Select whether the scale reduces, enlarges, or preserves the size of an actual object. 1 m to 21 cm

answer is:

1.75 pounds

the answer is 99.

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: