Kn + 4f = 9f
kn + 4f - 4f = 9f - 4f
kn = 5f
kn/5 = 5f/5
kn/5 = f.
f = kn/5 or
f = 1/5 (kn).
Answer:
a) To increase 160 by 4% we multiply by 1.04
b) To decrease 160 by 6% we multiply by 0.94
Step-by-step explanation:
a) Here we have to increase 160 by 4% we are to note that;

Therefore, increasing 160 by 4% is to add additional 0.04×160 to 160
That is 160 + 0.04×160 = 160×(1 + 0.04) = 160×1.04
Therefore Sue should have multiplied 160 by 1.04 to increase 160 by 4%.
b) Here to decrease 160 by 6%, we subtract 6% of 160 from 160 that is;
Decrease 160 by 6% = 160 - 160×0.06 = 160×(1 - 0.06) = 160 × 0.94 = 150.4
Hence to decrease 160 by 6% we multiply by 0.94.
Answer: 0.1797
Step-by-step explanation:
Given : 
Let x be the random variable that represents BMI for adults in this country.
We assume that BMI for adults in this country is normally distributed.
Then, z-score for x=25.6 ,
Using z-value table , we have
The probability that the person's BMI is more than 25.6 :

Hence, the probability that the person's BMI is more than 25.6 = 0.1797
Hence, the probability that the person's BMI is more than 25.6 = 0.1796
Hence, the probability of the stick's weight being 2.23 oz or greater = 0.0174
Answer: 30
Step-by-step explanation: