2006-12-10 10:06:03 · 12 answers · asked by abigail<3 1 in Science & Mathematics ➔ Mathematics
Total = Beginning * 2^(time/rate of doubling) = 100 * 2^(20/4)
= 3.2 kg = 3200 g
2006-12-10 10:08:15 · answer #1 · answered by feanor 7 · 0⤊ 0⤋
100 x 2 = 200 4days
200 x 2 = 400 8days
400 x 2 = 800 12days
800 x 2 =1600 16days
1600 x 2 = 3200 20days
Therefore at 20 days its is 3200 grams
2006-12-10 18:10:03 · answer #2 · answered by gordon_benbow 4 · 0⤊ 0⤋
if it doubles every 4 it will double 5 times so 100 becomes 200 then 400 then 800 and then 1600 and finally on the 20th day 3200 grams
2006-12-10 18:09:51 · answer #3 · answered by Anonymous · 0⤊ 0⤋
It's a simple plug-in algebra 2 problem. Do you remember the equation, y = intial amount * 2 ^ (rt). The exponential is 2 because it doubles. You know the values know so plug them in. The r = rate of change so if it doubles every 4 days r = 1/4. T = 20 days. Now that you know this the equation looks like this: y = 100 * 2 ^ (20/4). And if you solve this you shoudl get 3200.
2006-12-10 18:11:16 · answer #4 · answered by hmm123 2 · 0⤊ 0⤋
Gold is an element, it does not double every four days, if you have 100 grams today in 20 days you will have 100 grams of it.
2006-12-10 18:09:19 · answer #5 · answered by peepaul 1 · 0⤊ 1⤋
200 after 4 days
400 after 8 days
800 after 12 days
1600 after 16 days
3200 after 20 days
Answer is 3200 grams.
2006-12-10 18:08:17 · answer #6 · answered by chris_in_columbia 2 · 0⤊ 0⤋
well 20/4 is 5 so that means it doubles 5 times.
100*(2^5)=3200 grams or 3.2 kilograms
2006-12-10 18:08:04 · answer #7 · answered by grigri9 2 · 0⤊ 0⤋
100x2x2x2x2x2 = 3200 grams
2006-12-10 18:08:27 · answer #8 · answered by mr_cheesedanish 1 · 0⤊ 0⤋
Days Grams
-------|------------
4---------200
8---------400
12--------800
16--------1600
20--------3200
So after 20 days, 3200 grams would be present.
2006-12-10 18:08:22 · answer #9 · answered by radioflyer 5 · 0⤊ 0⤋
3200 grams
2006-12-10 18:08:35 · answer #10 · answered by Anonymous · 0⤊ 0⤋