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2 years ago

The length of a field is 100 yards and its width is 75 yards. If 1 inch represents 25 yards, what would be the dimensioi

Mathematics

1 answer:

Ilia_Sergeevich [38]2 years ago

7 0

Answer:

b. 4 inches by 3inches.

Step-by-step explanation:

Length on the paper = 100/25 = 4 inches

Width on the paper = 75/25 = 3 inches.

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Suppose 10000 people are given a medical test for a disease. About1% of all people have this condition. The test results have a

Alina [70]

Answer:

The percent of the people who tested positive actually have the disease is 38.64%.

Step-by-step explanation:

Denote the events as follows:

X = a person has the disease

P = the test result is positive

N = the test result is negative

Given:

$P(X)=0.01\\P(P|X^{c})=0.15\\P(N|X)=0.10$

Compute the value of P (P|X) as follows:

$P(P|X)=1-P(P|X^{c})=1-0.15=0.85$

Compute the probability of a positive test result as follows:

$P(P)=P(P|X)P(X)+P(P|X^{c})P(X^{c})\\=(0.85\times0.10)+(0.15\times0.90)\\=0.22$

Compute the probability of a person having the disease given that he/she was tested positive as follows:

$P(X|P)=\frac{P(P|X)P(X)}{P(P)}=\frac{0.85\times0.10}{0.22} =0.3864$

The percentage of people having the disease given that he/she was tested positive is, 0.3864 × 100 = 38.64%.

3 0

3 years ago

a racing car starts fron rest .if it gains an acceleration of 5m/second square in 10 second ,calculate the final velocity.

hjlf

Answer:

The final velocity would be 50 m/s.

Its by formula,

$a = \frac{v - u}{t}$

hope it helps...

3 0

3 years ago

Given the function f(x)=x^2+2x+1, find: f( 1/a )

igor_vitrenko [27]

Answer:

f(1/a) = 1/a² + 2/a + 1

Step-by-step explanation:

Step 1: Define

f(x) = x² + 2x + 1

f(1/a) is x = 1/a

Step 2: Substitute and Evaluate

f(1/a) = (1/a)² + 2(1/a) + 1

f(1/a) = 1/a² + 2/a + 1

5 0

3 years ago

A swimming pool had 2.52.52, point, 5 million liters of water in it. Some water evaporated, and then the pool only had 222 milli

kirza4 [7]

The swimming pool had 2.5 million liters of water in it

After some was evaporated , the remaining was 2 million liters

2.5 millions...................100%

2 millions........................x

x = (2/2.5)*100% = 80 %

This means that (100-80)%------ > 20% (0.5 million liters) was evaporated

3 0

3 years ago

Read 2 more answers

Send help ??? please

ch4aika [34]

Answer: One solution

Step-by-step explanation:

The two lines only intersect at one point, (-9,-23)

8 0

3 years ago

Read 2 more answers