Answer:
River C is: 2,965 miles long.
River D is: 2,565 miles long.
Step-by-step explanation:
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The main rules that we use here are :
i)
for nonnegative values a and b.
ii)
.
Thus, first 'decompose' the numbers in the radicals into prime factors:
.
By rule (i) we write:
.
We can collect these terms as follows:
, and by rule (ii) we have:
Answer:
.
i)
ii)
Thus, first 'decompose' the numbers in the radicals into prime factors:
By rule (i) we write:
We can collect these terms as follows:
Answer: