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lisov135 [29]
3 years ago
6

A metal alloy is 25% copper. Another metal alloy is 50% copper. How many grams of the 50% copper alloy should be used to make 10

00 grams of a metal alloy that is 45% copper?
Mathematics
1 answer:
Elis [28]3 years ago
5 0
Well if the alloy makes the 1000 grams, but you are dealing with copper that isn't even 100% copper, than you either need 55% more copper, which isn't given, which means you really need 550 grams of alloy copper.
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Step-by-step explanation:

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The lenght of the catenary is given by the following formula (which can be proved easily):

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You have to solve the system of two equations, (1) and (2), with two unknowns (a,d). It's fairly straightforward.

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My calculation:

a=353≈11.67

d=703arccosh257≈45.40

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