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
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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
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
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
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