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Mathematics 23 Online
OpenStudy (oleg3321):

some one please help

OpenStudy (oleg3321):

OpenStudy (oleg3321):

only part c

OpenStudy (oleg3321):

please help @jdoe0001

OpenStudy (jdoe0001):

well... if you have part B done... then.... is just a matter of plugging in the years, or 20 into it

OpenStudy (oleg3321):

well part b answer is "2. it is non-linear because the difference in the amount between two successive years keeps increasing."

OpenStudy (oleg3321):

but can you show me the steps with the answer for part c please

OpenStudy (jdoe0001):

hmmm part B is supposed to be the function itself

OpenStudy (jdoe0001):

part C depends on part B

OpenStudy (oleg3321):

well can you help me with both parts then i guess please

OpenStudy (jdoe0001):

well... have you got part A yet?

OpenStudy (oleg3321):

part A is "Option 1 is linear because for each year the amount increases by the same amount of $100."

OpenStudy (jdoe0001):

? of 100? for option 1? notice the table a bit closer keep in mind that she starts off with $1,000

OpenStudy (oleg3321):

can you then please explain all parts a part a b and c? i would really appreciate it

OpenStudy (jdoe0001):

well... look at the values in option say 2 she starts off with \(\large \begin{array}{ccllll} years&amount \\\hline\\ 0&1,000\\ 1&1,300\\ 2&1,600\\ 3&1,900 \end{array}\) so... what do you think? how much is it increased by yearly? is there a pattern?

OpenStudy (oleg3321):

300

OpenStudy (jdoe0001):

so... she's gettting 300 more, every year any ideas on the equation for that?

OpenStudy (oleg3321):

so the answer for part a is "Option 1 is linear because for each year the amount increases by the same amount of $300."

OpenStudy (jdoe0001):

it'd be,yes

OpenStudy (oleg3321):

how about part b

OpenStudy (jdoe0001):

well... what do you think would be the equation for option 1? the 300 one

OpenStudy (oleg3321):

idk

OpenStudy (oleg3321):

can you just show me how you find it

OpenStudy (jdoe0001):

let's say, we want to find how much Belinda has today we know how much she had last year so... let's say she had "P" amount last year how much would she have this year with option 2?

OpenStudy (oleg3321):

We can make the assumption the interest is compounded annually for option 2 and use the compound interest formula and see if we can find an equation: A=P(1+rn)nt . Here n = 1 (if compounded yearly) and so A = P(1+r)^t

OpenStudy (oleg3321):

P = 1000 A = 1000(1 + r)^t t = 1, A = 1100 1100 = 1000(1+r)^1 1+r = 1100/1000 = 1.1 r = 1.1 - 1 = 0.1 Let us see if this will work for t = 2 A = 1000(1.1)^t when t = 2 A = 1000(1.1)^2 = 1210 (which agrees with 1210 for year 2) Let us try t = 3: A = 1000(1.1)^3 = $1331 (agrees with year 3) So the function for option 2 is: f(n) = 1000(1.1)^n

OpenStudy (oleg3321):

i found this on the internet. is this suppose to do anything with part B

OpenStudy (oleg3321):

For option 1) f(n) = 100n + 1000

OpenStudy (jdoe0001):

well... I don't thiink is annually compounded, so that'd be if the quantity were compounded annually

OpenStudy (oleg3321):

this is so confusing. can you please show me the steps with answers please my online homework is about to end in 6 minutes

OpenStudy (jdoe0001):

well... the steps are there already in the material.... get the linearity of the values, get the equation for it, and then plug in 20 in the equation, see which one gives the greatest amount in 20 years

OpenStudy (oleg3321):

@jdoe0001

OpenStudy (oleg3321):

@study100 can you help me with part b and c please im in a hurry

OpenStudy (oleg3321):

please help with part b and c

OpenStudy (anonymous):

Part B: option 2 = C + 300n while C= 1000, so plug in

OpenStudy (oleg3321):

2=1000+300n

OpenStudy (oleg3321):

is that right

OpenStudy (oleg3321):

@study100

OpenStudy (anonymous):

Hm f(n) = 1000 +300 n for option 2 Option 1 f(n) = 1000 (1.3)^n

OpenStudy (anonymous):

I took 1690 /1300 equals to 1.3

OpenStudy (anonymous):

Now that you have the equation for option 1 and 2 plug n=20 for each equation to compare which one is greater.

OpenStudy (anonymous):

option 1 : f(n) = 1000 (1.3)^n option 2: f(b) = 1000 + 300n plug in n you have f(20)= 1000 (1.3)^20 f(20) = 1000 + 300(20) then compare

OpenStudy (anonymous):

Hm it seems like I can't message you ;u; am I blocked?

OpenStudy (oleg3321):

no

OpenStudy (oleg3321):

why cant you message me what does it say cause i didnt block you.here ill take a picture for proof

OpenStudy (oleg3321):

OpenStudy (oleg3321):

look at the picture i didnt block you

OpenStudy (oleg3321):

so can you please give me the answers please. my time is over but i could still get half credit, please give me the answers

OpenStudy (anonymous):

Part B: option 1 : f(n) = 1000 (1.3)^n option 2: f(b) = 1000 + 300n Part C:plug in n you have f(20)= 1000 (1.3)^20 f(20) = 1000 + 300(20) then compare: Answers option 1: 190049.64 dollars option 2: 7000 dollars. option 1 is the better choice

OpenStudy (oleg3321):

@study100 do i have to pick a option or do i write them all down like you put them?

OpenStudy (anonymous):

Part B, write all Part C: write things below "Answers" but next time I hope you have more time working these out so you understand them.

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