please help!

Question

please help!

anonymous · Answer

http://gyazo.com/9d782800035dc8f78969e61a9239b80a ^^question in link.

tkhunny · Answer

Demonstrate one half-life, please.

anonymous · Answer

130/(2^6)

anonymous · Answer

i have no idea

anonymous · Answer

2 grams??

anonymous · Answer

one half life means you reduce the amount by half which is the same as dividing by 2

anonymous · Answer

yes, 2.03 grams

anonymous · Answer

thankyou! i have another?? @10115658

anonymous · Answer

http://gyazo.com/2cf9297dd3131d783332f14ccc729183 ^^^ in the link

tkhunny · Answer

Demonstrate ONE year at 5.5% and don't you DARE let @10115658 do your work for you, this time.

anonymous · Answer

a=22,000(1+0.055)^11 this is my equation correct??

tkhunny · Answer

That's the spirit.  Why not LEAD with that, rather than posting a question with no work shown?

The half-life problem should have had the same effort.

$130(1 - 0.5)^{6} = 130(0.5)^{6} = 130*0.15625 = 2.03125$

Definitely commit to showing your work up front.

anonymous · Answer

so for my second question the answer i got was 39646 is that right

tkhunny · Answer

See how I showed my work?  Lear to do that and you can answer that question for yourself.

$22000(1 + 0.055)^{11} = 22000(1.055)^{11} = 22000(1.802092404) = $39,646.03$

See how the work can be followed, traced, and reproduced, every step of the way?  This is the standard of performance that will build your personal confidence.

anonymous · Answer

okay thx