Math is used in a hourglass to make sure you have the proper flow rate for the desired amount of time. If the sand flows too fast then you need to make a smaller opening, if to slow you need too make a wider opening or add more sand.
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They Are Both Used For Counting Time.
math is used to show people the different ways math can be used such as fractions or decimals you name it
Hourglass.
yes they are used in many ways in math
Letters used in math are called variables.