(D') * P(D')$

$Pr = \frac{9}{11} * \frac{9-1}{11-1}$

$Pr = \frac{9}{11} * \frac{8}{10}$

$Pr = \frac{72}{110}$

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2 years ago

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vekshin1

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Step-by-step explanation:

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2 years ago

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