*WILL MARK AS BRAINLIEST* How Penicillin Was Discovered
In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes He
noticed that a mold called Penicillium was also growing in some of the dishes A clear area existed
around the mold because all the bacteria that had grown in this area had died in the culture dishes
without the mold, no clear areas were present
Fleming hypothesized that the mold must be producing a chemical thar killed the bacteria He decaded to
isolate this substance and test it to see if it would kill bactenie Fleming transferred the mold to a nutrient
broth solution. This solution contained all the materials the mold needed to grow. After the mold grow he
removed it from the nutrient broth Fleming then added the nutrient broth in which the mold had grown to
a culture of bacteria. He observed that the bacteria died
6. Identify the problem
7. What was Fleming's hypothesis?
8. How was the hypothesis tested?
9. Should the hypothesis be supported or rejected based on the experiment?
10. This experiment load to the development of what major medical advancement?

The surface area of a sphere can be found using the formula SA=4(x)pi(x)R squared. Middleton Middle School wants to paint kickballs purple for their carnival. The kickballs are all the same size. They used 6923.7 inches

of paint when painting 5 kickballs. What is the radius of each purple kickball? Use 3.14 for pi

x=times

Explanation:

answer me question thx for the points

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.