The angle of elevation of the sun is 34.5degrees at the instant the shadow cast by an obelisk is  791 feet long. use this information to calculate the height of the obelisk.

You are in charge of the customer service phone line with many employees. at the end of each phone callthe customers are asked to rate their service from 1 to 5 stars, with 5 being the best. you find the averagerating for 20 randomly selected employees and decide you want to improve the ratings so you require thoseemployees to go through a new training program. you then wait a week and find the new average rating foreach employee. the average change is an increase in 1.3 stars with a standard devation of .9 stars.(a) is this data paired or not paired? (b) what are the null and alternative hypothesis being tested? (c) what is the t-statistic you would use? write the general formula and the final calculation.(d) sketch a t-distribution, label your t-statistic and the probability you would be interested in:

First to answer will be the brainliest i need the answer asap

Which expression models the phrase “wally mowed two more lawns than he mowed last week”? n+2 n-2 2-n 2n