I hope this is easy for you guys, because it is most certainly not for me...

1) Brandon Filop had seven times as many pennis as Billy Wang. When Brandon gave Billy 9 pennies, he still had 36 more pennies than Billy. How many pennies did Brandon have originally?

2)The number of digits in the number $\displaystyle (2^{1995})(5^{1992})$ is:

a)3885

b)1992

c)1993

d)1994

e)1995

3)The express $\displaystyle 6\sqrt{2}+\sqrt{32}$ is equivalent to

a) $\displaystyle 7\sqrt{34}$

b) $\displaystyle 20$

c) $\displaystyle 10\sqrt{2}$

d) $\displaystyle 6\sqrt{34}$

e) $\displaystyle 6\sqrt{64}$

4) If $\displaystyle 7^{d-4}=\frac{1}{49}$, then d=

a) 6

b) 4

c) 2

d) -2

e) -3

5) A rectangular tank contains water to a depth of 11 cm. The base of the tank measures 5 cm by 7 cm. If all the water in the bank is poured into an empty cylindrical tank of base radius 5 cm and there is no water overflow, find the depth of water in the cylindrical tank.

Thanks for helping me guys!