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lapo4ka [179]
4 years ago
14

Please help. Trig: Laws of Cosines

Mathematics
1 answer:
ladessa [460]4 years ago
8 0

Answer:

16.2 units

Step-by-step explanation:

Greater angle: 180 - 72 = 108

D² = 10² + 10² - 2(10)(10)cos(108)

D² = 261.8033989

D = 16.18033989

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Given :

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Natasha and Rodrigo are in a class of 30 students that selects 4 leaders. How many ways are there to select the 4 leaders so tha
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There are 20853 ways are there to select the 4 leaders so that either Natasha and Rodrigo are both selected or Natasha and Rodrigo are both not selected.

<h3>What is combination?</h3>

A combination is a mathematical technique that determines the number of possible arrangements in a collection of items.  

The number of the possible ways will be calculated by:

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