Answer:
Decimal 1/20= .05
Percent 1/20= 5%
Step-by-step explanation:
You have the right answer. n + p = m because inside angle + inside angle = outside angle.
Answer: the answer is 83 you could of did it on a calculator
Step-by-step explanation:
Set up a proportion. take 3/6 = 20/x
Cross multiply 3 * x = 6 * 20
Simplify 3x = 120
Divide by 3 x = 40
So the denominator of the bottom fraction is 40
Answer:
Step-by-step explanation:
Given that in order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estimating the average time it takes to install tile flooring.
Std deviation =4.5 errors
95% confidence interval = Mean±1.96*std dev
Hence we have

Sample size should be 20.