All of them are true.
A: Rule.
B: There exist such functions f and g that satisfy the equality.
C: According to (A) this is acceptable.
D: Rule.
Hope this helps.
I attached the document with the answers and work with the formulas. Since the formulas and fractions don't work very well with this site (especially the pi symbol, they should fix that).
:)
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For A, you take 70% of 421,000 and subtract that from 421,000. You should solve like this: 421,000 - (0.7 x 421,000).
For B, you take 40% of 31.50 and add it to 31.50. (31.50 + (31.50 x 0.4).
This is all I can give for now. Glad to help you!
Answer:
what?
Step-by-step explanation: