What are the coefficients in this expression?

The correct answer is option 4).  6 and -1/3

Step-by-step explanation:

The given expression is

6a - 3/4 + 7.5 - b/3

From the above expression we can see that two terms have variables.

They are 6a and -b/3

Coefficients of 6a is 6 and,

coefficients of -b/3 is -1/3

Therefore the coefficients of these two terms are 6 and -1/3

So the correct answer is option 4).  6 and -1/3

answer-

the equation that models this pattern is

solution-

a researcher placed a petri dish with 32,000 bacterial cells. one hour after being placed in the vacuum chamber, the number of cells in the petri dish had halved. another hour later, the number of cells had again halved.

this can be represented as exponential decreasing function,

where,

putting the values,

y-intercept means, where x=0, so

the coordinate of this poin will be (0, 32000)

this means when x=0 or at the starting of the research, the number of bacteria cells was 32000.

after 3 hours, number of bacteria cells will be,

the   coordinate of this point will be (3, 4000)