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nikdorinn [45]
3 years ago
5

Please help i will give brainleist and 25 points please dont play please

Mathematics
1 answer:
UkoKoshka [18]3 years ago
7 0

Step-by-step explanation:

1)90-50= 40°

2)90-25= 65°

3)90-80=10°

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8 people fix comfortably in a 3 foot by 3 foot area. use this value to estimate the size of a crowd that is 6 feet deep on both
butalik [34]

Answer:

number of people=56320

Step-by-step explanation:

area of street=2×1760×3×6=63360 cm²

number of people={63360÷(3× 3)}× 8=7040× 9=56320

7 0
3 years ago
There are 90 passengers on a commuter flight from SFO to LAX, of whom 27 are traveling on business. In a random sample of five p
stepladder [879]

Answer:

C). 0.83193

Step-by-step explanation:

There are total of 90 passengers of which 27 are for business.

The probability of passengers for business = 27/90

The probability of passengers for business p = 0.3

The probability of passengers not for business q = 1-The probability of passengers for business

= 1-0.3

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Random sample of 5 passenger, probability of at least one business passenger = 1 - probability of no business passenger

probability of no business passenger

= 5C0(0.3)^0 * (0.7)^5

= 1 *1*0.16807

= 0.16807

probability of at least one business passenger = 1 - probability of no business passenger

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=0.83193

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3 years ago
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A grower believes that one in five of his citrus trees are infected with the citrus red mite. How large a sample should be taken
kotegsom [21]

Answer: 68

Step-by-step explanation:

Formula for sample size when prior estimate of population proportion (p) is available:  n=p(1-p)(\dfrac{z^*}{E})^2

, where z*= critical-value.

E= Margin of error.

Let p be the population proportion of  trees are infected with the citrus red mite.

As per given , we have

p=\dfrac{1}{5}=0.2

E= ± 0.08

The critical z-value corresponding to 90% confidence level = z*=1.645

Substitute all the values in the above formula , we get

Required sample size  :n=(0.2)(1-0.2)(\dfrac{(1.645)}{0.08})^2

\Rightarrow\ n=(0.2)(0.8)(20.5625)^2

\Rightarrow\ n=0.16(422.81640625)\\\\\Rightarrow\ n=67.650625\approx68 [Rounded to next integer.]

Thus, the minimum sample size should be taken =68

6 0
3 years ago
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Travka [436]

Answer:

12

Step-by-step explanation:

8 0
3 years ago
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