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Mnenie [13.5K]
3 years ago
5

MrHarrisistilinghisbathroomNloor. The bathroom Nloor is a rectangle measuring 4m by 2m. Each tile is 20cm by 20cm. How many tile

s does he need?
Mathematics
1 answer:
antiseptic1488 [7]3 years ago
6 0

Answer:

200

Step-by-step explanation:

First, we know that 1 meter=100 centimeters, so we need to find a common measurement. Lets right it all as meters, so we dont get confused. Then we can find the total area of the floor by multiplying the too side lengths together:

400 centimeters x 200 centimeters= 80000 centimeters!

The total area of the floor is 80,000 centimeters

Now find the area of each tile:

20 centimeters x 20 centimeters= 400 centimeters

Now to find how many of those tiles can fit in that floor, we divide 80,000 by 400.

80,000/400=200

He needs 200 tiles.

Hope this helps!

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Given the radius of a cone is 4 cm and its volume is 134 square cm, which of the following is closest to its height?
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ABC Auto Insurance classifies drivers as good, medium, or poor risks. Drivers who apply to them for insurance fall into these th
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Answer:

a.P(E_1/A)=0.0789

b.P(E_2/A)=0.395\

c.P(E_3/A)=0.526

Step-by-step explanation:

Let E_1,E_2,E_3 are the events that denotes the good drive, medium drive and poor risk driver.

P(E_1)=0.30,P(E_2)=0.50,P(E_3)=0.20

Let A be the event that denotes an accident.

P(A/E_1)=0.01

P(A/E_2=0.03

P(A/E_3)=0.10

The company sells Mr. Brophyan insurance policy and he has an accident.

a.We have to find the probability Mr.Brophy is a good driver

Bayes theorem,P(E_i/A)=\frac{P(A/E_i)\cdot P(E_1)}{\sum_{i=1}^{i=n}P(A/E_i)\cdot P(E_i)}

We have to find P(E_1/A)

Using the Bayes theorem

P(E_1/A)=\frac{P(A/E_1)\cdot P(E_1)}{P(E_1)\cdot P(A/E_1)+P(E_2)P(A/E_2)+P(E_3)P(A/E_3)}

Substitute the values then we get

P(E_1/A)=\frac{0.30\times 0.01}{0.01\times 0.30+0.50\times 0.03+0.20\times 0.10}

P(E_1/A)=0.0789

b.We have to find the probability Mr.Brophy is a medium driver

P(E_2/A)=\frac{0.03\times 0.50}{0.038}=0.395

c.We have to find the probability Mr.Brophy is a poor driver

P(E_3/A)=\frac{0.20\times 0.10}{0.038}=0.526

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3 years ago
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