Explain in detail with at least two sentences how to represent the sum of  z  1  and  z  2  geometrically given that  z  1  = -7  i  and  z  2  = 4 + 3  i  .  then, give the sum  z  1  +  z  2  in rectangular form.

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?