Answer:
1.5
Step-by-step explanation:
Anything divided by 1 is itself
85700
8570
85.7
8.57
0.857
Each time, you divide by 10 (move the decimal place 1 place value to the left).
Answer:
C) π/6
Step-by-step explanation:
The area under the curve from x=-π/2 to x=k is 3 times the area under the curve from x=k to x=π/2.

Graph: desmos.com/calculator/mezlen9hb4
The pentagon is the one with 5 sides. Good Luck!