Answer:
a
Step-by-step explanation:
since 90 degrees is 1/4 of a circle, the area of the sector is 5²pi/4 = 25/4pi = 19.63
You would round 1.049 to 1.05.
Answer:

Step-by-step explanation:
x=140°
m || n
Answer:
7 ÷ 4
Step-by-step explanation:
Another example would be:
12/3 = 12 ÷ 3
The number at the front will be the numerator while the second number will be the denominator
Answer:320
Step-by-step explanation:
2/5 of the students surveyed lisen to country. So to make the percentage fit the total student population, you figure out what your 2/5 is in a percetnage. That comes out to 40%. so, 40% of 800 is 320.