Answer:
π/8
Step-by-step explanation:
∫₂°° dx / (4 + x²)
If x = 2 tan u, then dx = 2 sec²u du.
When u = π/4, x = 2. As u approaches π/2, x approaches ∞.
∫ (2 sec²u du) / (4 + 4 tan²u)
½ ∫ (sec²u du) / (1 + tan²u)
½ ∫ (sec²u du) / sec²u
½ ∫ du
½ (π/2 − π/4)
π/8
A 107 I'm pretty sure or b 710
Answer:
each side of the square is 25cm
Step-by-step explanation:
this is because of two things:
1. a square has equal sides
2. the perimeter is all the sides added together.
so if you call the length of one side x, you can make this equation:
x + x + x + x = 100
<em>combine like terms</em>
4x = 100
<em>divide both sides by 4</em>
x = 100/4
x = 25
Answer:
Graph B
Step-by-step explanation:
Step 1) y+2≤-2/3x+4
Subtract 2 from both sides to get y≤-2/3x+2
Step 2) We know the line will be solid because of a "≤" sign. Use (0,0) to determine which side will be shaded.
0≤0+2 is true so the side that includes the origin should be shaded.
Answer:
the tenths and the thousands
