Question

algebra

Answer 1

@welshfella

Answer 2

this is compound interest and the general formula is
Amount = P( 1 + (r/100)^ n

where P = starting amount, r = rate per cent and n = number of years

just plug in the given values

Answer 3

250(1+10.3)^40?

Answer 4

@welshfella

Answer 5

not quite its not 10.3 but 10.3/100 = 0.103

Answer 6

250(1+0.103)^40