On petri dish a there are currently 5,000 bacteria that procedure 250 bacteria per hour. On petri dish b there are currently 12,000 bacteria, but 100 bacteria die per hour. When will both dishes have an identical bacteria population?
2006-11-16 02:06:43 · 2 answers · asked by khush150 1 in Science & Mathematics ➔ Mathematics
Call the populations P1 and P2 and the time in hours T. P1 = 5000 + 250T. P2 = 12000 - 100T. P1 = P2, solve for T.
Therefore, 5000 + 250T = 12000 - 100T. Subtract 5000 and add 100T to each side: 350T = 7000. Divide by 350: T = 20. The populations will be equal after 20 hours.
2006-11-16 02:13:30 · answer #1 · answered by Amy F 5 · 0⤊ 0⤋
Okay, let h be how long it takes for both petri dishes to have same population.
Then 5000+250h=12000-100h.
I'm assuming you mean produce, instead of procedure.
2006-11-16 02:13:33 · answer #2 · answered by yljacktt 5 · 0⤊ 0⤋