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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>
Average speed = total distance/ time taken
= 200/5 = 40 miles per hour.
Just round it if the number in the ones place is 5 or under round it to the nearest tenth
7.) 10%
8.) 50%
9.)100%
10.)90%
11.)10%
12.)50%
10 because when you put c minus 10 is 10 since theres nothing there
I am going to assume you meant 4 and one half hours. So you want to divide the distance by time. So 288 divided by 4.5 hours is 64. So Miley's average speed is 64 miles per hour.