Answer:
170°
Step-by-step explanation:
Let a be the distance from Los Angeles to Chicago = 1744 miles, b be the distance from Chicago to New York = 714 miles and c be the distance from New York to Los Angeles = 2451 miles.
A is the angle opposite to side a, B is the angle opposite to side b and C is the angle opposite to side c.
Therefore the angle at Chicago is C.
From cosine rule:
c² = a² + b² - 2ab × cos (C)
2ab × cos (C) = a² + b² - c²
cos (C) = (a² + b² - c²) / 2ab
Substituting:
cos (C) = (1744² + 714² - 2451²) / 2×1744×741
cos (C) = -0.986
C = cos⁻¹ (- 0.986) = 170°
1 43/53 is the answer in a mixed fraction.
The shape has 9 sides.
Sum of interior angles = (n-2) x 180, where n is the number of sides.
Sum of interior angles = (9-2) x 180 = 7 x 180 = 1,260 degrees.
Answer:
<h2>60 days</h2>
Step-by-step explanation:
<h3>Step 1: First, since it is 1/6 pound twice a day, multiply by 2</h3>
1/6 x 2 = 1/3
<h3>Step 2: Divide 20 by 3 to get days that bag will feed the dog</h3>
20 ÷ 1/3 = 60
The bag will feed Nina's dog for 60 days.
I'm always happy to help :)
