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:
and 
Step-by-step explanation:
Let
x -----> the number of polyphonic ringtones
y ----> the number of standard ringtones
we know that
-----> equation A
-----> equation B
Solve the system of equations by substitution
Substitute equation A in equation B and solve for y





Find the value of x
Answer:
Step-by-step explanation:
what fraction?? she uses 1/6 of the construction paper
if you are referring to how much paper is left, its 2/6 aka 1/3
Answer:
90°
Step-by-step explanation:
right angle - 90°
.....
Answer:

Step-by-step explanation: