A balloon takes 1 minute to rise 60 feet in the air. Each minute after that, the balloon rises 40% as far as it did the previous minute. Which equation finds the distance, d, the balloon rises in 6 minutes?
We will compute first individually The distance at 1 min. =60 At 2 minutes= 60 +0.4*60 = 84 At 3 minutes = 84 +0.4*84 = 117.6 At 4 minutes = 117.6 + 0.4*117.6 = 164.64 At 5 minutes = 164.64 + 164.64*0.4 = 230.5 At 6 minutes = 230.5 + 230.5*0.4 = 323
Since the answer is letter "B" when we calculate using this equation in B, we will arrive at the same answer at 6 minutes:
