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lapo4ka [179]
2 years ago
15

For brainliest!!!! please help :)

Mathematics
1 answer:
Crazy boy [7]2 years ago
3 0

Answer:

area = 572.3 m²

Step-by-step explanation:

area = PiR²

r = 27/2

area = (3.14)(13.5²)

area = 572.3 m²

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David drove 224 miles in 4 hours What is constant speed of David?
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He drove 56mph.

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Jessica sells 50.5 ounces of lemonade for a total of 20.20.
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2.5

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A rectangle has one side of 8 cm. How fast is the diagonal of the rectangle changing at the instant when the other side is 6 cm
lisov135 [29]
<h2>The diagonal is increasing at 1.8 cm/minute.</h2>

Step-by-step explanation:

Let l be one side,w be other side and s be diagonal.

We have

             s² = l² + w²

We have

          l = 8 cm

          w = 6 cm

           s² = l² + w²  

           s² = 8² + 6²

           s² = 100

           s = 10 cm

Taking derivative with respect to time in s² = l² + w²

           s^2=l^2+w^2\\\\2s\frac{ds}{dt}=2l\frac{dl}{dt}+2w\frac{dw}{dt}\\\\s\frac{ds}{dt}=l\frac{dl}{dt}+w\frac{dw}{dt}\\\\\frac{dw}{dt}=3cm/min\\\\\frac{dl}{dt}=0cm/min\\\\10\frac{ds}{dt}=8\times 0+6\times 3\\\\\frac{ds}{dt}=1.8cm/min

The diagonal is increasing at 1.8 cm/minute.

7 0
3 years ago
What is the value of x?
Morgarella [4.7K]

Answer:

91.5

Step-by-step explanation:

I did the math. Add up all the numbers and then, divide the result by two to get 91.5

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If you get paid $15 and hour, how much would time and a half be?
madam [21]

Answer: If you mean five instead of time, then the answer would be 82.5

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15 × 5.5 = 82.5

4 0
3 years ago
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