If a light ray hits a plane mirror at 20°. What is the angle of reflection?

This question is vague because it doesn't specify whether 20° is the angle of incidence or the angle the ray makes with the surface

But If we consider 20° as the angle of Incidence...

The Angle of Reflection = 20° also

Because

From The Law of Reflection

Angle of Incidence = Angle of Reflection

Explanation:

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles

i dont have a visual in front of me, but i can you reason to try to get the right one. the graph should look like this, 0 to 6 there is a spike, 12 to 14 there should be a very low point. slight increase in the graph at 12 to 14, and flat 14 to 18

explanation: