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3 years ago

YOU KNOW THE DRILL! First CORRECT answer will get BRAINLIEST!

Mathematics

1 answer:

Effectus [21]3 years ago

4 0

Answer:

91 cm^2

Step-by-step explanation:

The bottom rectangle has an area of

A = l*w = 5* 14 =70

The top right rectangle has an area of

A = 3 *7 = 21

Add the areas together

A = 70+21 = 91 cm^2

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What is 31)775 please someone help me

Pavlova-9 [17]

Answer:1/25 or 0.04

Step-by-step explanation: How I Got This Answer Was i did 77 divided by 31 and got 2 then brought down the 15 and then brought down the 5 to make 155 and the i did 155 divided by 31 and got 5 31 times 5 = 155 when you simplify the answer it comes up to 1/25.

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3 years ago

In 2009, it was estimated that $3.6 billion was spent in advertising on Internet search engines. This was a 25% increase over th

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Answer:

2.7 billion

Step-by-step explanation:

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3 years ago

Deshaun is fertilizing his garden. The garden is in the shape of a rectangle. Its length is 14 feet and its width is 11 feet. Su

Fudgin [204]

Answer:

length x width = area

14 x 11 = 154

154 / 22 = 7 fertilizer needed

Hope this helps

Step-by-step explanation:

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3 years ago

A standard deck of cards contains 52 cards. One card is selected from the deck. Compute the probability of randomly selecting a

lisabon 2012 [21]

P(selecting a 10)= 4/52
P(selecting a 2)= 4/52
P(selecting a 4)=4/52
P(selecting an Ace)=4/52
P(selecting a diamond)=13/52

3 0

3 years ago

A computer retail store has 1414 personal computers in stock. A buyer wants to purchase 33 of them. Unknown to either the retail

Lorico [155]

Answer:

a) 364 ways

b) 45.33% probability that exactly one of the computers will be defective.

c) 54.67% probability that at least one of the computers selected is defective.

Step-by-step explanation:

The computers are chosen without replacement, so we use the hypergeometric distribution to solve this question.

Hypergeometric distribution:

The probability of x sucesses is given by the following formula:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

In which:

x is the number of sucesses.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

In this question:

14 computers, so N = 14.

3 defective, so k = 3.

3 will be purchesed, so n = 3.

A) In how many different ways can the 3 computers be chosen?

3 from a set of 14. So

$C_{14,3} = \frac{14!}{3!(14-3)!} = 364$

364 ways

B) What is the probability that exactly one of thecomputers will be defective?

This is P(X = 1).

$P(X = 1) = h(1,14,3,3) = \frac{C_{3,1}*C_{11,2}}{C_{14,3}} = 0.4533$

45.33% probability that exactly one of the computers will be defective.

C) What is the probability that at least one of the computers selected is defective?

Either none is, or at least one is. The sum of the probabilities of these events is 1. So

$P(X = 0) + P(X \geq 1) = 1$

We want $P(X \geq 1)$ . Then

$P(X \geq 1) = 1 - P(X = 0)$

In which

$P(X = 0) = h(0,14,3,3) = \frac{C_{3,0}*C_{11,3}}{C_{14,3}} = 0.4533$

$P(X \geq 1) = 1 - P(X = 0) = 1 - 0.4533 = 0.5467$

54.67% probability that at least one of the computers selected is defective.

5 0

3 years ago