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katrin2010 [14]
3 years ago
10

Find the square root by prime factorisation method 6860.

Mathematics
2 answers:
dimulka [17.4K]3 years ago
7 0
  • Answer:

<em>14√35</em>

  • Step-by-step explanation:

<em>√6860 =</em>

<em>= √686×10</em>

<em>= √686×2×5</em>

<em>= √343×2×2×5</em>

<em>= √49×7×2²×5</em>

<em>= √7²×7×2²×5</em>

<em>= 7×2√7×5</em>

<em>= 14√35</em>

wariber [46]3 years ago
7 0

\sqrt{6860}=\sqrt{10*686}=\sqrt{10*343*2}=\sqrt{5*2*343*2}=\sqrt{5*2*7*49*2}=\sqrt{5*2*7*7*7*2}=\sqrt{2*2*7*7*5*7}    =2*7\sqrt{5*7} =14\sqrt{35}

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ruslelena [56]
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Area of the quarter circle = pi 9^2 / 4
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Area of the triangle
Area pf the triangle = 1/2 b*h
b = h = r
r = 9
Area of the triangle = 1/2 9 * 9 
Area of teh triangle = 1/2 81
Area of the triangle = 40.5

Area of the shaded area
The shaded area = Area of the 1/4 circle - area of the triangle
The shaded area = (20.24 pi - 40.5)ft^2

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6 0
2 years ago
The sweater is on sale for 20% off the regular price the sale price is $60 what is the regular price of the sweater
dedylja [7]
Hello! So the sweater was marked off by 20% and the sale price is $60. To find the original price of the sweater, we can write and solve a proportion. Set it up like this:

60/x = 80/100

This is because 60 is a part of the whole (the original price), and even though the price was marked down by 20%, you still pay 80% of that price. Let's cross multiply the values. 60 * 100 is 6,000. 80 * x is 80x. That makes 6,000 = 80x. Now, divide each side by 80 to isolate the x. 80x/80 cancels out. 6,000/80 is 75. Let's check this. 75 * 80% (0.8) is 60. There. x = 75. The regular price of the sweater is $75.
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2 years ago
Which of these equations shows a proportional relationship?
andre [41]

Answer:

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3 years ago
How many 8 1/4 inch pieces of yarn can be cut from a roll that has 96 inches of yarn
Arada [10]

Answer:

Approximately 12 pieces of yarn can be cut from the 96 inches roll of yarn

Step-by-step explanation:

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Now, solving the mixed fraction 8\frac{1}{4} , we get

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