The table shows how the time it takes a train to travel between two cities depends on its average
speed.
Which rational function models the time, y, in
hours, that it takes the train to travel between the
two cities at an average speed of x miles per hour?
DONE
Average Speed, x
(mph)
32
Time, y
(hr)
5
th
40
4
50
3.2
64
2.5

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.