Adele is driving her car near the tri-state area. she covers a distance of 221.05 miles in 4 hours. she then stops at a diner, and drives 83 miles more at the same speed. what would be the best estimate of the time she took to cover this last distance?

a.
2 hours
b.
1 hour
c.
2.5 hours
d.
1.5 hours

The answer is D.  1.5 hours

First we need to calculate the speed using the following formula and the given information:

Where:

By substiting we have:

So, to calculate the time she took to cover the last distance, we need to use the calculated speed:

The time she took to cover the last distance is D.  1.5 hours

Have a nice day!

the answer   is 200

step-by-step explanation:

this is a problem about poisson probabilities.   i don't know if you've

already studied poisson distributions, or if you have a place to look

to read more about the subject.  

here's how you can see a poisson distribution coming.   when there are

a lot of events that may happen at any time (or any place), and when

you're counting how many of them happen at a particular time (or a

particular place), and each event is independent of the others, then

the result is a poisson distribution.   this is roughly true for the

chocolate chips; one chip being in a cookie has only a small effect on

the probability that another chip will be in the cookie.

once you know you have a poisson distribution, you know a lot.   there

is only one parameter to a poisson distribution, so if you know the

mean, you know everything.   the form of the distribution is

  probability of n chips = {[e^(-x)]*(x^n)} / (n! )

i believe the correct answer is b.