Answer:
The absolute value of a number is always positive.
if x > 0 , then = x
if x < 0 , then |-x| = x
Use the absolute value.
To find an expression for: An elevation of 250 feet.
Elevation mean the height of a place above the sea level.
An elevation of 250 feet = +250
then, using absolute value:
Size of each amount,
Step-by-step explanation:
Given: r = 4 cm
The surface area A of a sphere is given by
Answer: (0.5496, 0.5754)
Step-by-step explanation:
The confidence interval for population proportion (p) is given by :-
, where
= Sample proportion , n= sample size , z*= Critical z-value.
Let p be the proportion of all college students who are in favor of banning Hawaiian shirt.
Given, A random sample of 4000 college students yielded 2250 who are in favor of banning Hawaiian shirts.
i.e. n=4000
z-value for 90% confidence level is 1.645
Now , 90% confidence interval for p would be :
Hence, the required 90% interval = (0.5496, 0.5754)