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Aleonysh [2.5K]
2 years ago
10

Brass is made up of copper and zinc. 100 grams of brass contains 20 grams of zinc.

Mathematics
1 answer:
Nana76 [90]2 years ago
5 0

Answer:

A.  12 grams Zn

B.  280 g of copper.

Step-by-step explanation:

100 grams of brass

20 grams of zinc

100 grams of brass has 20 grams of Zn.

20/100 = 0.200  Zn   <u>20% Zn  and 80% copper</u>.

A.  (60 g brass)*(0.2) = 12 grams Zn

B.  (350 g brass)*(0.80) = 280 g of copper.

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Step-by-step explanation:

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2 years ago
From a boat ont he lake, the angle of elevation to the top of a cliff is 11° 50'. If the base of the cliff is 1568 feet from the
Marizza181 [45]

Answer:

328 feet

Step-by-step explanation:

From a boat ont he lake, the angle of elevation to the top of a cliff is 11° 50'. If the base of the cliff is 1568 feet from the boat, how high is the cliff (to the nearest foot)

Step 1

Note that

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60 minutes = 1 degree,

thus 50 minutes = x degree

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Step 2

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Cross Multiply

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