The following formula is for the area, A, of the curved surface area of a cone.
where r is the radius and / is the slant height of the cone.
Calculate the total surface area of a cone with radius 6 cm
and slant height 13 cm.

A = 244.92 cm² or 78π

Step-by-step explanation:

A = πrl

r = 6 cm

l = 13 cm

π ≈ 3.14 cm

A = 3.14 × 6 × 13

A = 3.14 × 78

A = 244.92 cm²

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.