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2 years ago

If you write all of the whole numbers from 1 to 1000, how many numbers have the digit 4?

Mathematics

1 answer:

Simora [160]2 years ago

4 0

A.)
There are 400 4’s counting to one thousand

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A machine has four components, A, B, C, and D, set up in such a manner that all four parts must work for the machine to work pro

olchik [2.2K]

Answer:

0.756

Step-by-step explanation:

It is given that a machine has four components, A, B, C, and D.

$P(A)=P(B)=0.93, P(C)=0.95,P(D)=0.92$

If these components set up in such a manner that all four parts must work for the machine to work properly.

We need to find the probability that the machine works properly. It means we have to find the value of $P(A\cap B\cap C\cap D)$ .

If two events X and Y are independent, then

$P(X\cap Y)=P(X)\times P(Y)$

Assume the probability of one part working does not depend on the functionality of any of the other parts.

$P(A\cap B\cap C\cap D)=P(A)\times P(B)\times P(C)\times P(D)$

Substitute the given values.

$P(A\cap B\cap C\cap D)=0.93\times 0.93\times 0.95\times 0.92$

$P(A\cap B\cap C\cap D)=0.7559226$

$P(A\cap B\cap C\cap D)\approx 0.756$

Therefore, the probability that the machine works properly is 0.756.

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2 years ago

During the holiday sale, Deal of the Day sold radios and sweaters in the ratio 5:8. The store sold a total of 26 items. How many

poizon [28]

let's common be "x" 8x add 5x equal to 13 x now x equal to 26 devise 13 equal to 2,. so ans is 2

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2 years ago

What is the area of the shaded region? (picture is below) pls help me :((

DedPeter [7]

Answer:

its 210

Step-by-step explanation:

area of rect is 20×12=240

tri angle area=1/2×5×12=30

so 240-30=210

HOPE THIS HELPS!!

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2 years ago

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What is the answer to the word problem The cost of a gallon of orange juice is $3.50. What is the maximum number of containers y

Luda [366]

Answer: 4

Step-by-step explanation: you use division, or your calculator, divide $15.00 by $3.50 and you get 4.28, so you can by 4 full gallons with $1.00 left over!

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3 years ago

Kurt can make $62 in 5 hours. How much does he make per hour?

swat32

Answer:

$12.40

Step-by-step explanation:

62/5=12 2/5

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1 year ago