Answer:
option 4
Step-by-step explanation:
|a| represents Absolute value, it is the distance from zero that a number is on the number line. And we know distance cannot be negative.
So,


Answer:
7
Step-by-step explanation:
The reference angle is
pi/3.
At 180 it would be 9pi/3 so going past that is 10pi/3.
Answer:
28 cm^2
Step-by-step explanation:
a^+21^2=36^2
a^2+441=1225
a=28