What does it mean when f(x) is equal to multiple equations

What scale factor was applied to the first rectangle to get the resulting image interior answer as a decimal in the box

How many grams the dog will eat in 3 days?

The half-life of a certain material is 0.004 second. approximately how much of a 20-gram sample will be left after 0.016 second? a. 5 grams b. 16 grams c. 0.32 gram d. 1.25 grams