Answer:
-1/6
Step-by-step explanation:
B. X= -7; Y= 5
C. X= -5; Y= -7
D. X= 5; Y= 7
Answer:
31.4
Step-by-step explanation:
Circumference = 2 x Radius x π. π = Pi = 3.14, thus, the math to calculate the circumference of a circle with a radius of 5 is: 2 x 5 x 3.14 = 31.4. And the answer to the circumference of a circle with a radius of 5 is approximately: ≈ 31.4.
-https://numbermaniacs.com/circumference/radius/what-is-the-circumference-of-a-circle-with-a-radius-of-5.html#:~:text=Circumference%20%3D%202%20x%20Radius%20x%20%CF%80.%20%CF%80,radius%20of%205%20is%20approximately%3A%20%E2%89%88%2031.4.%20
The population density is 0.418 bacteria per mm².
A circle's area is the area that it takes up in a two-dimensional plane.
The formula for area of circle is, A = πr², where r is the radius of the circle. The unit of area is the square unit, such as m², cm², etc.
Given:
Radius= 40 mm
So, Area of petri dish = πr²
= 3.14x(40 mm)²
= 3.14 x 1600 mm²
= 5024 mm²
and, Population Density
= 2100 / 5024
= 0.418 bacteria per mm²
Hence, the population density is 0.418 bacteria per mm².
Learn more about area of circle here:
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Answer: 69
Step-by-step explanation: Percent multiplied by the total number of students: 8/100 x 75 = 600/100. (remember it is 8/100 because it’s 8%.)
Then you simplify which will then get you 6.
Afterwards you need to subtract those 6 students from the group of 75. 75-6=69. So, 69 students.
Answer:
Where is the a. b. c. or d?