12.A bank pays investors 4% per annum compound interest, compounded half-yearly. Find the original amount Rex invested if he received $5800 as interest at the end of 3 years.

Write your answer correct to the nearest dollar.

Please solve it for me, no unnecessary things or spamming or else I’ll report

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244