She should use a computer to select 30 students at random then ask which ones play chess. The other options could produce more skewed results.
The answer would be 7,6,5,4,3,2,1 inches tall in the chronological order
2×2=4
4÷2=2
4+2=6
4+2+6=12
we know that,
put a number you like anything I will write x°
x°+12°=90°
90°-12°=78°,,
again,
78°-12°=66°,,
now,
remove 6° from 60°
60
-----
12
=5,,
If 
and 
, separate variables in the differential equation to get
Integrate both sides:
Use the initial condition to solve for 
:
Then the particular solution to the initial value problem is
(A)
