Show that the average straight-line distance to a fixed point on the surface of a sphere of radius a (averaged over the whole surface of the sphere) is 4a/3. [Suggestion: Take the sphere centered at the origin, and choose the "north pole" as the fixed point.]

Which equation and solution can be used to solve this problem? thirteen less than a number is sixteen. 13-n=16: add 13 to both sides. the answer is 29. n+13=16: subtract 13 from both sides. the answer is 3. n+16=13 subtract 13 from both sides. the answer is 3. n-13=16: add 13 to both sides. the answer is 29.

Easy points boii. read it. ya. fresh

Angel entered a triathlon (a three-part race). he swam 1 mile, rode his bike 30 miles, and ran 10 miles. how far did he go altogether? a. 11 miles b. 123 miles c. 41 miles d. 40 miles