Mathematics, 12.01.2021 22:50 krlx
The population of bacteria in a petri dish doubles every 40 seconds. The population of the bacteria is initially 400 organisms. What unit is most appropriate for the time at which the number of bacteria is 300?
A. Hour
B. Bacteria per hour
C. Second
D. Bacteria per second
Answers: 2
Mathematics, 21.06.2019 14:10
Which linear equations have an infinite number of solutions? check all that apply. (x – 3/7) = 2/7(3/2x – 9/14)8(x + 2) = 5x – 1412.3x – 18 = 3(–6 + 4.1x)(6x + 10) = 7(x – 2)4.2x – 3.5 = 2.1 (5x + 8)
Answers: 3
Mathematics, 21.06.2019 23:00
Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.
Answers: 2
Mathematics, 21.06.2019 23:00
Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.
Answers: 3
Mathematics, 21.06.2019 23:30
Aprisoner is trapped in a cell containing three doors. the first door leads to a tunnel that returns him to his cell after two days of travel. the second leads to a tunnel that returns him to his cell after three days of travel. the third door leads immediately to freedom. (a) assuming that the prisoner will always select doors 1, 2 and 3 with probabili- ties 0.5,0.3,0.2 (respectively), what is the expected number of days until he reaches freedom? (b) assuming that the prisoner is always equally likely to choose among those doors that he has not used, what is the expected number of days until he reaches freedom? (in this version, if the prisoner initially tries door 1, for example, then when he returns to the cell, he will now select only from doors 2 and 3.) (c) for parts (a) and (b), find the variance of the number of days until the prisoner reaches freedom. hint for part (b): define ni to be the number of additional days the prisoner spends after initially choosing door i and returning to his cell.
Answers: 1
The population of bacteria in a petri dish doubles every 40 seconds. The population of the bacteria...
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