2. Shiela had saved 3,000 in an account that offered r% simple interest per annum in 20 March 2015. If the interest on 6 June 2015 was 50, find the value
of r using Banker's Rule. (7.69%)
3.
Kevin invested 4,000 in an investment scheme on 18th October 2016. The
investment offered a simple interest rate of 5% per annum. By using approximate
time and exact simple interest, find the total interest received on 20th December
2016. (RM33.88)​

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

Which number completes the system of linear inequalities represented by the graph? y> 2x – 2 and x + 4y 2 et 2 3 4

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.