Solve the problem.The magnitude of an earthquake, measured on the Richter scale, is given by  where I is the amplitude registered on a seismograph located 100 km from the epicenter of the earthquake, and I0 is the amplitude of a certain small size earthquake. Find the Richter scale rating of an earthquake with an amplitude of 107.8 I0.

A. 2.2
B. 17.8
C. 18
D. 7.8


Answer: D

Mathematics

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Identify the unknown amount as the portion, rate, or base.50% of what number is 54?

A. rate B. portion C. base

Mathematics

Provide an appropriate response.Find the special product: (5x - 2y)2

A. 25x2 - 20xy + 4y2 B. 25x2 - 4xy + 4y2 C. 25x2 + 4y2 D. 25x2 - 4y2

Mathematics

Which type of combinatorics problem is represented in the following situation?: How many different lottery tickets is it possible to produce if the lottery involves drawing 6 numbers at random from a hopper containing 54 numbers?

a. Selection b. Partition c. Distribution d. Fundamental Counting Principle

Mathematics

Solve the problem.A conical tank is resting on its apex. The height of the tank is , and the radius of its top is . The tank is full of gasoline weighing  How much work will it take to pump the gasoline to the top? Give your answer to the nearest ft ? lb.

A. 96,981 ft ? lb B. 2969 ft ? lb C. 20,782 ft ? lb D. 9,856,140 ft ? lb

Mathematics