If A ∆ B = A × (A + 2B) = A² + 2AB, then
• 1 ∆ B = 1 + 2B
• 4 ∆ (1 ∆ B) = 4 ∆ (1 + 2B) = 24 + 16B
• 2 ∆ (4 ∆ (1 ∆ B)) = 2 ∆ (24 + 16B) = 100 + 64B
In 2006, 86% of U.S. households had cable TV. Choose 3 households at
random. Find the probability that
Someone help me please
How long does it take the Moon to make one revolution around Earth? about 365 days
about 29 days
about 7 days
about 24 hours