Answer:
n = 484
Step-by-step explanation:
If Confidence Interval CI = 95 % then α = 5% and α/2 = 2,5 %
α/2 = 0,0125
MOE for normal distribution is:
MOE = z * σ/√n
For α/2 = 0,0125 ⇒ z(score) = -2,2
MOE = |-2,2| * 4/√n
0,4*√n = 8,8
√n = 8,8 / 0,4
√n = 22
n = 484
B: 4.75+0.75n ≥25
Because she has already spent 4.75 and she only has $25 and she cannot spend more than$25
Answer:
D!!!!
Step-by-step explanation:
To find the percent mark up, find the amount of the mark up first:
From $
21
, 450 → $
27
,
950 is an increase of $
6
,
500 To find the percent mark up:change original amount ×
100 %
6500 21450 × 100
% = 30.3
% mark up in price.
Answer choice B, G(x) = (x-2)^3
