Transcript Document
Credit Card Bill: $40,000 Annual Interest: 25% What happens if he waits to pay it back? How much will he owe in 10 years? In 20 years? Credit bill after 10 years: $298,023 Credit bill after 20 years: $2,775,558 Why did the money he owes increase so much? Put me, x, as the exponent and you have an equation that grows and grows and grows owes $40,000(1.25 ) x Note: x = the number of years till paid back Exponential Growth Equation Y= x a(b) Starting amount Growth or Decay Factor The Black Death: 1348 and 1350 Death Rate ≈ 75,000,000 The Black Death was carried by Oriental rat fleas living on the black rats Black Death: Exponential Growth Equation for the Spread of the Black Death 32.94 x How many people would have died in 12 months? 1,251,091 Suppose that 1 bacteria lands in your mouth and grows by a factor of 4 each hour. Write an equation that for this situation. Y= x 1(4 ) How many bacterium will be in your mouth after 8 hours? 1,048,576