Sum of squares of differences in ranks-25.5, n=10, an item 20 is repeated 4 times and another item 22 is repeated 3 times in case of X series and 24 is repeated 2 times in case of y series, coefficient of rank correlation is a) 0.70 b) 0.80 c) 0.85 d) none

Can someone me i’m confused. will give brainliest and a whole bunch of points

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126 a. the attendance was never the same at both plays. b. the attendance was the same on day 5. the attendance was 231 at both plays on that day. c. the attendance was the same on day 13. the attendance was 295 at both plays on that day. d. the attendance was the same on days 5 and 13. the attendance at both plays on those days was 231 and 295 respectively.

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6