The surface area, SA of a right circular cone is SA = πr2 + πrs, where r is the radius of the circular cone and s is the slant height. Using rounding to the nearest whole number, which of the following is an estimate of the volume of a cynlinder with a radius of 4.42 meters and a slant height of 2.61 meters?

84 m^2

Step-by-step explanation:

SA = πr^2 + πrs

r = 4.42 rounding to the nearest whole number = 4

s = 2.61 rounding to the nearest whole number = 3

pi = 3.14 rounding to the nearest whole number = 3

SA = 3 * 4^2 + 3 * 4*3

     = 3 *16+ 12*3

     = 48+ 36

     = 84 m^2

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry