Oni was timing her 100-meter sprints. her first five sprints were 12.568 seconds, 11.426 seconds, 12.324 seconds, 11.981 seconds, and 12.601 seconds. which two estimation techniques will give the same result for the total number of seconds for all five sprints? a: front-end and clustering b: front-end and rounding to the nearest tenth c: clustering and rounding to the nearest tenth d: rounding to the nearest tenth and rounding to the nearest hundredth

The answer is D..

Rounding to the nearest tenth and rounding to the nearest hundredth

hope this helps

statement #3: proof- ang is congruent to ang ecd : angles are congruent.  

step-by-step explanation:

1: the missing angles in statement #3  

a.) acb  

reason- the reason why the answer is acb is because angle ecd and angle acb are both the same size *that's what the word congruent means this is really simple.  

2: the missing word in reason #3  

c.) vertical  

reason- the reason why the answer is vertical is because the angles in that diagram on figure 2 is slanted, which is vertical, and the e and a both lay on vertical lines. along with the other's, but e and a are the 2 main points you want to focus on. and c is kind of like your starting point, because c is for both angles, not just one.  

i hope that was and understanding.