How many days does a scientist grow a culture of 3000 cells at 7% growth per day to increase the number of cells by 630?
2 days
3 days
8 days
10 days
The Correct Answer is B
To find out how many days it takes for a culture of 3000 cells growing at a rate of 7% per day to increase by 630 cells, follow these steps:
Determine the daily growth:
Daily growth rate=7%=0.07
Calculate the daily increase in cells:
Daily increase=3000×0.07=210 cells per day
Determine the total increase needed:
Total increase needed=630 cells
Calculate the number of days needed:
Number of days = 
Number of days = 
= 3 days
Therefore, the correct answer is: 3 days
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
To find what percent the ratio of 4 to 9 represents, follow these steps:
Convert the ratio 4/9 to a decimal:
4/9 ≈ 0.4444
Convert the decimal to a percentage by multiplying by 100:
0.4444 × 100 = 44.44%
Rounding this to one decimal place gives us:
44.4%
Correct Answer is A
Explanation
To determine how many ounces are in 5 
pounds, follow these steps:
Understand the given conversion:
of a pound is 4 ounces.
To find out how many ounces are in 1 pound, multiply by 4: 4ounces×4=16ouncesperpound
Convert 5 
pounds to ounces:
First, convert 5 
to an improper fraction: 5 
= 
= 
Multiply this by the number of ounces per pound: 
× 16 = 
= 88ounces
Therefore, there are:
88 ounces in 5 
pounds.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today