Final answer:
To find out how many geckos you will have after 90 days, you can use the formula: Number of geckos after 90 days = (Initial number of geckos) + (Number of babies per month x Number of months). After plugging in the values, the result is 11 geckos.
Step-by-step explanation:
To find out how many geckos you will have after 90 days, we can use the formula:
Number of geckos after 90 days = (Initial number of geckos) + (Number of babies per month x Number of months)
In this case, the initial number of geckos is 2, the number of babies per month is 3, and the number of months is 90 divided by 30, which equals 3 months. Plugging in these values, we get:
Number of geckos after 90 days = 2 + (3 x 3) = 2 + 9 = 11 geckos
Therefore, after 90 days, you will have 11 geckos if you started with 2.