two trains leave Cleveland at the same rime. one train travels east and the other travels west. the speed of the westbound train is 4mph greater than the speed of the eastbound train. After 3 hours, they are 660 miles apart. find the rate of each train . assume that the trains travel in a straight line in directly opposite directions. ​

b. is true. hope this . happy

11  

13

15

hope this

where is the graph or the picture? ?

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)