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melisa1 [442]
3 years ago
13

Please help I’m having trouble with this question!

Mathematics
1 answer:
mezya [45]3 years ago
4 0

ok thanks for letting me know you need help

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You planned on making 5000 cookies
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laura bought a square canvas to paint a picture of her cat. one side measures 22 centimeters. what is the area of canvas.
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If we know that Laura's canvas is square, and one side is 22cm,

area of a square is l*w, with a special case of l=w

 the area will be
A= l*w=22*22=484cm^2

also, Asquare is=l^2
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Fill in the blank. Given O below, you can conclude that OD is congruent to ___________.
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The circle with center O has two chords AC and EF which are of same length 9.07.

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OD is congruent to OB.

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In the video, the water level was 15 milliliters before adding the chain, and 20 milliliters after adding the chain. When I weig
mr_godi [17]

Answer:

  • 39.7%

Explanation:

<u />

<u>1. First find the density of your chain</u>

  • Density = mass / volume

  • Volume = displaced water volume

                      = Volume of Final level of water - initial level of water

                     = 20 ml - 15 ml = 5 ml

  • Mass = 66.7 g

  • Density = 66.7g / 5 ml = 13.34 g/ml

<u />

<u>2. Second, write the denisty of the chain as the weighted average of the densities of the other metals:</u>

Mass of gold × density of gold + mass of other metals × density of other metals, all divided by the mass of the chain.

Calling x the amount of gold, then the amount of other metals is 66.7 - x:

        \dfrac{19.3\cdot x+9.7\cdot (66.7-x)}{66.7}=13.34

       19.3x+635.66-9.7x=889.778

      9.6x=254.118\\\\x=26.47

Then, there are 26.47 grams of gold in 66.7 grams of chain, which yields a percentage of:

  • (26.47 / 66.7) × 100 = 39.7%
7 0
3 years ago
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