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1. How many times louder is a 60 dB sound than a 10 dB sound?( show your formula and steps for this problem)
2. How many times more energy is released by magnitude 5 earthquakes than by a magnitude 3 earthquake? (show your formula and steps to the solution of this mathematical question)
When you are 2 meters away from the speakers at a concert, the sound level is 140 db. How far away should you sit to reduce the level to 100 dB? (show your formula and steps to the solution of this problem)
Express the hydrostatic force against one side of the plate as an integral and evaluate it. (Give your answer correct to the nearest whole number.)
jhon, mary,and ali have 17,12 and 10 marbels respectively what is the everage of marbels each of them have?
Quadratic equations may be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each of these methods, when are they appropriate and which method is your preference?
a different smooth structure on r show that u phi given byis a local chart of the topological manifold m r which is
Use the 36 degrees, 72 degrees, 72 degrees isosceles triangle to find the exact value of cos72 degrees
Two balls are drawn (without replacement) from an urn that contains four red balls, five green balls, and seven white balls
A weather satellite is traveling in a circular orbit 9800 miles above the surface of the earth. Find the angle of depression from the television satellite to the horizon. Assume that the radius of the earth is 4000 miles.
One month a shop ordered 95 total units from 3 different suppliers from Toronto, Ott., and Montreal. Costs were: $81, $49, and $57 with a total cost of $5375. The shop ordered the same amount from Ott and Toronto. How many did each order?
The base of an aquarium with volume V = 495 is made of slate and the sides are made of glass. If slate costs five times as much (per unit area) as glass, find the dimensions of the aquarium that minimize the cost of the materials.
Based on exponential growth function how long will it take the world population to reach exactly 7 billion? How about 10 billion? Based on the population how long before it will reach 400 million? and 500 million?
A textbook store sold a combined total of physics and psychology textbooks in a week. The number of physics textbooks sold was two times the number of psychology textbooks sold. How many textbooks of each type were sold?
the speed of an airplane in still air is 283 mph. the plane travels 477 mi against the wind and 1445 mi with the wind in a total time of 18 hrs. what is the speed of the wind?
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