Bill spends an average of 5 minutes each day waiting in lines. If Bill is typical of the 290 million people in the United States, which of the following expresses the approximate combined amount of time these people spend annually waiting in line?

A. 1.45 × 109 minutes a year

B. 14.5 × 108 minutes a year

C. 1.825 × 103 minutes a year

D. 0.52925 × 1010 minutes a year

E. 5.2925 × 1011 minutes a year

Skip this question for now.

millli, for your information, scientific notation can be written as

1.45x10^9, or 1.45x10E9.
So the above choices are really:
A. 1.45 × 10^9 minutes a year
B. 14.5 × 10^8 minutes a year
C. 1.825 × 10^3 minutes a year
D. 0.52925 × 10^10 minutes a year
E. 5.2925 × 10^11 minutes a year

The total number of minutes will therefore be
5 min/person/day * 365 days/year *290x10^6 people
I'll let you do the calculator exercise.

idkk

The time it takes a student to walk from the dorm to the chemistry lab follows approximately a Normal distribution with a mean of 20 minutes and a standard deviation of 3 minutes.

What are the walking times of the middle 90% of the students to walk from the dorms to the chemistry lab?

To find the combined amount of time that the 290 million people in the United States spend annually waiting in line, we need to multiply the average time spent waiting in line per day by the number of people and the number of days in a year.

The average time per day is 5 minutes.

The number of people is 290 million.

The number of days in a year is 365.

To find the combined amount of time, we can use the formula:

Combined time = Average time per day x Number of people x Number of days

Substituting the given values, we get:

Combined time = 5 minutes/day x 290 million people x 365 days

Calculating this expression gives us:

Combined time = 5 x 290,000,000 x 365 minutes/year

Simplifying further:

Combined time = 5 x 105,850,000,000 minutes/year

This can also be written in scientific notation as:

Combined time = 5.2925 x 1011 minutes/year

Therefore, the answer is E. 5.2925 × 1011 minutes a year.