Answer:
5
Step-by-step explanation:
Answer:
9,942 bacteria were there at 10 hours.
Step-by-step explanation:
Equation for population decay:
The equation for population decay, after t hours, is given by:
In which P(0) is the initial population and r is the decay rate, as a decimal.
Researchers recorded that a certain bacteria population declined from 200,000 to 900 in 18 hours.
This means that and that when . So we use this to find r.
So
At this rate of decay, how many bacteria was there at 10 hours?
This is P(10). So
Rounding to the nearest whole number:
9,942 bacteria were there at 10 hours.
A triangle's angles add up to 180 degrees because one exterior angle is equal to the sum of the other two angles in the triangle. In other words, the other two angles in the triangle (the ones that add up to form the exterior angle) must combine with the third angle to make a 180 angle
Answer:
$12.00
Step-by-step explanation:
20% of $60 is $12.
• Answer:
99
• Step-by-step explanation:
Hi there !
use formula a² - b² = (a-b)(a+b)
18² - 15² =
= (18 - 15)(18 + 15)
= 3×33
= 99
Good luck !