Answer:
Step-by-step explanation:
Use a² - b² = (a + b)(a - b)
144² - 121² = (144 + 121)(144 - 121)
a number less then 6 is the anser so the 1st one
<u>Answer:</u>
112 m³
the solid is a rectangular pyramid with volume (V)
V = × area of base × height = × (8 × 4.2 ) × 10 = 112 m³