Answer:
it'll take 251,991 tons of ore to obtain 126 tons of gold.. That's a lot
147 =20x+47
147 is less than or equal to 20 multiplied by the number of hours she works (x) plus 47 the amount of money she already has
A. This is true. If 0 < r < 1, then we have decay. For example, if r = 0.5 then we cut each term in half to get successive new terms (10, 5, 2.5, 1.25, etc etc)
B. False. Common differences apply to arithmetic sequences which are not exponential in nature.
C. False. Decay curves slope downward. As you read them from left to right, they will drop down.
D. False. If r > 1, then we have exponential growth. It is effectively the opposite of choice A.
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So in summary, the final answer is choice A
