13. There are about $$ 4 \cdot 10^{5} $$ known species of beetles. The number of known species of caddis flies is abo $$ 10^{4} $$. How many times more species of beetles are there than caddis flies?

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There are approximately 40 times more species of beetles than caddis flies. To find out how many times more species of beetles there are than caddis flies, we can divide the number of beetle species by the number of caddis fly species. The number of known species of beetles is approximately $$ 4 \cdot 10^{5} $$ and the number of known species of caddis flies is approximately $$ 10^{4} $$. Now, we can perform the division: $$ \text{Number of times more beetles than caddis flies} = \frac{4 \cdot 10^{5}}{10^{4}} $$ To simplify this, we can divide the coefficients and subtract the exponents of 10: $$ = 4 \cdot \frac{10^{5}}{10^{4}} = 4 \cdot 10^{5-4} = 4 \cdot 10^{1} = 4 \cdot 10 = 40 $$ Thus, there are approximately **40 times more species of beetles than caddis flies**.

13. There are about \( 4 \cdot 10^{5} \) known species of beetles. The number of known species of caddis flies is abo \( 10^{4} \). How many times more species of beetles are there than caddis flies?

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13. There are about \( 4 \cdot 10^{5} \) known species of beetles. The number of known species of caddis flies is abo \( 10^{4} \). How many times more species of beetles are there than caddis flies?

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