The amount of sum of money in 5 years and eight years Rs 7500 and Rs 9000 respectively find the sum​

What is the measure of the smallest angle in the diagram? 15 29 32 45

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?