A2 A skiing instructor charges 22.50 EUR for 45 minutes of instruction. This is equivalent to:
(A) 30 EUR for 1 hour
(B) 0.40 EUR for $1 \mathrm{~min}$
(C) 26 EUR for $50 \mathrm{~min}$
(D) 4.50 EUR for $10 \mathrm{~min}$
(E) 45 EUR for 2 hours
A2 22.50 EUR for 45 min means 0.50 EUR per minute. For $1 h=60$ min, the amount is 60 . $0.50 \mathrm{EUR}=30 \mathrm{EUR}$.