Please help me with a few multiple choice questions.

Find the simplified form of the expression. Give you answer in scientific notation.
(8*10^7(7*10^4)

A)1.5*10^12
B)5.6*10^12
C)1.5*10^29
D) 5.6*10^29

Question

Please help me with a few multiple choice questions. 

Find the simplified form of the expression. Give you answer in scientific notation. 
(8*10^7(7*10^4) 

A)1.5*10^12
B)5.6*10^12
C)1.5*10^29
D) 5.6*10^29

anonymous · Answer

-(6)^1

A)6
B)1/6
C)-1/6
D)-6

anonymous · Answer

simplify 
(5)^-5(5)^7

A)1/25
B)25
C)12
D)2

anonymous · Answer

(t^-4)^-9t^2 

A)t^26
B)t^-26
C)t^36
D)t^-38

anonymous · Answer

my awnser B,D,A,D,

anonymous · Answer

(8*10^7)(7*10^4) 

56* 10^11
=5.6 * 10^12