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Mashcka [7]
2 years ago
12

Find the circumference of each circle. Use 3.14 for the value of π . Round answer to the nearest tenth.

Mathematics
2 answers:
kvv77 [185]2 years ago
8 0

Answer:

C=9.4\pi meters

Step-by-step explanation:

Recall to find the circumference of a circle the formula is C=\pi d or C=2\pi r.

We start by substituting 4.7m for r in the second circumference formula.

C=2\pi r\\C=2\pi (4.7)\\C=9.4\pi. We input this value of r into the area formula.


makvit [3.9K]2 years ago
4 0

Answer:

its C.

Step-by-step explanation:

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An aluminum rod 0.500 m in length and with a cross-sectional area of 2.20 cm2 is inserted into a thermally insulated vessel cont
netineya [11]

Answer:

a). V_{He}   = 14.6208 litres : b). = 0.29844 Litres/sec

Step-by-step explanation:

a).

Step 1.

Volume when one half of rod is inserted = (50/2)*(2.2) = 55cm³

Step 2.

As we know that,

V_{He} = (ρV_{c}IΔT)_{Al} / (ρL_{v})H_{c}                     where H_{c} = 290 - 4.2 = 285.8K

                                                        sepecififc heat of aluminum = 0.215 cal/g

                                                                                      density = 2.7 g/cm3

      = (2.7)*(55)*(0.215)*(285.8) / (0.125)*(20900)*(1/4186)

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b).

Step 1.

As we know that

  P = kA(dT/dx) = 31*2.2*[(290-4.2)/25]

                         = 779.6624 W

Step 2.

Now, approximate boil rate of helium is:

P/ρL_{v}= [(779.6624)*(10^3g/kg)] / [(0.125)*(20900)]

         = 0.29844 Litres/sec

6 0
2 years ago
Choose the best definition for the following phrase: combining like terms
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I'm assuming you are talking about polynomials.

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Then the like terms here are:

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Please help!! I have 10 minutes left!!
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1. Answer:

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Step-by-step explanation:

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The median can be found in the 50-59 bin or interval.

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Step-by-step explanation:

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