Use any letter "x" is the usual one but since you have 2 you can use 2 different ones.
Answer:
418 ft^3
Step-by-step explanation:
V=whl=2·19·11=418ft³
Answer:
Probability of sum of pips on two faces is at least 9 = 
Step-by-step explanation:
Experiment: Throwing two fair dice.
Total no of Outcome =
= 36
Sample space (list of outcome) is attached.
Let E be the event that sum of pips on two faces is at least 9.

Favorable outcome are where sum is 9 , 10 , 11 and 12.
From Sample space, No. of Favorable outcome = 10
∴ 

The value of tan3x must be greater than the value of cos3x, because it is subtractable by a lesser value.