Answer:
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Diameter of a circle is 8 cm. Then find out the area and perimeter of the circle.
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Area of circle is 50.29(≈)cm² and perimeter of circle is 25.14(≈)cm.
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•Given :-
Diameter of the circle = 8 cm.
•To find :-
Area and perimeter of the circle.
• Solution :-
Let the radius of the circle be r cm.
Diameter = 8 cm.
We know,
★
So, Radius (r) = 8/2= 4 cm.
We know,
★
Area of circle= πr²
→Area of circle=
→Area of circle=
→Area of circle= 50.29(≈)cm²
____________________________
We know,
★
Perimeter of circle= 2πr
→ Perimeter of circle=
→Perimeter of circle=25.14(≈)cm
Solve the question and go on from there like you were already doing.
Answer:
9 pm on a Sunday, 55 .5 days before
Step-by-step explanation:
if there were 6 bacteria initially and from the growth rate we noticed that it doubled every 3 hours
because by 9 am Monday morning there were 5328 bacteria and then by 12 noon (3 hours later), there were 10, 656 bacteria
what we need to know is how long did it take 6 bacteria to become 5328
so
if 6 bacteria = 1 hour
12 bacteria = 3 hours
24 bacteria = 6 hours
then
5328 bacteria = x hours
taking the ratio

we need to now convert this into hours
so we divide by 24

so
9 am 55.5 days before should fall on a Sunday
25 remainder 6 is how many times