What is the slant height of the pyramid to the nearest tenth?

the base is 3cm but you need to divide that by 2 to get to the mid point
so 3 /2 =1.5 cm
now do 1.5^2 + 5^2 = c^2
2.25 +25 = 27.25^2 now take square root of 27.25 to get slant height
5.22mm round answer as necessary