D. The boat was too far away for the Coast Guard to reach the child.
Answer:
Practice and determination.
<span>In order to vary the sentence structure, the sentence I would insert in the blank is C. Have you noticed how hard she works? The reason for this is because inserting an interrogative sentence that has a completely different structure and word order than the other two sentences works great in order to introduce some versatility into a paragraph consisting of a couple of sentences. Here, the only sentence that differs is C. which is why you should choose it. Starting three sentences in a row with the same word can be a bit dull and repetitive. </span>
Circumference= 2*pi*r=24pi
then pi*r=12pi
the r=12
area =pi*r^2=(12)^2*pi=144 pi cm^2
