The analysis of ac circuits uses a rotating vector called a

Phasor

Explanation:

A phasor is usually referred to as a rotating vector which has scaled lines. A vector quantity is one which has both magnitude and direction.

Since a phasor is also a vector quantity it has the magnitude and direction in the form of quantity and displacement. The quantity and displacement are usually measured in a counterclockwise direction.

Phasors is used in the engineering world to establish relationships between AC quantities and the parameters such as current and voltage etc.

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