1. Express y = log₄ 5 as an exponential equation.

Select one:

a. 4^y = 5. b. 5^y = 4. c. 4^x = 5y. d. 5^x = 4y

4. If the exponential equation y = 7^x is written in the form x = log_b y , the value of b is

Answer:

6.

The pH of a solution, p(x), can be determined using the function

p(x) = -log x

where x represents the hydrogen ion concentration of the solution in moles/litre.

The pH of a solution that has a hydrogen ion concentration of 0.005 mol/L is

Select one:

a. 1.5 b. 2.0. c. 2.3. d. 2.8

7.

The pH of a solution, p(x), can be determined using the function

p(x)= -logx

wherexrepresents the hydrogen ion concentration of the solution in moles/litre.

Black coffee has a pH of 5, and bleach has a pH of 13. In terms of their hydrogen ion concentrations, how much more acidic is black coffee than bleach?

Select one:

a. 1 000. b. 10 000. c. 100 000. d. 100 000 000

9. The value of y = 4 ln(2), to the nearest hundredth, is

Answer:

10. The sound level of a loud indoor rock concert is 120 dB. The sound level of a quiet radio is 40 dB. How many times louder is the rock concert than the quiet radio?

Select one:

a. 10^8. b. 10^5. c. 10^3. d. 10