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while working on his science fair project, julian noticed changes in the cultures he was growing. he noticed that the cultures were increasing daily as displayed in the chart.

1-4
2-9
3-16
4-25

if the increase continues at the same rate, how many cultures will be present on the 9th day?

Respuesta :

1 day = 4
2 day = 9-4=added 5
3 day = 16-9 = added 7
4 day = 25-16= added 9
5 day = 25+11 = 36
6 day = 36 +13 =49
7 day = 49+15 = (keeping adding by 2 more each time)
8 day =
9 day = 

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