2) A body temperature of 50 °F is placed in an oven whose temperature is kept at 150 °F. If after 10min, the temperature of the body is 75 °F. Find the time required for the body to reach 100 °F.

Q: 2. A train traveling at 30 miles per hour reaches a tunnel which is nine times as long as the train.…

A:

Q: If the first swing of this pendulum travels for 42 cm and its successive swing decreases by 20%,…

A: Distance travelled in second swing is 80 percent of the first swing ( As it decreases by 20…

Q: Suppose that a colony of bacteria starts with 1 bacterium and doubles in number every half hour. How…

A: To determine the number bacteria at the end of 24 hours.

Q: A snail is at the bottom of 10-meter well. Each day it crawls up 3 meters, but at night, it slips…

A: The snail crawls up 3 meters at day, but slips down 2 meters at night. So gradually, everyday it is…

Q: A water tank can be emptied by using one pump for 5 hours. A second, smaller pump can empty the tank…

A: Given: A water tank can be emptied by using one pump for 5 hours. A second smaller pump can empty…

Q: 1. Two planes leave at the same time. One flies west at 300km/hr. the other flies east at 450 km/hr.…

A: Speed of plane 1:  s1 = 300 km/hr Speed of plane 2:  s2 = 450 km/hr

Q: The number of water lilies at the lake is doubling each day. If they covered the whole lake in 24…

A: Given: The number of water lilies at the lake is doubling each day The whole lake is covered in 24…

Q: As part of a training program for the Boston Marathon, a runner wants to build endurance by running…

A:

Q: In a lab experiment, 4600 bacteria are placed in a petri dish. The conditions are such that the…

A:

Q: 4.) The area of a triangle varies jointly as its base and height. A triangle with a base of 9 cm and…

A: Concept:

Q: suppose the yo-yo string is 28 inches and it completes one revolution in 3 seconds. If the closest…

A:

Q: The number of participants in the orientation program doubles in size each day and it covers an…

A: Topic = Algebra

Q: Consider an object in a surrounding with constant temperature of 25°C. If the emperature of the…

A:

Q: A metal sphere cools from 60°C to 50°C in 5 minutes. How much more time (in minutes) will it take to…

A:

Q: Suppose you are a pharmacist and a customer asks you thefollowing question. His child is to receive…

A: Given: Total nausea medicine received by child=13.5 mlTotal time period=54 hours To Find: The amount…

Q: A squirrel starts the winter with a full supply of food stored. If, cach week, the squirrel eats 12%…

A: A squirrel starts the winter with a full supply of food stored.every week, the squirrel eats 12% of…

Q: If the raindrop is initially 500 m above the ground, how long does it take to fall? Find the

A:

Q: Your desktop computer uses between 100 - 250 watts when in use (depending on the components) and…

A: 1 day= 24 hours 365 days= 365*24=8760 hours When the computer is never turned on then it consumes 3…

Q: 4. A job is 333 % completed in 15 minutes. At this rate, how many minutes will it take to complete…

A:

Q: Mitzi drops a ball from a height of 10 m and notices that on each bounce the ball returns to about…

A: Definition used -                               Sum of the infinite geometric series - ( When…

Q: A certain type of glass is such that a slab 1" thick absorbs one-quarter of the light which starts…

A:

Q: Car A is 40 km east of Car B and begins moving west at 40 km/h. At the same moment, Car B begins to…

A: Answer is in below steps.

Q: A man travels in a motorized banca at rate of 12 kph from his barrio to the poblacion and come back…

A:

Q: A is thrice as good a workman as B and threfore is able to finish a job in 60 days less than B.…

A:

Q: A rocket is launched with an initial upward velocity of 320 feet per second from an Initial height…

A: If the initial upward velocity and initial height of an object is given then the height function of…

Q: 2. A motorist travels for 20km at one speed, and then increased her speed by 20 kph for next 30 km.…

A:

Q: A rubber ball is made to fall from a height of 70 feet and is observed to rebound 3/4 of the…

A: The sum, S, of the infinite geometric series, a+ar+ar2+ar3+⋯ is defined as S=a1-r. Here a is the…

Q: If paper napkin 0.10 inch thick could be folded so that it was half as large but twice as thick,…

A: paper napkin 0.10 inch thick could be folded so that it was half as large but twice as thick,…

Q: A ball is dropped from a height of 50 meters. If each bounce brings it to 90% of its previous…

A:

Q: A body cools from 75°C to 70°C in 2 minutes. What will additional time (in minutes) it takes to cool…

A: Topic:  Newton's Law of cooling using application of calculus

Q: In a lab experiment, 510 bacteria are placed in a petri dish. The conditions are such that the…

A: We are given that the initial amount of bacteria at t=0 is b0=510 and that the bacteria doubles…

Q: A worker bee flies of a mile in of an hour. At this rate, how far can the bee fly in 1 hour?

A: given that a worker bee flies 58 of a mile in 116  of an hour find out how far the bee can fly in an…

Q: The present time is 9 AM .What time will be 3600 seconds from now?

A: Given that the present time is 9 AM . We want to find the time after 3600 seconds.

Q: A certain substance can cool itself from 103°C to 70°C in 15minutes. If the air’s temperature is…

A:

Q: If the air is maintained at 15oC and the temperature of the body drops from 70oC to 40oC in 10…

A:

Q: A ball is thrown vertically into the air at a velocity of 180 ft/sec. After 5 seconds, another ball…

A:

Q: As dry air moves upward, it expands and, in so doing, cools at a rate of about 1o C for each…

A:

Q: Initially, a pendulum swings through an arc of 2 meters. On each successive swing, the length of arc…

A:

Q: the minute hand of a clock is 15 mm long and the hour hand is 12 mm. How fast is the distance…

A:

Q: Suppose that a corpse is discovered at 10 p.m. and its temperature is determined to be 85°F. Two…

A: Given that, Suppose that a corpse is discovered at 10 p.m. and its temperature is determined to be…

Q: I = e(k-1)t (Infections per day)

A: This is question of counting and differentiation.

Q: A truck moving continuously, averages 52.5 mph for 6.75 hr. how far does it travel during this time?

A:

Q: A ball is dropped from a height of 15 ft and bounces 77 % of its previous height on each bounce. How…

A:

Q: A frog is at the bottom of a ten feet well. Each day it crawls 2 feet and loses its grip and slides…

A: See below

Q: A life raft, set adrift from a sinking ship 150 miles offshore, travels directly toward a Coast…

A: Time , distance and speed is related using a formula time=distancespeed .At the same time , both the…

Q: If a toy rocket is launched vertically upward from ground level with an initial velocity of 128 feet…

A: applying the concet of projectile motion, using, height 'h' after t seconds is given by the…

Q: If the air is maintained at 15°C and the temperature of the body drops from 70°C to 40°C in 10…

A:

Q: (a) The value of a car depreciates by 25% in a year. What will a car, currently priced at $43,000,…

A: We will find the price of car after one year