7/20 is equal to 0.35 or can also be equal to 35% of the whole.
Answer:

Step-by-step explanation:
There are 99 - 10 + 1 = 90 numbers between 10 and 99
There are 18 numbers that have at least one two digit.

According to the question,
Man needs to drink = 3 liters of water a day = 3000 ml
Women needs to drink = 2.2 liters of water a day = 2200 ml
Mr. Morrison drank = 880 ml
Mrs. Morrison drank = 700 ml
Total water needed to be drink by both men and women = 3000+2200 = 5200 ml
Total water drank by Mr. and Mrs. Morrison = 880+700 = 1580 ml
Water they both need to drink combined to meet the recommended amounts for the day = 5200 - 1580 = 3620ml
= 3.62 liters
Hope this helps!
Answer:
answer b
Step-by-step explanation:
Answer b is definitely the correct one.
The Empirical Rule states that 68% of normally distributed data lies within 1 standard deviation of the mean; 95% within 2 standard deviations, and 99.9% within 3.