What is the standard deviation of the following data set rounded to the nearest tenth? 60,40,35,45,39

Arunning track in the shape of an oval is shown. the ends of the track form semicircles. a running track is shown. the left and right edges of the track are identical curves. the top and bottom edges of the track are straight lines. the track has width 56 m and length of one straight edge 130 m. what is the perimeter of the inside of the track? (π = 3.14) 260.00 m 347.92 m 372.00 m 435.84 m

Write the equation of the circle centered at (10,-2) with radius 2.

Line ab contains points a(4, 5) and b(9.7). what is the slope of ab?