The square root of 81 equals 9. This can be known through understanding the roots of perfect squares. After this, you multiply 8 x 9 to get a final answer of 72.
Answer:
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48 divisors: 1, 2; 4; 5; 6; 8; 12; 16; 24; 48;
Answer:
= 18
Step-by-step explanation:
= 
Cross multiply
5 * c = 30 * 3
5c = 90
Divide both sides by 5
c = 90/5
c = 18