Abasket contains 1.25kg of apples, 2.3kg of grapes and 3.12kg of bananas. if 1kg of apples cost $4, 1kg of grapes cost $3.50 and 1 kg of bananas cost $1.65.

a) calculate the total cost of all the fruits in the basket.

b) mrs lim gave the cashier $50 note. how much change would she receive if she bought 5kg of apples and 2.4kg of bananas.

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.