The drilling of a jackhammer was measured at 132 dB. The sound of whispering was measured at 28dB. Find the ratio of the intensity of the drilling to that of the whispering.

Q: A surveyor, standing 30 ftfrom the base of a building, measures the angle of elevation to thetop of…

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Q: How many seconds will elapse between seeing a lightening and hearing the thunder, if the lightening…

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Q: The State of Illinois Cycle Rider Safety Program requires motorcycle riders to be able to brake from…

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Q: 2. Calculate the sound intensity in watts/m2 of a 65-decibel sound.

A: Given,             65 DBWe have to find out Sound Intensity in watts/m2.

Q: What is the magnitude in the Richter scale of an earthquake that released 10 joules of energy? (5

A: Direct use the formula of Richter Scale and substitute the given values then simplify.

Q: According to the recommended safety ratio of 4:1, how high will a 44-foot ladder reach when placed…

A: Safety ratio is 4:1  means  a = 4x  and  b = x And length of ladder is 44 foot We have to find…

Q: A whisper in a quiet library is about 30 decibels. What decibel level would be recorded by a table…

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Q: It took 14 sec for a mercury thermometerto rise from -19C to 100°C when it was taken from a freezer…

A: Mean value theorem :MVTsuppose fx is a continous function on a closed interval a,band…

Q: The Lookout Mountain Incline Railway, located in Chattanooga, Tennessee, is 4972 ft long and runs up…

A: Given condition shows a right triangle ∆ABC where AC=4972 ft, θ=17∘ find altitude AB we know,…

Q: The Great Earthquake registered a magnitude of 8.5 on the Richter scale. What was the intensity of…

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Q: What is m/DBC ?

A: b is centre of circle ∠DBA=180

Q: A sound measures 42 dB. The intensity of a second sound is four times as great. What is the decibel…

A: Consider I1 be the intensity of the first sound and I2 be the intensity of the second and consider…

Q: A metal at 86°C is placed in an oil bath at 200°C. After 30 minutes, the temperature reached 120°C.…

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Q: On a steep mountain road the elevation dropped at the rate of 9 feet per 60 feet. Using signed​…

A: Here we have to find the rate at which the road dropped per

Q: A car traveling at 48 ft/sec decelerates at a constant 3 feet per second squared. How many feet does…

A: v = u+atu = 48a= -3      [decelerating value]v=0           [complete stop]Hence,t= v-uat= 0-48-3t=…

Q: A sound measures 63 db from 9 m away. How loud is it from 22 m away

A: Solution:GivenA sound measures 63 db from 9m awayTo findHow loud is it from 22m away

Q: Which pair of ratios is not proportional?

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Q: If the systolic pressures of two patients differ by 12 millimeters, by how much would you predict…

A: If the systolic pressures of two patients differ by 12 millimeters, by how much would you predict…

Q: In an electrical circuit, the voltage across a resistor is directly proportional to the current…

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Q: At what rate did the temperature rise from 6 a.m. to 12 p.m.?

A: Given, Temperature versus Time graph of a spring day We have to find, at what rate did the…

Q: to water a lawn adequately, it takes 538 gal of water for every 1000 sq ft. what is the rate in…

A: given : 538 gal of water require for every 1000 sq ft∴ for 1 sq.ft 2381000 gal            ⇒0.538 gal…

Q: at (nxlb) mopoh- Find the average miles per houo Over whole loip? where

A: One way distance=7820 miles  Speed while moving down=782mph Speed while returning =7820 mph  We will…

Q: A deep-dish apple pie, whose internal temperature was 220°F when removed from the oven, was set out…

A: Given: Apple pie's internal temperature=220oF After 15 minutes later pie's internal temperature…

Q: A car traveling at 46 ft/sec decelerates at a constant 7 feet per second per second. How many feet…

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Q: A car traveling at 60 feet/sec decelerates at a constant rate so that it comes to a complete stop…

A: Initial velocity is equals to 60 ft./s

Q: If the line voltage is 115 Vrms, a turns ratio of 5;1 means the rms is closest to. secondary voltage

A: Solution:GivenIf the line voltage is 115 V rms, a turns ration of 5:1means the rms secondary voltage…

Q: If a plane travels from NAIA to Bagasbas Airport at 500 kph and back along the same route at 300…

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Q: A spy plane is cruising at an altitude of 18,250m. If the temperature at this altitude is -75C what…

A: Consider the given question,Given Altitude, H = 18,250 mTemperature, T = -75 degree Celsius = (-75 +…

Q: Hence, use the rounded values of y and w to find x, correct to 1 decimal place.

A: To find the value of x using y and w

Q: by 60 volts. How much amps will be produced? ____________________   Suppose the loudspeaker…

A: We have given  Resistance , R = 8 ohm Voltage , V=60 voltage Using ohm's law V=I R amps I=VR amps…

Q: A wheel has a diameter of 100 centimeters. If the wheel is supporting a cart moving at 45 kilometers…

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Q: A car traveling at 42 ft./sec decelerates at a constant 3 feet per second squared. How many feet…

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Q: The fuel efficiency,  in miles per gallon,  of an American- made car is it discrete or continuous?

A: We have to identify type of variable.

Q: What is the magnitude in the Richter scale of an earthquake that released 100 million joules of…

A: It is given that An earthquake that released 100 million joules of energy

Q: 411. What is the decibel level of a train whistle with intensity 10 watts per square inch?

A: We know that decibel level of sound is B=10log10II0 where I0=1×10-12W/m2 Now, intensity of train…

Q: If one earthquake is 30 times as intense as another, how much larger is its magnitude on the Richter…

A: I have provided solution in step2.

Q: A car traveling on a 2.7° uphill grade has a grade resistance of 120 lb. Determine the weight of the…

A: A car traveling on a 2.7° uphill grade has a grade resistance of 120 lb.   formula used: F=wsinθ The…

Q: What is the decibel level of a sound with intensity 10 5 watts per square inch.

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Q: What is the rate of the current in miles per hour?

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Q: By noon, the temperature in Buffalo had risen by 16 °F. What was the temperature there at noon?

A: We have to answer the questions using the given table.

Q: A 2,792.1 Hz sound has a velocity of 5100 m/s in glass and 5940 m/s in steel. The wavelength (m) of…

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Q: How long will it take to grow 750 to 900 at 12% pa?

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Q: . A thermometer is removed from a room where the temperaiure is 75° F and is taken outside, where…

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Q: What is the intensity level of a lawm mower if the sound has the intensity of 0.00063 W/m^2?

A: Given  Intensity level L = 10 log(I/Io) db I = 0.00063 W/m2 = 63× 10-5 W/m2 Io =  10-12 W/m2

Q: sarah drives 55 mi/h for h hours. which shows the nmber of miles that sarah drove?

A: Speed at which Sara drove is 55 mi/h Time for which Sara drove is h hours.

Q: The energy (in electron-volts) for a photon with a wavelength 260 nm is:

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Q: A whisper in a quiet library is about 30 decibels. What decibel level would be recorded by a table…

A:

Q: A ship is sailling at 5 knots (nautical miles per hourlon

A: Given, Speed of ship: Vs=5knots. Direction of ship: θ=000° speed of wind: Vw=4knots Direction of…

Q: At what rate was the snow falling during the second snowfall? 1 inch every 3 hours 5 inches every 2…

A: Consider the given graph. The y axis represent Snow on the ground in inches. The x axis represent…

Q: how much more intense is an earthquake with a magnitude of 5.4 on the ritcher scale than one with a…

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.