The population of mice doubles every 12 hours. There are initially 4 mice. How many mice are there 3 days later?

i am getting in shape and every other day i go for a run and every fifth day i go to dance class. How many times in a 30 day period do i both run and dance?

Annaleigh has dance every 5 days and gymnastics every 4 days. If she has both gymnastics and dance today, in how many days will she have both on the same day?

Jenny is now 18 and Carmen is 12. How many years ago was Jenny twice as old as Carmen?

An apple farm yields an average of 45 bushels of apples per tree when 21 trees are planted on an acre of ground. Each time 1 more tree is planted per acre, the yield decreases by 1 bushel (bu) per tree as a result of crowding. How many trees should be planted on an acre in order to get the highest yield? In order to get the highest yield, trees should be planted on an acre. OCEED

The number of people infected with coronavirus doubles every 3.0 days. How many days does it take for the U.S. to go from one case (patient zero) to all 330,000,000 Americans being infected.

Initially, 10 people have an infection. The next day, every infected people infects one moreperson. If this pattern continues, how many days will it take for 1280 people to be infected?

If sara walks her dog every 3 days, and marsha walks her dog every 2 days, at the end of 60 days, how many days will they have walked their dogs together?

Botanists discover a new plant that lives for only one single year. It germinates in the spring, then in the summer generates 3 new seeds, before finally dying in the fall. Of the 3 seeds generated in the spring, 1 seed germinates the next year, while the other 2 seeds germinate 2 years later. In the year of discovery (call it year 0), botanists find 5 plants and the next year they find 7 plants. If fn can be recursively defined by fn=c₁fn-1 + C2 fn-2 What is C1? What is C2?

at the beginning of an observationally study a culture contains 6000 bacteria. after 3 hours 9500 bateria if the bacteria grew exponecially. janice claims there will be 200000 after 20 hours is she correct