A certain metal has a temperature of 80°C and is placed in a room with a temperature of 20°C. After 20 minutes, the temperature of the metal is now 50°C. How long will it take the metal to reach a temperature of 40°C? O 36.8 min O 31.7 min O 28.5 min O 34.5 min

Q: roblem 5. A cup of coffee has temperature of 200 degrees Fahrenheit and is placed in a room that has…

A: Given a cup of coffee has temperature of 200 degrees Fahrenheit and is placed in a room that has a…

Q: A fisherman can row upstream at 1 mph and downstream at 4 mph. He started rowing upstream until he…

A:

Q: A ball is thrown into the air with an initial velocity of 64 feet per second from a height of 192…

A: to solve this question, we use the concept of projectile.

Q: A man is 32 years older than his son. Ten years ago he was three times as old as his son. Find the…

A:

Q: A body at a temperature 0 degrees Fahrenheit is placed in a room temperature is kept at 100 degrees…

A: Given query is to find the time required to reach the temp to 50° Fahrenheit.

Q: In May of​ 2008, an earthquake measuring 6.3 on the Richter scale struck near the east coast of a…

A:

Q: A thermometer is taken from a room where the temperature is 19°C to the outdoors, where the…

A: We have to solve the given problem.

Q: mariah walks 6 miles per hour bobby walks 4,400 yard in half-hour given that 1 mile = 1,760 how much…

A: Given: Mariah speed=6 miles per hour, bobby speed =440012yardhour=8800 yards per hour we know that,…

Q: A ten-digit number leaves a remainder of 2 when divided by 5. The units digit of that number is O a.…

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Q: Tourists stop at an information desk at a rate of one every 15 minutes, and answering their…

A: Given: Tourists stop at an information desk at a rate of one every 15 minutes, and answering their…

Q: An air traffic controller is tracking two planes. To start, Plane A is at an altitude of 4500 feet…

A: NOTE: Refresh your page if you can't see any equations. . the initial height of plane A is 4500 feet…

Q: A metallurgist has one alloy containing 23% titanium and another containing 51% titanium. How many…

A: Given alloys are  in the following proportions of titanium:Titanium % Alloy 1:23% Alloy 2 :51%…

Q: When a car's tire pressure is 30 pounds per square inch (psi), it averages 20.6 mpg of gasoline. If…

A: A car's tire pressure is 30 pounds per square inch (psi), it averages 20.6 mpg of gasoline. If the…

Q: A star called 61 Cygni is about 11 light years away from Earth. How long would it take to reach 61…

A: Given, a star called 61 Cygni is about 11 light years away from Earth.

Q: An air traffic controller is tracking two planes. To start, Plane A is at an altitude of 2070 feet…

A: topic  -  basic math calculation

Q: population of a city decreases by 1.2% per year. If the years population is 177,000 what will next…

A: Given query is to find the population of the city.

Q: A car is purchased for  $12,000. Each year it loses 25% of its value. After how many years will the…

A: We can use fellowing formula to solve the problem A(t) = A0(1-r)t

Q: In a certain​ skyscraper, the elevators whisk you to a restaurant in the skyscraper at a speed of…

A:

Q: Pat and Chris have the same birthday. Pat is twice as old as Chris was when Pat was as old as Chris…

A:

Q: rturo is 41 years older. Ariana is 15 years old.how many years until Arturo'sage is 2times Ariana's…

A: Follow next step

Q: An experienced roofer can roof a house in 26 hours. A beginner needs 39 hours to do the same job.…

A: Time taken by experience roofer to complete roof is 26 hrs. Time taken by beginner to complete a…

Q: Left on together, the cold and hot water faucets of a certain bathtub take 4 minutes to fill the…

A: Let Rate of water from cold and hot water faucets are Cr and Hr (in volume/min) respectively. Time…

Q: If it takes Jason 8 hours to build a shed, how much of the shed can he build per hour? * O 1/8 O 1/2…

A:

Q: You go to the doctor and he gives you 15 milligrams of radioactive dye. After 16 minutes, 5…

A: I am attaching image so that you understand each and every step.

Q: You go to the doctor and he gives you 14 milligrams of radioactive dye. After 20 minutes, 6…

A:

Q: A certain cake recipe is to be baked at a temperature of at least 360 degree Fahrenheit, but not…

A: 360°F<Temp<450°F Change this range to celsius.

Q: According to the National Coffee Association, the best serving temperature of coffee is between 82°C…

A: Given temperature  of coffee is equals to 84°C and after five minute temperature of coffee is 70°C

Q: A pool has two pipes, one that pours water into the pool, and one that drains water from the pool.…

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Q: Alex's printer can print 8 photos in 12 minutes. Khalil's printer can print 24 photos in 1 hour.…

A: ⁎  Alex's printer can print,       8 photos →12 minutes   —How much time it will take for…

Q: Peter and Paul working together can finish painting a home in 6 days. Peter working alone, can…

A:

Q: Two automobiles start together at the same place and travel along the same route. The first averages…

A: Distance = Speed × Time d = ut

Q: The price of a car depreciates by 25% each year. Find the price of a car after 5 years if it is…

A: The present value of the car is 37,000 OMR. It is given that the price of the car depreciates 25%…

Q: A car is purchased for $39,000. Each year it loses 20% of its value. After how many years will the…

A: A=P1-rtP is the initial valueA is the value after t yearsr is the rate of depreciation

Q: . Haby is four times as old as Kenneth and Haby is 36 years older than Kenneth. How old is Haby?

A: Linear equations.

Q: Jessica and Louise began to read the same book on Friday. Jessica reads 11 pages a day while Louise…

A:

Q: Four grade levels need equal time for indoor recess, and the gym is available for three hours. a.…

A: This question is based on unitary method.

Q: It is currently 7;00 pm .What time in amp or pm will be in 1000 hours

A:

Q: A new car lists for $17,000 and depreciates by 35% per year. Find its value after the following…

A: To find the future value of a depreciating product we use this formula A=P1+r100t Where, A= future…

Q: A ten-digit number leaves a remainder of 2 when divided by 5. The units digit of that number is O a.…

A: Given : 10 digit number leaves a remainder of 2 when divided by 5

Q: According to the National Coffee Association, the best serving temperature of coffee is between 82°C…

A:

Q: well is 22 feet deep. A snail at the bottom climbs up 4 feet each day and slips back down 2 feet…

A: We will find the number of days.

Q: The drive from the Rome to Pompeii is 149 miles on Italy’s Autostrada. It takes 2 hours 28 minutes…

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Q: A seagull can dive 45 meters below the surface of the water to reach a fish. It dives 11% of the…

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Q: Devaughn is 8 years older than Sydney. The sum of their ages is 100. What is the Sydney’s age

A: We can solve this question as below

Q: A car is purchased for $42,000. Each year it loses 30% of its value. After how many years will the…

A: This question can be solved using the concept of compounded depreciation.

Q: In May of​ 2008, an earthquake measuring 6.2 on the Richter scale struck near the east coast of a…

A:

Q: A ball is thrown into the air with an initial velocity of 32 feet per second from a height of 128…

A:

Q: The student's current GPA is 3.24 and is on a quarter system (four quarters total). If the student…

A: Suppose Total duration of course=4 years Suppose the student is in 2nd year. After first year his…

Q: A researcher records the following times (in seconds) that it took a group of students to complete…

A: Given, The  values for standard normal : mean = M = 18 standard deviation = SD = 2 probability =…