Since the question seems to either miss a variable, or is phrased wrong, I will answer with this. It will take 13 fridays, or 13 weeks for 20 to add up to a number greater than 250.<span />
Answer:
100 points
Step-by-step explanation:
maths and more maths
Answer:lesser
Step-by-step explanation: the more zeros after the point means lesser
We're looking for a solution of the form 
. By the chain rule, this solution should have total differential
and the equation is exact if the mixed second-order partial derivatives of 
are equal, i.e. 
.
The given ODE is exact, since
Then
With 
, we get
she can count the number of row and the number of square in each row, or she can add 6 and 8
