Don’t say A or B!!!! Just help me plz and thx

Mathematics

2 answers:

defon3 years ago

5 0

A)P = 2l+2w
P =2l+2w≥40 should be
2*6+2w≥40
12+2w≥40
2w≥40-12, 2w≥28
b) 2w≥28
w≥14
so smallest is 14

oee [108]3 years ago

4 0

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Information Given
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Perimeter of a Parallelogram = 2l + 2w
Given that length = 6 feet and Perimeter is no less that 40 feet

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Construct the inequality
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2(6) + 2w ≥ 40

12 + 2w ≥ 40

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Take away 12 from both sides
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2w ≥ 40 - 12

2w ≥ 28

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Divide by 2 on both sides
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w ≥ 14

The smallest possible value of the width is 14 feet

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Answer (a) inequality: 12 + 2w ≥ 40 (b) Smallest value of w = 14.
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A gondola (cable car) at a ski area holds 50 people. Its maximum safe load is 10000 pounds. A population of skiers has a distrib

fenix001 [56]

Answer: 0.03855

Step-by-step explanation:

Given :A population of skiers has a distribution of weights with mean 190 pounds and standard deviation 40 pounds.

Its maximum safe load is 10000 pounds.

Let X denotes the weight of 50 people.

As per given ,

Population mean weight of 50 people = $\mu=50\times190=9500\text{ pounds}$

Standard deviation of 50 people $=\sigma=40\sqrt{50}=40(7.07106781187)=282.84$

Then , the probability its maximum safe load will be exceeded =

$P(X>10000)=P(\dfrac{X-\mu}{\sigma}>\dfrac{10000-9500}{282.84})\\\\=P(z>1.7671-8)\\\\=1-P(z\leq1.7678)\ \ \ \ [\because\ P(Z>z)=P(Z\leq z)]\\\\=1-0.96145\ \ \ [\text{ By p-value of table}]\\\\=0.03855$