<h3>
Answer: 33/5</h3>
===============================================
Explanation:
Start at 6 and count the small tickmarks to see that it takes 5 spaces to go from 6 to 7 on the number line.
So each small tickmark represents 1/5 of a unit.
The arrow is 3 ticks away from the 6, so we add on 3/5 to 6 getting the mixed number 6 + 3/5 = 6 & 3/5
The 6 is the whole part, while 3/5 is the fractional part.
----------------
Let's convert to an improper fraction
6 & 3/5 = 6 + 3/5
6 & 3/5 = 6*(5/5) + 3/5
6 & 3/5 = 30/5 + 3/5
6 & 3/5 = (30+3)/5
6 & 3/5 = 33/5
----------------
You could also use the formula
a & b/c = (a*c + b)/c
to get
6 & 3/5 = (6*5 + 3)/5
6 & 3/5 = 33/5
Firstly, subtract a^2 on both sides:
Next, we are going to be using the difference of squares, which is . Use this on the right side of the equation:
Lastly, square root both sides of the equation, and <u>your answer will be </u>
20 and 50 are the two numbers
20 x 2 = 40
40 + 10 = 50
ANSWER:
Using Snell's law, we can use n1Sinα=n2Sin β where α = Incidence angle, and β=angle of refraction. n1 and n2 are the indices of refraction for water and air.
Sinα=n2/n1 Sinβ For the refracted ray to be along the surface of water, β=90° and therefore Sinβ = 1
So, Sinα=n2/n1= 1/1.33 = 0.7519 => α=sin^-1 (0.7519) = 48.75°.