Question PLEASE ANSWER :) (2 Viewers)

[connie]

1) 4 = 1.65 (1.09)^n
therefore n is approximately equal to 10.25
hence in the year 2010 a can of softdrink will cost $4.00

 

[connie]

2) p(selecting at least 2 bio)= (5/12 x 4/11 x 3/10) + (5/12 x 4/11 x 7/10) + (5/12 x 7/11 x 4/10) + (7/12 x 5/11 x 4/10)
= 4/11

 

[connie]

3 a) A = 2500 [((1.025^40)-1)/.025]
= 168 506.38

 

[connie]

3 b) 168 506.38 - (2500 x 40) = 68 506.38

 

[connie]

Invest (2500/6) $417 per month instead of 2500 every six months because then while you are only investing the same amount of money at the same interest rate, you are earning interest compounding monthly instead of six monthly, therefore you will end up with more


ok well there's the answers to all 3 questions, can you let me know if i am right

 

[cmaddogz]

CONNIE....

1)
CORRECT!... Well done The answer for this question was actually a bit longer, as below, but still u got it right, well done! (Did u use a gfx calc?)
P=1.65(1.09)^n
4=1.65(1.09)^n
try n=5, 1.65(1.09)^5 = 2.539 (too small)
try n=12, 1.65(1.09)^12 = 4.641 (too big)
try n=10, 1.65(1.09)^10 = 3.906 (close but small)
try n= 11, 1.65(1.09)^11 = 4.258 (a bit too big)
Therefore the soft drink will reach $4.00 in the year 2010


2)
CORRECT!... Well done!


3)
a) CORRECT!
b) CORRECT!
c) CORRECT!


So overall - MEGANERD! haha jokes... well done! You did really well on these... Many a person i know found these really hard... Do you have any tough questions?
- M A D D O G Z -

 

[connie]

lol, no i just used the guess and check method, but didn't bother writing all my guesses down, i didnt really find them hard but thats because i dropped from 2 unit and i found that hard...

i haven't come across any questions i haven't been able to get the answer for yet, do you have anymore?

 

[cmaddogz]

haha.. fair enuf connie... well i could probably try and find some more harder questions from around the joint... i'll post them in your new thread you made, aight? I'll see you in there!

- M A D D O G Z -