26.2/210= .125 miles per minute
210/26.2= 8.02 minutes per mile
Step-by-step explanation:
It is the bottom right corner choice
Say she chooses topic A. She needs at least one book to arrive on time. The probability that no books arrive on time is 0.1 x 0.1 = 0.01 so the probability that at least one book arrives on time is 1 - 0.01 = 0.99.
Say she chooses topic B. She needs at least two books to arrive on time. The probability of no books arriving on time is 0.1 x 0.1 x 0.1 x 0.1 = 0.0001. The probability of exactly one book arriving on time is 4 x 0.1 x 0.1 x 0.1 x 0.9 = 0.0036 (binomial probability distribution formula - the 4 comes from 4C1). So the probability of her not getting enough books is 0.0001 + 0.0036 = 0.0037 and the probability she does get the books she needs on time is 1 - 0.0037 = 0.9963.
So she should choose topic B.
Answer:
The answer to your question is 1 5/7 or 1.7 hours ≈ 1:43 min
Step-by-step explanation:
Data
Bob lasts 3 hours
Fred lasts 4 hours
Together = ?
Process
1.- Determine what they do in 1 hour
Bob = 1/3 in x hours x/3
Fred = 1/4 in x hours x/4
2.- Write the equation to this problem
x/3 + x/4 = 1
3.- Solve it for x
(4x + 3x)/12 = 1
7x = 12
x = 12/7
x = 1 5/7 or 1.7 hours ≈ 1:43 min