PSAT's

[Ruhiel]

One of them was just a stupid mistake. As usual.

Here it is:

At a certain company, the number of production employees was increased from 300 to 390. The number of clerical employees was increased by twice the percent increase of the production employees. If the final number of clerical employees was 192, what was the original number of clerical employees.

It should have been 120, because 192/1.6 = 120
However, I somehow got 115? I don't even remember how I did it.

The other one was actually another stupid mistake now that I think about it. I won't bore you. I just spilled stupid juice all over that problem.

However, the multiple choice one I missed was yet again another exponential expression:

The initial number of elements in a certain set is p, where p>0. If the number of elements in the set doubles every hour, which of the following represents the total number of elements in the set after exactly 48 hours?

a. 24p
b. 48p
c. 2p^24
d. (2^48)p
e. (2p)^48

I said E. It was D.
EDIT: Ugh, the 8) was an 8 and a )