Thread: Multiple choice questions

2. Find the amount accumulated after investing a principal P for t years at an interest rate r. (use r as a decimal-not a %)

P=1,000 t=7 r=9% compounded annually (k=1)

A) $1677.10
B) $1992.56
C) $828.04
D) $1828.04




3. Find the amount accumulated after investing a principal P for t years at an interest rate r. (use r as a decimal-not a %)

P=840 t=5 r=1% compounded continuously

A) $1025.98
B) $124,667.05
C) $1274.19
D) $883.07




4. Suppose the amount of a radioactive element remaining in a sample of 100 milligrams after x years can be described by A(x)=100e^-0.01123x. How much is remaining after 103 years? Round the answer to the nearest hundredth of a milligram.


A) 115.67 mg
B) 0.31 mg
C) 31.45 mg
D) 317.94 mg

Originally Posted by cspan1986

2. Find the amount accumulated after investing a principal P for t years at an interest rate r. (use r as a decimal-not a %)

P=1,000 t=7 r=9% compounded annually (k=1)

A) $1677.10
B) $1992.56
C) $828.04
D) $1828.04




3. Find the amount accumulated after investing a principal P for t years at an interest rate r. (use r as a decimal-not a %)

P=840 t=5 r=1% compounded continuously

A) $1025.98
B) $124,667.05
C) $1274.19
D) $883.07




4. Suppose the amount of a radioactive element remaining in a sample of 100 milligrams after x years can be described by A(x)=100e^-0.01123x. How much is remaining after 103 years? Round the answer to the nearest hundredth of a milligram.


A) 115.67 mg
B) 0.31 mg
C) 31.45 mg
D) 317.94 mg

For 2 and 3 you should have some formula you can plug into.

For 4, plug in x=103 to find the amount remaining.
Good luck!