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2 years ago

1. 48 cm2. 30 cm3. 24 cm4. 54 cmwhat's the answer

Mathematics

1 answer:

rjkz [21]2 years ago

6 0

Step-by-step explanation:

The answer is definitely 2.

which is 30 cm

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Ludmilka [50]

Is it number 21 you need help with?

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2 years ago

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If the sum of four consecutive numbers is 854, what is the third one?

lukranit [14]

Answer:

214

Step-by-step explanation:

The set up would be x + (x + 1) + (x + 2) + (x + 3) = 854, naturally as the numbers are consecutive. Solving for x:

x + (x + 1) + (x + 2) + (x + 3) = 854,

x + x + 1 + x + 2 + x + 3 = 854,

4x + 1 + 2 + 3 = 854,

4x + 6 = 854,

4x = 854 - 6 = 848,

x = 848/4 = 212

The third number then should be 212 + 2 = 214

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2 years ago

A student answers a multiple-choice examination question that offers four possible answers. Suppose the probability that the stu

Nitella [24]

Answer: 0.9730

Step-by-step explanation:

Let A be the event of the answer being correct and B be the event of the knew the answer.

Given: $P(A)=0.9$

$P(A^c)=0.1$

$P(B|A^{C})=0.25$

If it is given that the answer is correct , then the probability that he guess the answer $P(B|A)= 1$

By Bayes theorem , we have

$P(A|B)=\dfrac{P(B|A)P(A)}{P(B|A)P(A)+P(C|A^c)P(A^c)}$

$=\dfrac{(1)(0.9)}{(1))(0.9)+(0.25)(0.1)}\\\\=0.972972972973\approx0.9730$

Hence, the student correctly answers a question, the probability that the student really knew the correct answer is 0.9730.

7 0

2 years ago

Pls tell the answer pls

Crank

Answer:

The correct answer is C

Step-by-step explanation:

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IRISSAK [1]

the answer is above.

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2 years ago

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1. 48 cm2. 30 cm3. 24 cm4. 54 cmwhat's the answer​

1. 48 cm2. 30 cm3. 24 cm4. 54 cmwhat's the answer