Answer: The cost for 20 people equals $180.
Step-by-step explanation:
Given: It costs $100 to rent the bowling alley, plus $4 per person.
The cost for any number (n) of people can be found using the expression
We can find the cost for 20 people by substituting n=20 in the above expression, we get
Hence, The cost for 20 people equals $180.
Answer:
Mrs Mamie will arrive at her destination on time !
Step-by-step explanation:
Mrs Mamie drives 130miles in 2 hours that means 65 miles/h
During 7 hours she travels 65*7=455 miles that definetely is more than 390 miles as necessary.
SO YES, Mrs Mamie will arrive at her destination on time !
The
formula for the population proportion is:
n = p ± Zc
where p =
confidence level = 0.2
n =
proportion = 0.22
= standard error = 0.01
Finding for Zc:
.20+(.01)=.22
Zc = 2
Referring to Critical value table for standard
normal curve, a Zc value of 2 is equivalent to 95% Confidence Level.
Answer: 95% Confidence Level