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3 years ago

Similar to my last question:

Mathematics

1 answer:

pickupchik [31]3 years ago

6 0

70 × 20%
70 × .20 = .14
so .70 - .14 = $.56

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Andrew [12]

Answer:

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Step-by-step explanation:

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4 0

2 years ago

[Q71 Suppose that the height, in inches, of a 25-year-old man is a normal random variable with parameters g = 71 inch and 02 = 6

viktelen [127]

Answer: (a) Percentage of 25 year old men that are above 6 feet 2 inches is 11.5%.

(b) Percentage of 25 year old men in the 6 footer club that are above 6 feet 5 inches are 2.4%.

Step-by-step explanation:

Given that,

Height (in inches) of a 25 year old man is a normal random variable with mean $g=71$ and variance $o^{2} =6.25$ .

To find: (a) What percentage of 25 year old men are 6 feet, 2 inches tall

(b) What percentage of 25 year old men in the 6 footer club are over 6 feet. 5 inches.

Now,

(a) To calculate the percentage of men, we have to calculate the probability

P[Height of a 25 year old man is over 6 feet 2 inches]= P[X> $74in$ ]

P[X>74] = P[ $\frac{X-g}{o}$ > $\frac{74-71}{2.5}$ ]

= P[Z > 1.2]

= 1 - P[Z ≤ 1.2]

= 1 - Ф (1.2)

= 1 - 0.8849

= 0.1151

Thus, percentage of 25 year old men that are above 6 feet 2 inches is 11.5%.

(b) P[Height of 25 year old man is above 6 feet 5 inches gives that he is above 6 feet] = P[X, $6ft$ $5in$ - X, $6ft$ ]

P[X > $6ft$ $5in$ I X > $6ft$ ] = P[X > 77 I X > 72]

= $\frac{P[X > 77]}{P[ X > 72]}$

= $\frac{P[\frac{X - g}{o}>\frac{77-71}{2.5}] }{P[\frac{X-g}{o} >\frac{72-71}{2.5}] }$

= $\frac{P[Z >2.4]}{P[Z>0.4]}$

= $\frac{1-P[Z\leq2.4] }{1-P[Z\leq0.4] }$

= $\frac{1-0.9918}{1-0.6554}$

= $\frac{0.0082}{0.3446}$

= 0.024

Thus, Percentage of 25 year old men in the 6 footer club that are above 6 feet 5 inches are 2.4%.

4 0

3 years ago

Which number line model represents 1 + (-3)?

a_sh-v [17]

<span>Which number line model represents 1 + (-3)?</span><span>
-2
*Are there any options though?*</span>

6 0

3 years ago

Need help on ratio table

guajiro [1.7K]

80.8, 40.4, 20.2, 10.1 (the numbers are going in half.)

1024, 512, 256, 128. (also going in half.)

5 0

3 years ago

Priya bought these ítems at the grocery store. Find each unit price.

goblinko [34]

Answer:

Eggs: 25 cents ea.

Pounds of peanuts: $2.50 ea.

Rolls of toilet paper: 50 cents ea.

Apples: 35 cents ea.

Step-by-step explanation:

This is assuming you meant $3 for 12 eggs, and $2 for 4 rolls of toilet paper.

For the eggs, I did 3 / 12 = .25 (aka 25 cents);

For the peanuts: 7.50 / 3 = $2.50;

For the toilet paper: 2 / 4 = .50 (aka 50 cents);

For the apples: 3.50 / 10 = .35 (aka 35 cents).

Hope this helped ~

6 0

3 years ago