Answer:
[M⁰L¹T⁰]
Step-by-step explanation:
given expression,
from the expression x = A sin (2 π f t),
A and f are constants
dimension of A =?
As the sine factor is dimensionless means that sine function will not have any dimension it is dimensionless.
so, remaining
x = A sin ()
so, the dimension of x is L
hence, the dimension of A also will be equal to L i.e [M⁰L¹T⁰]
The original area of a face would be a^2. Now that you added b to the edge, the new area of each face would be (a+b)^2. To find how much the are increased, subtract a^2 from (a+b)^2. 
So the answer is b(2a+b)
Hmmm...I don't know what to tell you I can't type out your answer For you.
sorry
You can use a proportion.
4 hours is to 82 miles as 14 hours is to x miles
4/82 = 14/x
Cross multiply to get
4x = 14 * 82
4x = 1148
x = 287
287 miles
