A given bacteria culture initially contains 2000 bacteria and doubles every half hour. The number of bacteria p at a given time t is given by the formula p(t)=2000e^kt for some constant k. (You will need to find k to answer the following) A) find the size of the bacterial population after 20 minutes.

B) find the size of the bacterial population after 6 hours.

If an athlete can bike 6 miles in 25 minutes, how many miles will he bike in an hour and half if he continues to bike at the same rate?

The length of each stair is 11 inches. what is the rise, r, for each stair? round to the nearest inch. 2 inches 7 inches 17 inches 24 inches

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.