What is the surface area of the cone
a. 460 in^2
b. 390 in^2
c. 425 in^2
d. 360 in^2

Surface area of the cone = 360π in²

Step-by-step explanation:

Formula for the surface area of a cone is,

Surface area = πr(r + l)

Here 'r' = radius of the circular base of the cone

l = Lateral height of the cone

Now we substitute the values in the formula from the figure attached,

Surface area = π(10)(10 + 26)

                     = 360π in²

Therefore, surface area of the cone will be 360π in².

a28=58

step-by-step explanation:

a1=a1+(n-1)d

a28= 4+ (28-1)2

a28=4+(27)(2)

a28=4+54

a28=58