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olga2289 [7]
3 years ago
9

What is the area of a rectangle 2m long and 40cm wide​

Mathematics
1 answer:
wariber [46]3 years ago
7 0

Answer:

8000 cm^2 or 8 m^2

Step-by-step explanation:

We can convert 2 meters to centimeters, simply by multiplying the ,meters value by 100. So, the converted dimensions of the rectangle are 200 cm by 40 cm. Multiplying to get the area, we have 8000 cm^2. This could also be expressed in terms of m^2 as 8 m^2.

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What is the value of x
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Answer:

Step-by-step explanation:

Looking at the diagram,

Line DT is parallel to line line BM, therefore, triangle DHT is similar to triangle BHM. This means that

DH/DB = TH/MH

DH = 15 + 6 = 21

TH = 9 + x

Therefore

(9 + x)/21 = 9/6

Cross multiplying, it becomes

6(9 + x) = 21 × 9 = 189

54 + 6x = 189

Subtracting 54 from the left hand side and the right hand side of the equation, it becomes

6x + 54 - 54 = 189 - 54

6x = 135

Dividing the left hand side and the right hand side of the equation by 6, it becomes

6x/6 = 135/6

x = 22.5

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Which figure takes a rotation of 360° to carry it onto itself? (consider each figure a regular polygon)
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Step-by-step explanation:

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3 years ago
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A study wanted to assess the accuracy of self-reported smoking status. Participants are asked whether they currently smoke or no
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Answer: a) 0.7878, b) 0.8723

Step-by-step explanation:

Since we have given that

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Self-reported non smoker                  82                                      14

Self-reported smoker                          12                                      52

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P(smoker|Nicotine\ present)=\dfrac{52}{52+14}=\dfrac{52}{66}=0.7878

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Hence, a) 0.7878, b) 0.8723

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3 years ago
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