# additional mathematics...pls help!!

posted by
**sherlyn** on
.

Ang, Bakar and Chandran are friends and they have just graduated from a local university. Ang works in a company with a starting pay of RM2000 per month. Bakar is a sales executive whose income depends solely on the commission he receives. He earns a commission of RM1000 for the first month and this commission increases by RM100 for each subsequent month. On the other hand, Chandran decides to go into business. He opens a cafe and makes a profit of RM100 in the first month. For the first year, his profit in each subsequent month is 50% more than of the previous month.

In the second year, Ang receives a 10% increment in his monthly pay. On the other hand, the profit made by Chandran is reduced by 10% for each subsequent month

1(a)how much does each of them receive

at the end of the 1st year?(2 or

more methods are required for this

question)

(b)what is the percentage change in

their total income for the 2nd year

compared to the 1st year?comment on

the answers.

(c)Ang, Bakar and Chandran, each

decided to open a fixed deposit

account of RM10000 for 3 years

without any withdrawal.

-Ang keeps the amount at an

interest rate of 2.5% per annum

for duration of 1 month renewable

at the end of each month.

-Bakar keeps the amount at an

interest rate 3% per annum for

duration of 3 months renewable at

the end of every 3 months.

-Chandran keeps the amount at an

interest rate of 3.5% per annum

for a duration of 6 months

renewable at the end of every 6

months.

(i) Find the total amount each of them

will receive after three years.

(ii) Compare and comment on the

different in the interests

received. If you were to invest

RM10000 for the same period of

time, which fixed deposit account

would you prefer? Give your

reasons.

FURTHER EXPLORATION

2(a)When Chandran's first child, Johan is born, Chandran invested RM300 for him at 8% compound interest per annum. He continues to invest RM300 on each of Johan's birthday, up to and including his 18th birthday?

(b)If Chandran starts his investment with RM500 instead of RM300 at the same interest rate, calculate on which birthday will the total investment be more than RM25000 for the first time

1(a)RM24000

Ang, Bakar and Chandran are friends and they have just graduated from a local university. Ang works in a company with a starting pay of RM2000 per month. Bakar is a sales executive whose income depends solely on the commission he receives. He earns a commission of RM1000 for the first month and this commission increases by RM100 for each subsequent month. On the other hand, Chandran decides to go into business. He opens a cafe and makes a profit of RM100 in the first month. For the first year, his profit in each subsequent month is 50% more than of the previous month.

In the second year, Ang receives a 10% increment in his monthly pay. On the other hand, the profit made by Chandran is reduced by 10% for each subsequent month

1(a)how much does each of them receive

at the end of the 1st year?(2 or

more methods are required for this

question)

(b)what is the percentage change in

their total income for the 2nd year

compared to the 1st year?comment on

the answers.

(c)Ang, Bakar and Chandran, each

decided to open a fixed deposit

account of RM10000 for 3 years

without any withdrawal.

-Ang keeps the amount at an

interest rate of 2.5% per annum

for duration of 1 month renewable

at the end of each month.

-Bakar keeps the amount at an

interest rate 3% per annum for

duration of 3 months renewable at

the end of every 3 months.

-Chandran keeps the amount at an

interest rate of 3.5% per annum

for a duration of 6 months

renewable at the end of every 6

months.

(i) Find the total amount each of them

will receive after three years.

(ii) Compare and comment on the

different in the interests

received. If you were to invest

RM10000 for the same period of

time, which fixed deposit account

would you prefer? Give your

reasons.

jawab la sendiri. Pemalas