Answer: 18
Step-by-step explanation:
The circumference formula is C= 2
r
r being the radius, so you can just plug in.
C= 2
(9) = 18
Answer:
0,42
that should be the answer
The 90th percentile corresponds to Z ≈ 1.28155.
Answer:
n = 5.75
Step-by-step explanation:
original equation
n - 31/4 = 2
multiply everything by 4
n * 4 - 31/4 * 4 = 2 * 4
simplify
4n - 31 = 8
add 31 to both sides
4n - 31 + 31 = 8 + -31
simplify
4n = -23
divide both sides by 4
4n/4 = -23/4
simplify
n = 5.75