Answer:
yes
0.125 = 0.125
Step-by-step explanation:
1/2^3 = 0.125
2^-3 = 0.125
do a FOIL on it to get the product, or just use the binomial theorem to expand the binomial and simplify
Answer:
65
Step-by-step explanation:
Hi,
I think you mean red or blue.
Number which are red or blue = 12 + 14
= 26% or 0.26
The number of red and blue = 0.26 * 250
= 65 marbles
Answer:
Amount of B used = 276.6 millimeters
Step-by-step explanation:
A = A millimeters
B = A + 400 millimeters
Hence
Taking an overall balance
(0.16 x A) + (0.2)(A+400) = 476
0.16A + 0.2A + 80 = 476
A = 1100 millimeters
B = 1100 + 400 = 1500 millimeters
Hence using direct proportion
2600 --------------------476
1500 ---------------------X
X = 276.61538
Amount of B used = 276.6 millimeters
Answer:
3.30185
σ 8.7636
Step-by-step explanation:
the fromula for 100(1-α)% confidence (two sided) for σ is
√(η-1)*s^2/x^2_α/2,V σ √(η-1)*s^2/x^2_(1-α/2,V) ∴ (v=n+1)
now data given is n = 12 and s=5.2 mg
for 99% CI ,α=0.05 and (n-1)=9 degree of freedom
from chi- square table x^2_(0.025,9)=19.02 ; x_(0.975,9)=2.7
substitute them in above expression we get
3.30185 σ 8.7636
