Answer:
Option D
Step-by-step explanation:
By applying cosine rule in the given triangle,
a² = b² + c² - 2b.c.cos(m∠A)
By substituting values in the formula,
9² = 10² + c² - 2(10)(c)cos(15)°
81 = 100 + c² - 19.32c
c² - 19.31c + 19 = 0
By quadratic formula,
c = 
= 
= 1.08, 18.27
≈ 1.1, 18.3
Therefore, Option D will be the answer.
Step-by-step explanation:
no.C I think?............
Answer:
<h3>Rational number</h3>
Step-by-step explanation:
A rational number are number that can be written as the ratio of two integers. Integers are whole numbers and they can be positive or negative including zero.
Looking at the value 5.371, we can write it in fraction form as shown;
5.371 = 5371/1000
Since 5.371 is equivalent to 5371/1000 and <em>5371/1000 is a ratio of two integers 5371 and 1000 therefore we can conclude that 5.731 is a rational number</em>
<u>Note that decimal numbers are not integers and are not whole numbers.</u>
