The Richter scale converts seismographic readings into numbers for measuring the magnitude of an earthquake according to this function M(x) = log 
, where x0 = 10-3.What is the magnitude of an earthquake whose seismographic reading is 7.6 millimeters at a distance of 100 kilometers from its epicenter?Round the answer to four decimal places.
A. 0.20281
B. 2.0281
C. 0.38808
D. 3.8808
Answer: D
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Use the equation and the corresponding graph for the quadratic function to find what is requested.f(x) = (x - 3)2 - 6
Find the y-intercept.
A. (0, 3) B. (-3, 0) C. (0, 4) D. (3, 0)
Solve. Use interval notation to express the range.The formula C = 2x + 20 represents the estimated future cost of yearly attendance at State University, where C is the cost in thousands of dollars x years after 2010. Use a compound inequality to determine in which years attendance costs will range from 36 to 44 thousand dollars.
A. [2019, 2021] B. [2018, 2022] C. [2017, 2021] D. [2019, 2023]
Solve the problem. Round to the nearest tenth if necessary.A medical clinic has 0.8 L of a medication on hand. How many milliliters are on hand?
A. 8 ml B. 800 ml C. 8000 ml D. 80 ml
Find the number of x-intercepts for the function. f(x) = 5x2 - 3x + 7
A. One B. Two C. None