Answer:
An=9+2(n-1)
Step-by-step explanation:
Just learned this.
Its a arithmetic so it would always be a n-1 however it would be in parentheses after the common different.
Answer: Pupulation = A*0.95^t
where t is the numer of hours that has passed, and A is the initial population of the bacteria.
Step-by-step explanation:
If the initial population of bacteria is A.
After one hour we can see that the population has decreaesed by 5%, so the new population is
P = A - 0.5*A = 0.95*A
After other our, the population decreased by 5% again, the new population is:
P = (0.95*A) - 0.5*(0.95*A) = 0.95*0.95*A = A*0.95^2
And so on.
This is an exponential decay, so we can write this relation as:
Pupulation = A*0.95^t
where t is the numer of hours that has passed, and A is the initial population of the bacteria.
Answer:
<u>Option 4:</u> 10d + 5
Step-by-step explanation:
Given the algebraic expression, 5(2<em>d</em> + 1), which represents the fines per day, <em>d</em>, for overdue books.
In order to determine the equivalent algebraic expression of 5(2<em>d</em> + 1), we must distribute 5 into the terms inside the parenthesis:
5(2d<em> </em>+ 1)
= 5(2d) + 5(1)
Therefore, the equivalent expression is: 10d + 5.
Answer:
22%
Step-by-step explanation:
So First we subtract 90 and 70 = 20
Then we divide 20 by 90 = which gives us approximately 0.22 then we turn that into a percent by moving the decimal point 2x to the right.
So In conclusion, the percent decrease is 22%
Remember the formula is:
amount of change ÷ by the original amount