finance (1 Viewer)

[stressedadfff]

does anyone know please

 

[stressedadfff]

and b pleaseee

 

[A1La5]

View attachment 31816
and this please

My attempt:

The top row has one can, the second row has three cans, the third row has five cans, etc. There are also 529 cans in total. The information provided in the question tells us that the formation of cans can be modelled as an arithmetic sequence with the following parameters:

 

[stressedadfff]

and this pleaseee

 

[stressedadfff]

My attempt:

The top row has one can, the second row has three cans, the third row has five cans, etc. There are also 529 cans in total. The information provided in the question tells us that the formation of cans can be modelled as an arithmetic sequence with the following parameters:
View attachment 31822

thank you

 

[jimmysmith560]

View attachment 31815
does anyone know please

Using







I hope this helps!

 

[stressedadfff]

Using View attachment 31824







i.e. (B)

thats what i thought but the answers says A, i think its not compound interest maybe repayments?

 

[jimmysmith560]

thats what i thought but the answers says A, i think its not compound interest maybe repayments?

Oh yeah alright I figured it out I edited my previous post accordingly!

 

[stressedadfff]

Oh yeah alright I figured it out I edited my previous post accordingly!

oh thank you, is that a formula?

 

[jimmysmith560]

oh thank you, is that a formula?

No worries.

Yep! It's called the compound interest formula, which is also expressed as:



I think another way to do this question would be something like this:

Robert invests $320 at the end of the first year.

Robert invests another $320 at the end of the second year, this one earning 7% interest.

320 x 0.07 = 22.4
320 + 22.4 = 342.2

Robert invests another $320 at the end of the third year, earning 7% interest on the amount he had by the end of the second year, which is:
320 + 342.2 = 662.4

662.4 x 0.07 = 46.368

662.4 + 46.368 = 708.768

708.768 + 320 = 1028.768

≈ $1028.77

i.e. (A)

 

[stressedadfff]

No worries.

Yep! It's called the compound interest formula, which is also expressed as:



I think another way to do this question would be something like this:

Robert invests $320 at the end of the first year.

Robert invests another $320 at the end of the second year, this one earning 7% interest.

320 x 0.07 = 22.4
320 + 22.4 = 342.2

Robert invests another $320 at the end of the third year, earning 7% interest on the amount he had by the end of the second year, which is:
320 + 342.2 = 662.4

662.4 x 0.07 = 46.368

662.4 + 46.368 = 708.768

708.768 + 320 = 1028.768

≈ $1028.77

i.e. (A)

thank youuuu!!!!

 

[stressedadfff]

Using View attachment 31827







I hope this helps!

oh i see for this method tho, how come p = 960

 

[jimmysmith560]

oh i see for this method tho, how come p = 960

I set it as 960 because Robert invests $320 at the end of each year. The question is in terms of 3 years.

I think the alternative method I suggested would be better, particularly because the version of the compound interest formula I've initially used is expressed differently than that you'd find on the reference list for Mathematics Advanced.