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The original formula for the volume of a cone is
O.K. You give the approximate value of pi in the formula.
We have:
Substitute:
Answer: 7 cm.
The question is an illustration of proportion and exponents
The number of dvd is one crate is:
From the question, the given parameters are:
<em /><em> ---- 5 dvds in 1 package</em>
<em /><em> --- 5 packages in 1 box</em>
<em /><em> --- 5 boxes in 1 crate</em>
<em />
The number of dvds in 1 crate is calculated as follows:
Substitute 5 packages for 1 box in the above equation
Substitute 5 dvds for 1 package in the above equation
Apply law of indices
Express properly as:
Rewrite as:
Hence, the number of dvd is one crate is:
Read more about proportion and exponents