Debbie is borrowing 3 books from her friend who has a collection of 45 books. Which of the following expressions represents the
2 answers:
Answer: b.C(45, 3)
Step-by-step explanation:
Given: Debbie is borrowing 3 books from her friend who has a collection of 45 books.
Therefore, the number of ways Debbie can choose a group of 3 books will be equal to the number of combinations of selecting 3 books from 45 books.
i.e. The number of ways Debbie can choose a group of 3 books=
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Answer:
d) 24.2 cm²
<em>Area of equilateral triangle A = 24.22 cm²</em>
Step-by-step explanation:
<u><em>Step(i)</em></u>:-
<em> Perimeter of equilateral triangle = 3 a</em>
Given Perimeter of equilateral triangle = 22.45 cm
now 3 a = 22.45
Dividing '3' on both sides,we get
a = 7.48 cm
<u><em>Step(ii):</em></u>-
<em>Area of equilateral triangle</em>
<em> </em><em></em>
<em> </em><em></em>
<em> A = 24.22 cm²</em>
<u><em>Conclusion</em></u><em>:-</em>
<em>Area of equilateral triangle A = 24.22 cm²</em>