The correct options regarding the circle with endpoints of the longest chord at (4, 5.5) and (4, 10.5) are:
- The radius is of 2.5 units.
<h3>What is the equation of a circle?</h3>
The equation of a circle of center
and radius r is given by:

The center is the <u>midpoint of the chords</u>, hence:
.
.
The radius is half the distance between the chords, hence:
.
Hence the equation is:



More can be learned about the equation of a circle at brainly.com/question/24307696
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Answer: 495 bacteria in 2 minutes.
Step-by-step explanation:
We would apply the formula,
y = ab^t
Where
a represents the initial amount of bacteria.
t represents the doubling time.
From the information given
a = 10
t = 15 seconds
Since after 15 seconds, the amount of bacteria multiplies by 2, then
y = 2 × 10 = 20
Therefore
20 = 10 × b^15
Dividing through by 10, it becomes
2 = b^15
Raising both sides of the equation by 1/15, it becomes
2^(1/15) = b^15/15
b = 1.047
The equation becomes
y = 10(1.047)^t
For t = 2 minutes(2 × 60 = 120 seconds), then
y = 10(1.047)^120
y = 495 bacteria
Answer: 9
Step-by-step explanation:

Two hours and twelve minutes
60/5 = 12
12*2+12+12*3+12*4+12=
24+12+36+48+12=132
60+60=120
132-120=12
two hours and twelve minutes
The coordinate grid of the ordered pair is gotten from the combination of the y and X axis of the graph.
<h3>Finding of the ordered pair</h3>
Using the coordinates, an ordered pair for the given point is:
- G = (4,3) because the 4 corresponds to the point in y axis and 3 on the X axis.
- H= (10,8) because the 10 corresponds to the point in y axis and 8 on the X axis.
- J= (6,4) because the 6 corresponds to the point in y axis and 4 on the X axis.
- K= ( 2,1) because the 2 corresponds to the point in y axis and 1 on the X axis.
Learn more about coordinate grid here:
brainly.com/question/20362114
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