A science competition 25 problmes were given each correct answer earned 4 points and 2 points were deducted for each incorrect a
1 answer:
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That's a Pythagorean Theorem application, and this is the first Pythagorean Triple in the book.
If we don't recognize that
we can do the math:
Answer: 5 blocks
Answer:
18π + 90
Step-by-step explanation:
The perimeter is the sum of quarter of the circumference and 2r , that is
P = 2πr + (45 + 45)
= 2 × π × 36 × + 90
= 2 × π × 9 + 90
= 18π + 90