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klio [65]
3 years ago
9

What was the original number if after an increase of 40%, it became 420.

Mathematics
2 answers:
Nady [450]3 years ago
8 0

Answer:

300

Step-by-step explanation:

Solve for x.

x+(2/5*x)=420

x=300

Eva8 [605]3 years ago
6 0

Answer:

168

Step-by-step explanation:

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Step-by-step explanation:

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Answer:

C(p)  = 4,96 (in thousands of dollars)

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Step-by-step explanation:

Information we have:

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Cost of production = l * k     (in thousands of dollars)

C(l)  =  l  + 4000/450*l

Taking derivatives (both members of the equation)

C´(l) = 1 - 400 /45*l²          ⇒ C´(l) = 0          ⇒ 1 - 400/45l²  = 0

45*l² -  400  = 0              ⇒  l²  = 400/45

l = 2.98 (in thousands of dollars)

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C(p) = l + k

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