You made 3/20 of the 400 cards, which is 60 cards.
<span>Standard notation is when a number is completely written out using numerical digits
Hope it helps</span>
Answer:
Step-by-step explanation:
surface area of cube = 6×8² = 384 cm²
lateral area of pyramid = surface area of pyramid - base area
= 384 - 8²
= 320 cm²
area of triangular face = 320/4 = 80 = ½(base)(slant height) = ½(8)(slant height)
slant height = 20 cm
