Apps. and Interpretation for IBDP Maths Ebook 1 | Page 81

4. A new coffee shop starts its business on 1st March, 2017. Its profit is EUR 2000 in the
first month and increases by 15% every month.
(a) Find the coffee shop’s profit in November 2017.
(b) Find the coffee shop’s total profit in 2017.
On 1st March, 2017 a new fast food shop nearby starts its business as well. Its profit is
EUR 4000 in the first month and increases by EUR 1100 every month.
(c) Find the fast food shop’s profit in June 2018.
[2]
(d) The fast food shop’s profit first exceeds EUR 30000 in the m th month. Find the
value of m .
[3]
(e) The fast food shop’s total profit is less than the coffee shop’s total profit for the
first time in the n th month. Find the value of n .
[4]
[2]
[3]
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