Step-by-step explanation:
Fractions equivalent to 1/4 are 2/8, 3/12, 4/16, 5/20, ...
Look at the rectangle. The bottom side measures 8 miles, so the top side also measures 8 miles.
Now look at the upper right triangle. For the angle of 32 deg, the top side of the triangle is the adjacent leg of the triangle. The air distance, marked x, is the hypotenuse of the triangle.
The trig ratio that relates the adjacent leg and the hypotenuse is the cosine.
WY = a = 4
ZY = b = 3
As WYZ is forming a right angle triangle, therefore, we can use pythagorean theorem to find the value of c
a2+b2=c2 (4)2+(3)2=C2 16+9=C2 C2=25
Taking square root on both sides
√c2= √25 c=5
The value of c is 5 units.
The factor of intensity increase for each whole number increase in the Richter scale is 10. This is because the Richter scale is a logarithmic scale that has a base of 10. As an example, a Richter scale of 1 increased to 2 will have an intensity increase of
10^2 / 10^1 = 10
I think it is 6.9, hop it helps