C: 60 children because 60 cannont go into 9 which is the amount of children in the first ratio
Answer:

Step-by-step explanation:
Given




See attachment
Required
Determine the density of the wood
First, we calculate the volume of the wood.

Substitute values for Length, Width and Height


The density is:


<em> --- approximated</em>
H(t)=-16t²+160
0=-16t²+160
16t²=160
t²=10
t=√10 or 3.16 seconds
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Answer: Complex
Step-by-step explanation: