Tell if the square root is rational, irrational, or not a real number. If the square root is rational, find the exact value; if the square root is irrational, write the approximative value rounded to 2 decimal places.
A. rational, 8
B. rational, -8 and 8
C. irrational, 8.06
D. not a real number
Answer: D
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The following data show the population N, in thousands, and the average driving time D, in minutes, of residents traveling to work. City Los Angeles Pittsburgh Washington Nashville Tallahassee N 6,560 1,855 1,870 367 48 D 16.8 12.8 14.3 10.2 8? A: Use power regression to model the driving time as a function of the population. Use two digits of accuracy for the coefficient and for the power.B: Plot the data along with the power model you found in part A.C: According to the power model, if the population is increased by 15%, how is the driving time affected? Express your answer in terms of a percentage. Round your answer to two decimal places.
What will be an ideal response?
Solve:
j18 ÄÄÄ j6 a. j9 b. j/3 c. j3 d. -3 e. 3
Write the number in scientific notation.0.000043511
A. 4.3511 ± 10-4 B. 4.3511 × 10-5 C. 4.3511 × 104 D. 4.3511 × 105
Solve the problem.If x is the hydrogen ion concentration of a sample of water, then the pH of that water sample is 
If the pH of the water from one lake is 5.2 and the pH of the water from a second lake is 6.6, how many times greater is the hydrogen ion concentration of the second lake than the hydrogen ion concentration of the first lake? Round your answer to the nearest hundredth.
A. 18.59 B. 25.12 C. 6.14 D. 0.04