The number of bacteria in a culture is `x` now. It becomes square of itself after one week. What will be its number after two weeks?

The population of a certain species of insects is x now. It becomes y times itself after one week. What will be its population after 2 weeks?

Rohan spends Rs. x daily and saves Rs. y per week. What is his income after 3 weeks?

The rate of increase of the bacteria in a culture is proportional to the number of bacteria present and it is found that the number doubles in 6 hours. Prove that the bacteria becomes 8 times at the end of 18 hours.

The rate of increase in the number of bacteria in a certain bacteria culture is proportional to the number present. Given the number triples in 5 hrs., find how many bacteria will be present after 10 hours. Also find the time necessary for the number of bacteria to be 10 times the number of initial present. [Given log_e3=1. 0986 ,\ e^(2. 1972)=9 ]

Ken is working this summer as part of a crew on a farm. He earned $8 per hour for the first 10 hours he worked this week. Because of his performance, his crew leader raised his salary to $10 per hour for the rest of the week. Ken saves 90% of his earnings from each week. What is the least number of hours he must work the rest of the week to save at least $270 for the week?

A microbiologist is studying the effects of a new antibiotic on a culture of 20,000 bacteria. When the antibiotic is added to the culture, the number of bacteria is reduced by half every. What king of function best models the number of bacteria remaining in the culture after the antibiotic is added?

The initial count of bacteria is x and it becomes y times every day. The total count of backteria after one week is (a) 7\ x y (b) x+7y (c) x y^7 (d) x y^6

A scientist studies Bacteria Culture A, which grows then percent every hour. Bacteria Culture A initially contained 200 microbes, and she models the growth using the equation n=200(m)^(h) , where n is the number of microbes and h is the number of hours. Q. The same scientist also studies another culture, Bacteria Culture B, which grows 15% every hour. The two cultures began at the same time with the same number of microbes. After 20 hours, how many more microbes will becteria Culture B contain than Bacteria Culture A ? (Round your answer to the nearest whole number).

It was observed in an experiment that the number of bacteria doubles evey hour. It was found that the number of bacteria twelve hours from the start of observation was 40960. After how many hours from the start of the experiment would the number of bacteria has been one-fourth the final number of bacteria?

In a certain culture the number of bacteria at any instant increases at a rate proportional to the cube root of the number present at that instant. If the number becomes 8 times in 3 hours, when will the number be 64 times?