Each month Manuel reads 6 novels so you get

If you plug in 13 for m we get

Manuel needs to read 78 novels in 13 months.
Answer:
14.04°
Step-by-step explanation:
In this right triangle, we're seeking the measurement of an angle at the base of the triangle and we have the measurements of two of the sides (none are the hypotenuse) : the opposite one of the angle and the adjacent side.
The relationship between the two sides we have the measurement and the angle we are looking for is the tangent:

To find the angle we do an arctan on 0.25 and we get an angle of 14.04 degrees.
This is eazy 630=90x
divide 90 on both sides
7=x
x=in
7feet=1in