Anil wants to invest £25000 for 3 years in a bank. Personal Bank
Secure Bank
Compound Interest
Compound Interest
2% for each year
4.3% for the first year
0.9% for each extra year
Which bank will give Anil the most interest at the end of 3 years?

Secure Bank

Step-by-step explanation:

for a process to work out the interest after one year e.g. 0.02 × 25000 (=500)

or 0.043 × 25000 (=1075) or for 1.02 or 25500 or 1.043 or 26075

for process to find value of the investment after 3 years or the multiplicative factor for 3

years at one of the banks, e.g. 25000 × 1.02 × 1.02 × 1.02 oe (= 26530…) or 1.023 (=

1.0612…) or 25000 × 1.043 × 1.009 ×1.009 oe (= 26546…) or 1.043 × 1.009 ×1.009 (=

1.0618)

or Secure Bank from correct figures,

eg. 26530.. and 26546.. or 1530… and 1546… or 1.0612... and 1.0618…

step-by-step explanation:

graph using a few selected

x         y

-1       15

0         6

1         2.4

2       0.96

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.