20 is the answer to the question you asked.
Answer:
5*10^1
Step-by-step explanation:
Answer: Second option is correct.
Step-by-step explanation:
A company wants to try out two new toothpaste brands (brand A and brand B) on customers who use the company's existing toothpaste brand.
So, the best method for this study is an experiment.
As the company will try its two new brands who are already using their existing toothpaste brand.
They will get to know their like and dislike about their two new toothpaste brands.
Hence, Second option is correct.
Answer:
1. 48 seconds or 0.8 minutes per lap.
2. 1,008 seconds or 16.8 minutes to run 21 laps.
Step-by-step explanation:
1. Turn 4 minutes into seconds which is 240 then divide it by 5 and you'll get 48 seconds per lap. 48/60 to turn it into minutes = 0.8 minutes
2. use 48 seconds and times it by 21 which gets you 1,008 seconds, then divide that by 60 which gets you 16.8 minutes to run 21 laps.
