Use the summation formula to find a partial sum of a series with the following properties
Geometric
a1= -11
a7= -45,056
n= 7
r= -4

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Marion has a bicycle that she is planning to take for a ride. the rim of the rear wheel lies 41 cm from the center of the wheel. the tire itself has a thickness of 3 cm. in order for marion to ride her bicycle 96,712 cm approximately how many rotations will the rear wheel make?