Please Help! Suppose that the amount of algae in a pond doubles every 6 hours. If the pond initially contains 50 pounds of algae, how much algae will be in the pond after 18 hours?
A. 400
B. 10,800
C. 300
D. 600
I think it's A: 400
So we start out at 50 and double every 6 hours till 18 hours
1st 6th hour: 100
2nd 6th hours(12 hours): 200
3rd 6th hours(18 hours):400
So at 18 hours there would be 400 pounds of algae

to find the unit price, we must figure out the cost of one item (in this case one dish towel).   to do this, we divide the total price ($7.92) by the number of items bought (for this problem it is 8, because there are eight dish towels in one pack).  

$7.92/8 = $0.99

therefore, the unit price, or the price of one dish towel, is $0.99.

hope this !

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1/3 + 1/5 = 8/15.

step-by-step explanation:

hope it