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3 years ago

Help me do the ones marked in red.

Mathematics

1 answer:

Dmitrij [34]3 years ago

8 0

Answer:

2. "two thirds of the fourth power of r"

4. n + 14

6. 7 +11n

8. (2/5)n^2

7. 28

8. 1/5

Step-by-step explanation:

2. "two thirds of the fourth power of r"

4. "sum" means the listed items are added. You can use any convenient variable to represent "a number." I often use n for number.

n + 14

6. "7 more than" means 7 is added to whatever follows. "11 times a number" means the number is multiplied by 11.

7 + 11n

8. "of" means "times". The square of a number is that number to the power of 2.

(2/5)n^2

7 & 8 (evaluation). Your calculator can do this. (If not, get one that can.) Note that parentheses are needed around numerators and denominators and anything else that must be treated as a single value.

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Answer:

The dog will reach the tree first.

Step-by-step explanation:

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3 years ago

One in 1000 adults is afflicted with a rare disease forwhich a diagnostic test has been developed. The test is such,that when an

mel-nik [20]

Answer:

0.0893

Step-by-step explanation:

Let A be the event that the individual has the disease

Let Aⁿ be the event that the individual doesn't have the disease

Let B be the event of a positive result showing.

Now,

We are told One in 1000 adults is afflicted with the disease.

Thus;

P(A) = 1/1000 = 0.001

P(Aⁿ) = 1 - 0.001 = 0.999

Also,we are told that when an individual has the disease, a positive result will occur 98% of the time.

Thus;

P(A|B) = 98% = 0.98

Also, we are told that an individual without the disease will show a positive result only 1% of the time. Thus;

P(Aⁿ|B) = 1% = 0.01

Now, from fundamental rule, let's find P(B). Thus;

P(B) = [P(A|B) × P(A)] + [P(Aⁿ|B) × P(Aⁿ)]

P(B) = (0.98 × 0.001) + (0.01 × 0.999)

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Now, from Baye's theorem, If a randomly selected individual is tested and the result is positive, the probability that the individual has the disease is given by;

P(A|B) = [P(A|B) × P(A)]/P(B)

P(A|B) = (0.98 × 0.001)/0.01097

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3 years ago

The basic SI unit for measuring mass is the liter. True False

jeyben [28]

That is false, because you would measure with kilograms.

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4 years ago

Read 2 more answers