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The starting salary for a job is €24 000 per annum - Leaving Cert Mathematics - Question b - 2010

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The starting salary for a job is €24 000 per annum. At the end of each year of employment the annual salary increases by 3%. (i) What will the annual salary be afte... show full transcript

Worked Solution & Example Answer:The starting salary for a job is €24 000 per annum - Leaving Cert Mathematics - Question b - 2010

Step 1

What will the annual salary be after the first increase?

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Answer

To find the annual salary after the first increase, we can use the formula:

S=Pimes(1+r)S = P imes (1 + r)

where:

  • SS is the new salary
  • PP is the starting salary (€24,000)
  • rr is the rate of increase (3% = 0.03)

Substituting the values:

S=24000imes(1+0.03)=24000imes1.03=24720S = 24000 imes (1 + 0.03) = 24000 imes 1.03 = €24 720

Thus, the annual salary after the first increase will be €24 720.

Step 2

What will the annual salary be after the fourth increase? Give your answer correct to the nearest euro.

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Answer

To calculate the annual salary after the fourth increase, we will again use the same formula iteratively or compute it in one step:

S=Pimes(1+r)nS = P imes (1 + r)^n

where:

  • nn is the number of increases (4 in this case)

Substituting the values:

S=24000imes(1+0.03)4=24000imes(1.03)4=24000imes1.1255088127012S = 24000 imes (1 + 0.03)^4 = 24000 imes (1.03)^4 = 24000 imes 1.12550881 ≈ €27 012

Thus, the annual salary after the fourth increase will be approximately €27 012 when rounded to the nearest euro.

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