If a random sample of 20 persons weighed 3,460, the sample mean x-bar would be 3460/20 = 173 pounds.
The z-score for 173 pounds is given by:

Referring to a standard normal distribution table, and using z = 0.66, we find:

Therefore

The answer is: 0.2546
Answer:
Step-by-step explanation:
If the ratio of dogs to cats is 49:28, as an actual ratio (fraction), this is

We can reduce that to make the numbers smaller without changing the ratio. reducing gives us

We will use that ratio now to set up a proportion that involves a given number of cats and an unknown number of dogs. Keeping dogs on top and cats on bottom,

Cross multiply to get
4x = 140 so
x = 35
According to the ratio of dogs to cats, if there are 20 cats, there will be 35 dogs.
B. 2 I believe that’s right
Answer:
Each spend $12.71, Total spend $50.84
Step-by-step explanation:
42.38/4=10.595
10.595(.2)=2.119
10.595+2.119=12.714
round to 12.71 because there are no thousandths in money.
12.71(4)=50.84