X^2-81=0
x^2-81+81=0+81
x^2=81
sqrt(x^2)=+-sqrt(81)
x=+-9
x=-9 and x=9
Answer: Options D. -9 and E. 9
Answer:
<h2>23 percent of 250= 57.5</h2>
<h2>56 is what percent of 200= 28</h2>
<h2>36 is what percent of 60= 61.67</h2>
Answer:
No, they are not.
Step-by-step explanation: can I get brainlest?
The initial population was 234.
<em><u>Explanation</u></em>
<u>Formula for the exponential growth</u> is: 
, where P is the initial amount, A is the final amount, r is the rate of growth and t is the time duration.
There was 337 bacteria after 5 minutes and 699 bacteria after 15 minutes. So, the equations will be......
Now dividing equation (2) by equation (1) , we will get .......
<u>Taking 'natural log'</u> on both sides.........
Now, plugging this 
into equation (1), we will get......
So, the initial population was 234.
Answer:
12
Step-by-step explanation:
Im going to divide this up to make it easier
first im going to do the triangle on top which we need the formula for that which would be
(4*2) / 2 which is( base * height )/2 then 4*2 = 8 /2 = 4
then ill deal with the rectangle just below that triangle
which is 3*2 which is 6
then last is triangle which is 2*2 which is 4 / 2 so 2
then add all together
4 + 6 + 2 = 12
