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How many times louder is a 60 decibal sound than a 20 decibal sound? 2) How many times more energy is released by a magnitude 6 earthquake than by a a magnitude 2 earthquake? 3) When you are 2 meters away from the speakers at a concert, the sound level is 130 decibels. How far away should you sit to reduce the level to 110 decibels? Please give step by step instructions on how to reach these answers. Thank you
The percent concentration of a drug in the bloodstream x hours after administered is given by k(t)=t/(t^2+9). On what time interval is the concentration of the drug increasing?
After how many seconds will the stone hit the ground? Round to the nearest hundredth's place; include units in your answer.
What alternative would be chosen according to expected value?
Eleven customers at a supermarket are asked independently if they use brand X laundry soap. In general, 25% of the population use this brand. What is the probability that among the eleven, more than two people use brand X? (Round your answer to 4 ..
A four-wheel-drive truck is purchased for $21,900 and a down payment of $2,100 is made. The balance is financed for 3 years at an annual interest rate of 8%. Find the monthly car payment. Use the Monthly Payment Table. Round to the nearest cent.
a) write a system of equations to model this problem b). graph this system and use the graph to estimate how much was invested in each fund?
Find the function representing the demand p(x) , where x is the number of the television sets sold per week and p(x) is the corresponding price.
How are they interpreted in terms of the original problem? Are the results reasonable? If not, what are the failings of the model that led to poor results?
A shipment of 120 computer cases that contains 5 defective cases was sent to an assembly plant. The quality control manager at the assembly plant randomly selects 5 cases and inspects them. What is the probability exactly one case is defective?
the speed s of blood that is r centimeters from the center of an artery is given below where c is a constant r is the
A windshield wiper is 18 inches long and has a blade 12 inches long. If the wiper sweeps through an angle of 130 degree, how large an area does the wiper blade clean? Round your answer to the nearest square inch.
A 23-ft ladder is leaning against a building. If the base of the ladder is 6 ft from the base of the building, what is the angle of elevation of the ladder? How high does the ladder reach on the building?
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