A square picture with a side length of 30 cm is scaled by 60% on a photocopier. The copy is then scaled by 60% again. What is the side length of the picture after it has been successively scaled by 60% 4 times?

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.