45. sin 165° 46. tan 105° 47. cos 12 48. sin(-) 12 49. cos 80° cos 20° + sin 80° sin 20° 50. sin 70° cos 40° - cos 70° sin 40° 51. tan 52. sin 8.

QUESTION 9 Subtract 6.993 from 8.3.

Please answer part d, e and f.

The population of mice doubles every 12 hours. There are initially 4 mice. How many mice are there 3 days later?

If 36 * 20/100 = 7.20 and 36 + 7.20 = 43.20 and X * 20/100 = Y and X + Y = 49.51 What are the values of X and Y?

During his short stint as Shadow Finance Minister, Barnaby Joyce displayed a curious grasp of numbers. One of his most infamous exclamations was “All this billions, quillions, Brazilians.” Less well known was his tax-reform proposal, recommending that if you earn $x per day, you are taxed x% of that amount (with the understanding that you pay 100% tax if you earn $100 or more per day. Under Senator Barnaby’s plan, which amount x gives you the highest earnings after tax has been taken out?

Mr Chia purchased some colour files. 2/5 of them were red and the rest were blue. Mrs Lam bought 1/2 of the red and 1/3 of the blue ones from him. Mr Chia then found that he had 90 colour files left. How many colour files did Mrs Lam by altogether?

A farmer knows that of every 50 eggs his chickens lay, only 45 will be marketable. If his chickens lay 1900 eggs in a week, how many of them will be marketable?