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Dimas [21]
3 years ago
12

Using 3.14 for pie what is the area of the circle to the nearest tenth of an inch

Mathematics
2 answers:
Nikitich [7]3 years ago
6 0

A = \pi {r}^{2}   \\  \\ r =  \frac{7.5}{2}  = 3.75

So

A = (3.14)({3.75}^{2} ) \\ A = (3.14)(14.0625) \\ A = 44.15625 \\ A =44.16

liraira [26]3 years ago
3 0

area =  \pi {r}^{2}  \\  r =  \frac{1}{2}  \times 7.5 = 3.75 \\ 3.14 \times 3.75  {}^{2}  \\ 3.75 {}^{2}  = 14.06 \\ 3.14 \times 14.06 = 44.1484 \: inches {}^{2}

hope that helped

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3√2

Step-by-step explanation:

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3 0
2 years ago
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In a 3-digit number, the hundreds digit is one more than the ones digit and the tens digit is twice the hundreds digit. If the s
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Answer:

The mentioned number in the exercise is:

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Step-by-step explanation:

To obtain the mentioned number in the exercise, first you must write the equations you can obtain with it.

If:

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  • y = tens digit
  • z = ones digit

We can write:

  1. x = z + 1 (the hundreds digit is one more than the ones digit).
  2. y = 2x (the tens digit is twice the hundreds digit).
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Taking into account these data, we can use the third equation and replace it to obtain the number and the value of each digit:

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  • z + 1 + y + z = 11
  • z + z +y + 1 = 11 (we just ordered the equation)
  • 2z + y + 1 = 11 (z + z = 2z)
  • 2z + y = 11 - 1 (we passed the +1 to the other side of the equality to subtract)
  • 2z + y = 10
  • 2z + (2x) = 10 (remember y = 2x)
  • 2z + 2x = 10
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Now, we know z (the ones digit) is 2, we can use the first equation to obtain the value of x:

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And we'll use the second equation to obtain the value of y (the tens digit):

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Organizing the digits, we obtain the number:

  • Number = xyz
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As you can see, <em><u>the obtained number is 362</u></em>.

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