Answer:
Richard got $30
Step-by-step explanation:
To find how much money Richard got, use cross multiplication:
5x = 150
x = 30
Richard got $30.
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Below are the answers:
a. <span>An = Ao • 2^(t/30)
b. </span>An = 1500 • 2^(60*2/30) <span>or An = 24000
</span>c. <span>4000 = 1500 • 2^(t/30)
</span>or 4000/1500 = 2^(t/30)
<span>or ln(40/15) = (t/30) ln(2) </span>
<span>or t = 30* ln(8/3) / ln(2) </span>
<span>or t ~ 42.45 min</span>
0.0725 is the answer
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