Which expression could be a calculator’s display for the number 135,000,000,000,000?

A.
0.135e15

B.
1.35e14

C.
13.5e13

D.
134e−14

Question

Which expression could be a calculator’s display for the number 135,000,000,000,000?
 
 A.
0.135e15
 
 B.
1.35e14
 
 C.
13.5e13
 
 D.
134e−14

tkhunny · Answer

Give it your best opinion.  Always show YOUR work, first.

anonymous · Answer

well i have no idea can you help me get the answer

tkhunny · Answer

It's an eyeball problem.

1) Scientific notation usually begins with one value left of the decimal.  This single rule eliminates all but one response.

2) Count how many decimal places must be moved to accomplish #1.

That's really all there is.

As far as you having no idea, I simply don't believe it unless you sleep through 100% of your classes.

anonymous · Answer

thats mean im asking for your help not ur dumb judgement

anonymous · Answer

then is it B

tkhunny · Answer

You see, I was right.  You DO have some idea.   Good work.  I had more confidence in you than you had in you.  Are you sure that's "dumb judgment"?  Sounds pretty insightful, to me, certainly after you proved it to be correct.

Move on to the next one.