Find the surface of a square pyramid with a base edge 9 and slant height 6

Surface area of a square pyramid = a2 + 2al =  81 + 2  ( 9 )  ( 6) = 189

Step-by-step explanation:

Surface area of a square pyramid = a2 + 2al

where,

a = base length of square pyramid  = 9

l = slant height or height of each side face = 6

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,