College Algebra - Week 11
Homework
Check each answer individually. Use the hint if you get stuck, then ask the tutor.
Problem 1 · easy
Evaluate: 2^5
Problem 2 · easy
Evaluate: (1/3)^3
Problem 3 · easy
Evaluate: log_2(64)
Problem 4 · easy
Evaluate: log_3(1/27)
Problem 5 · easy
Evaluate: log(100)
Problem 6 · easy
Evaluate: ln(e^4)
Problem 7 · easy
Convert to log form: 4^3 = 64
Problem 8 · easy
Convert to exponential form: log_6(36) = 2
Problem 9 · medium
Expand: log(x^3 * y^2)
Problem 10 · medium
Expand: ln(sqrt(x)/y^2)
Problem 11 · medium
Condense: 2*log(x) + log(y) - 3*log(z)
Problem 12 · medium
Condense: ln(3) + 2*ln(x) - ln(5)
Problem 13 · easy
Solve: 3^x = 81
Problem 14 · easy
Solve: 2^(x+1) = 32
Problem 15 · medium
Solve: 5^x = 12. Round to 3 decimal places.
Problem 16 · medium
Solve: e^(2x) = 7. Round to 3 decimal places.
Problem 17 · medium
Solve: log_3(x + 4) = 3
Problem 18 · medium
Solve: log(5x - 1) = 2
Problem 19 · challenge
Solve: ln(x) + ln(x + 2) = ln(8)
Problem 20 · challenge
$2000 invested at 5% compounded continuously. How long to reach $3000? Round to 2 decimal places.
Problem 21 · easy
Find log_7(49).
Problem 22 · medium
Use the change of base formula to find log_4(20). Round to 3 decimal places.
Problem 23 · challenge
Solve: log_2(x) - log_2(x-1) = 1
Problem 24 · medium
Solve: 4^x = 8
Problem 25 · medium
A radioactive substance has a half-life of 10 years. What fraction remains after 30 years?