1. ## exponential equation

I need an answer very soon...

(36^x)-(39*6^x)=-350

2. Let $\displaystyle y=6^x$ then $\displaystyle 36^x = y^2$ substitute that und solve.

3. I still can't get it to work, what would be the answer?

The following table shows the results of Jennifer's science experiment. x represents the number of hours into the experiment and y represents the average amount of algae present in a sample taken from her fish tank (in number of cells per slide).

x 0 28 45 73 100 115 131 151
y 4.67 5.33 6 6.33 10 10 10.33 12.33

Use the Modeling Applet to find the best exponential model representing the amount of algae in the fish tank over time. (The coefficient and base should be rounded to 5 decimal places.) Use this model to predict the average amount of algae present in a sample after 137 hours. (Round your answer to 2 decimal places.)

Its either a ln function or a power function but I can't figure out which one or how to find the formula.

6. Originally Posted by ryandman89

The following table shows the results of Jennifer's science experiment. x represents the number of hours into the experiment and y represents the average amount of algae present in a sample taken from her fish tank (in number of cells per slide).

x 0 28 45 73 100 115 131 151
y 4.67 5.33 6 6.33 10 10 10.33 12.33

Use the Modeling Applet to find the best exponential model representing the amount of algae in the fish tank over time. (The coefficient and base should be rounded to 5 decimal places.) Use this model to predict the average amount of algae present in a sample after 137 hours. (Round your answer to 2 decimal places.)

Its either a ln function or a power function but I can't figure out which one or how to find the formula.