A circular Petri dish has a diameter of 10 centimeters. If the dish contains 2.450 bacteria, what is thepopulation density of bacteria in the dish?
(1) 31 bacteria per square centimeter
(2) 42 bacteria per square
centimeter
(3) 48 bacteria per square centimeter
(4) 51 bacteria per square centimeter
Answers
Answer: 31 bacteria per square centimiter.
Step-by-step explanation:
The correct number of bacteria in the question is 2,450.
Hi, to answer this question we have to apply the next formula:
Area of a circle = π x (diameter/2) ^2
Replacing with the values given:
A = π x (10/2) ^2
A = π x (5) ^2
A = π x 25 = 78.54 cm2
Next, we have to divide the number of bacteria (2,450) by the area of the dish
2450 / 78.54 = 31.19 = 31 bacteria per square centimiter.
Feel free to ask for more if needed or if you did not understand something.
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what is the longest flagpole (in whole feet) that could be shipped in a box that measures 2 ft by 2 ft by 12 ft?
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Answer: =
Step-by-step explanation:
* Hopefully the work below helps:) Mark me the brainliest if this was helpful:)
Answers
Answer:
He can rent 3 movies
Step-by-step explanation:
Consider the provided information.
It is given that Jason wants to use his earnings from Monday and Tuesday for online movie rentals. movies cost $2.96 each to it.
On Monday he sold 11.9 pounds of cans in on Tuesday he sold 10.7 pounds of cans.
Total pounds of cans he sold is:
11.9 + 10.7 = 22.6 pounds
He sold 22.6 pounds of can.
1 pound of can equals 0.40
Thus the total amount is:
22.6 × 0.40 = 9.04
So, total earning of two days is $9.04
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Answers
13 rolls can Danika buy with $20.00.
Given that, wrapping paper is on sale at 3 rolls for $4.25.
What is the unitary method?
The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.
The cost of 1 roll = 4.25/3
=$1.47
Number of rolls = 20/1.47
= 13.6
Therefore, 13 rolls can Danika buy with $20.00.
To learn more about the unitary method visit:
brainly.com/question/22056199.
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Answers
45 = 15% × n
15% =
45 = 0.15n
0.15 and 0.15 cancels out
300 = n
15% of 300 is 45
45 is 155 of 300
15% × x = 45
x = 45 ÷ 15%
x = 45 ÷ 15/100
x = 45 × 100/15
x = 4500/15
x = 300
Check:
15% × 300
= 15/100 × 300
= 15 × 3
= 45
45 is 15% of 300.
Answers
B. 28.53 units²
C. 33.08 units²
D. 27.28 units²
Answers
Answer:
Option B
Step-by-step explanation:
The area of quadrilateral ABCD is equal to the area of triangle ABD plus the area of triangle ADC
we know that
Heron's Formula is a method for calculating the area of a triangle when you know the lengths of all three sides.
Let
a,b,c be the lengths of the sides of a triangle.
The area is given by:
where
p is half the perimeter
step 1
Find the area of triangle ABD
we have
Find the half perimeter p
Find the area
step 2
Find the area of triangle ADC
we have
Find the half perimeter p
Find the area
step 3
Find the total area
Answer:
B.) 28.53 units²
Step-by-step explanation:
I got it correct on founders edtell