PLEASE HELP A bacteria culture starts with three cells. Each cell in this culture doubles every hour. After t hours, the number of cells in the culture can be written as 3(2^t) Which of the following correctly interprets the meaning of 2^t in this context?

A. The factor 2^t is the number of hours
B. The factor 2^t is the initial number of cells
C. The factor 2^t is the number of cells after t hours
D. The factor 2^t is the number of cells that each original cell in the culture has produced after t hours.

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.