Answer:
After 5 hours, the amount of bacteria increased: 7800-6000=1800
After 1 hours, the amount of bacteria increased: 1800/5=360
After 18 hours, the amount of bacteria increased: 360*18 = 6480
=> Total amount of bacteria after 13 hours: 6000+6480 =12480
The two rectangles are similar and the scale factor is 3:4
I have no clue but using division may be an option
The bottom model shows 20%
Maria. You can check by dividing 8 into 3 and 3 into 8.
