# Question: question 23 6 marks marksa evanandrsquos height h cm over...

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Question 23 (6 marks) Marks

a) Evan’s height, h cm, over his first 20 years can be modelled by the formula: 2 ℎ = 5.8𝑎 + 70 where a = age in years Use the formula, to calculate at what age Evan reached a height of 148 cm. Give your answer in years correct to one decimal place.

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b) Jalal bought a new car that had a cash price of $35 200. He paid a 20% deposit plus 3.75% p.a. flat interest on the balance. Calculate: i) the balance owing after the deposit was paid.

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ii) the monthly repayment if Jalal made equal monthly repayments over 4 years. 3 …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… …………………………………………………………………………………… End of Question 23