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Percents can be used to describe how a quantity has changed

If the base of an exponential expression is a fraction, the exponent tells us how many times to write that fraction as a factor

We translate the percent sentence into a percent equation and then find the unknown.

Heavy and light objects fall at the same rate !!

The law of gravity included a symbol for proportionality. In order to use this relationship for solving problems, we must remove the proportionality by ...

We translate the percent sentence into a percent equation and then find the unknown number

The moon is 240,000 miles from earth-center, or 60 times as far as we are from center

Solids differ in many ways, including color, texture, and elasticity. Another important distinguishing property of solids is density

Division with fractions involves working with reciprocals

We translate the words of the problem into a percent equation and solve it.