(54/100)*x = 81 => x = 8100/54=> x = 150;
Answer:
d. 313.33
Step-by-step explanation:
please rank brainliest if possible:)
Unsure of what you mean by "reference number."
I do recognize that 11pi/9 is in quadrant III. I suspect that the so-called "reference number" is the acute angle between the end ray of 11pi/9 and pi, or, in more easily comparable numbers, between 9pi/9 and 11pi/9.
That difference is 2pi/9.