Applying and analysing exponential and logarithmic functions

One estimate says that the typical November attendance at Disneyland is approximately 6 × 10⁵ visitors. December attendance is typically double that of November. About how many people visit Disneyland in December?

• 1.2 x 10⁵ visitors
• 1.2 x 10¹⁰ visitors
• 1.2 x 10⁶ visitors
• 6 x 10¹⁰ visitors

Shawn is buying a new Jet Ski for $12,500. He is considering 2 credit options. Option A offers a 6 year loan with 8.5% interest compounded quarterly, while Option B offers a 5 year loan with10% interest compounded annually.Which option is better and how much will he save?

• A) A; $495.21 raise money for charity
• B) A; $573.83 get attention
• C) B; $495.21 get on the news
• D) B; $573.83 do something crazy

The amount (in grams) of the radioactive isotope rubidium-86 remaining after t days is y=a(0.5)^t/19, where a is the initial amount (in grams). What percent of the rubidium-86 decays each day?

• 5%

• 50%

• 3.58%

• 35.8%

• 1326

• 8150

• 6
  

• 13264

• Rate

• Starting Amount

• Interest as a decimal

• Final Amount

Freddy deposits $900 into a savings account that earns 12% interest per year, compounded quarterly. If he makes no additional deposits or withdrawals, how much money will be in the account after 2 years?

Round to the nearest dollar.

Estimate the half-life of the radioactive substance shown in the graph:

• 6 months

• 6 hours

• 1 year

• 1 minute

You put $2000 in the bank and earn interest at a 2.5% rate compounded monthly. How much will you have after 15 years?

• $30,758.65

• $2,001.56

• $2,908.85

• $2,896.60

Town Bank offers a 2.25% interest rate, while Charter One offers 2.8%. Both banks compound interest annually. If Rob wants to set up a new account with $5,000,how much more money will he earn at Charter One over Town Bank after 25 years?

• $1,183.41                fairy wings
• $1,209.79             space suits
• $1,251.63          bubble wrap
• $1,324.10               hula skirts

Exponential General Form Equation