You are conducting an experiment to test the density of a new recipe for chocolate cake. You will test the recipe with 3 different baking temperatures (350, 400 and 450) and 3 different baking times (45 minutes, 55 minutes and 60 minutes). How many treatments are there?

The number of treatments is 9.

Given that,

Based on the above information, the calculation is as follows:

Here we used the fundamental counting principle.  

Therefore we can conclude that the number of treatments is 9.

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There are 9 possible treatments .

Step-by-step explanation:

There are 3 different baking temperatures (350, 400 and 450) and 3 different baking times (45 minutes, 55 minutes and 60 minutes).

By Fundamental counting principle,

Number of treatments  = (Number of different baking temperatures) x (Number of different baking  times)

= 3 x 3 = 9

Hence, there are 9 possible treatments .

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)