The combined land area of the countries a and b is 188973 square kilometers. country a is larger ny 673 square kilometers. determine the land area of each country

x+y=18897

x=y+673

2y+673 = 18897

2y = 18224

y= 9112

x = 9112+673 = 9785

9112 + 9785 = 18897

 so one country is 9112 and the second country is 9785

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)