Answer:
the duplicate ratio of a : b
= a²/b²
Step-by-step explanation:
for example:-
for understanding
if u wanna find the duplicate ratio of 4:5
so,
4²/5²= 16/25
•°• 16:25
16:25 is your duplicate ratio of 4:5
Answer: for the multiple choice question, its the first one. Then for number of friends it goes, 5,10,15,20 and the cost goes 100,200,300,400. hope this helped!!! xoxo
Answer:
.36 miles in one hour. sorry if I'm wrong.
The 99% confidence interval for the difference between the average years of service between men and women would be = 3.43.
<h3>What is confidence intervals?</h3>
Confidence interval is defined as the statistical parameter that is used to know if a set of values would fall within a certain range of population or not.
Using the statistical table, the value of 99% or 0.99 confidence interval has a z-score = 2.576
The standard error that exists between the bothe value = SD/Ö
Where SD = difference between the standard deviations = 8.39 - 4.39 = 4
Where ñ = different between the average years of service = 9.62
Standard error= 4/√9.62 = 4/3.01 = 1.33
The confidence interval = 2.576 × 1.33 = 3.43.
Learn more about confidence interval here:
brainly.com/question/26658887
#SPJ1
<h3>
Answer: 1 hour</h3>
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Explanation:
In the method I show below, the value 600,000 liters is never used. All that matters are the two values of 100 minutes and 150 minutes.
Pipe A drains the pool in 100 minutes. The rate it drains the pool is 1/100 of a pool per minute. If you multiply 1/100 by 100, then you'll represent 1 full job being done (that job being draining the pool).
Pipe B drains the pool in 150 minutes. Pipe B's rate is 1/150 of a job per minute.
In total, the combined rate is
1/100 + 1/150 = 3/300 + 2/300 = 5/300 = 1/60 of a pool per minute
This means it takes them 60 minutes to drain the pool assuming the two pipes work the most efficiently together (ie one pipe doesn't hinder the other). Since 60 minutes = 1 hour, it's much easier to say it takes 1 hour to drain the pool with both pipes working together.
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We can get this same answer through solving the equation
1/x + 1/y = 1/z
for z. Use x = 100 and y = 150.
