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3 years ago

Select the statement that describes this expression: 32 ÷ 4 + ( fraction 1 over 2 x 16) − 2. (2 points)

Mathematics

2 answers:

PtichkaEL [24]3 years ago

5 0

Answer:

I'm pretty sure it's B.

Step-by-step explanation: Sorry if wrong :(

Basile [38]3 years ago

4 0

Answer:

Step-by-step explanation:

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[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

4 years ago

Find the perimeter of the rectangle.

timama [110]

Answer:

38 cm

Step-by-step explanation:

12 * 2 = 24

7 * 2 = 14

24 + 14 = 38

3 0

3 years ago

1.1.1 Write the total number of winners in the correct South African number format. <br>

prohojiy [21]

Answer:

As of February 2022, South Africa has played 449 Test matches resulting in 171 victories, 154 defeats and 124 draws for an overall winning percentage of 38.08. Statistics are correct as of South Africa v New Zealand at Hagley Oval, 1st Test, 17-19 February 2022.

Format

The way that something appears or is set out.

4 0

3 years ago

Read 2 more answers

A new bank customer with $4,000 wants to open a money market account. The bank is offering a simple interest rate of 1.4%. a.

erma4kov [3.2K]

Answer:

A = $1,120 B = $5120

Step-by-step explanation:

1.4/100 = 0.014

0.014 x 4000 = 56