Answer:
22.4 cm
Step-by-step explanation:
2.8 cm x 8 sides = 22.4 cm
Answer:
1. 38, 80, 89 and 4. 14, 15, 29
I don't know if there is supposed to be only one, but both of those do not form right triangles.
Step-by-step explanation:
Evaluate all of them and see if they meet the requirements of the Pythagorean Theorem, a² + b² = c².
1. 38, 80, 89
a² + b² = c²
38² + 80² = 89²
1444 + 6400 = 7921
7844 ≠ 7921.
This is an answer because it doesn't satisfy the Pythagorean Theorem.
2. 16, 63, 65
a² + b² = c²
16² + 63² = 65²
256 + 3969 = 4225
4225 = 4225
This isn't the answer because it satisfies the Pythagorean Theorem.
3. 36, 77, 85
a² + b² = c²
36² + 77² = 85²
1296 + 5929 = 7225
7225 = 7225
This isn't the answer because it satisfies the Pythagorean Theorem.
4. 14, 15, 29
a² + b² = c²
14² + 15² = 29²
196 + 225 = 841
421 ≠ 841
This is an answer because it does not satisfy the Pythagorean Theorem.
<u><em>Answer:</em></u>
5%
<u><em>Explanation:</em></u>
% she earned in interest can be calculated by calculating the % of increase in the balance
<u>We have:</u>
Original balance = $12,450
Amount of interest = $622.5
<u>This means that:</u>
new balance = 12,450 + 622.5 = $13,072.5
<u>Now, we can get the percentage of increase:</u>
% of increase = 
<u>Substitute with the values we have to get the percentage of interest earned as follows:</u>
% of interest earned = 
= 5%
Hope this helps :)
