#40 ness who saher alibi help?39. A cup of coffee at a cafe is served at 95°C and lefton the counter. The cafe is air-conditioned with anambient temperature of 20°C. After five minutes,the coffee's temperature is 45°C. Determine howlong before the coffee loses its taste quality; that is, itcools down to the temperature of 22° C.40. In 1986 the Chernobyl nuclear disaster in the SovietUnion contaminated the atmosphere. The buildupof radioactive material in the atmosphere satisfiesthe differential equationdMk.dt(w-)-where M= mass of radioactive material in the at-mosphere after time (in years); k is the rate at whichthe radioactive material is introduced into the atmo-sphere; r is the annual decay rate of the radioactivematerial. Find the solution, M(t), of this differentialequation in terms of k and r.E1. The von Bertalanffy curve was used to examinegrowth patterns in both body length and mass offemale and male polar bears (Ursus maritimus) cap-tured live near Svalbard, Norway (see Figure 6.20).

Name: #40 ness who saher alibi help?39. A cup of coffee at a cafe is served
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Description: #40 ness who saher alibi help?39. A cup of coffee at a cafe is served at 95°C and lefton the counter. The cafe is air-conditioned with anambient temperature of 20°C. After five minutes,the coffee's temperature is 45°C. Determine howlong before the co

dMdt=rkr-M On simplification, we get ⇒dMdt=k-Mr⇒dMdt+rM=k Now comparing with dMdt+PM=Q, we get P=r…

Math

Calculus

0. In 1986 the Chernobyl nuclear disaster in the Soviet Union contaminated the atmosphere. The buildup of radioactive material in the atmosphere satisfies the differential equation d M M =r dt - - where M =mass of radioactive material in the at- mosphere after time (in years); k is the rate at which the radioactive material is introduced into the atmo- sphere;r is the annual decay rate of the radioactive material. Find the solution, M(t), of this differential equation in terms of k and r.

0. In 1986 the Chernobyl nuclear disaster in the Soviet Union contaminated the atmosphere. The buildup of radioactive material in the atmosphere satisfies the differential equation d M M =r dt - - where M =mass of radioactive material in the at- mosphere after time (in years); k is the rate at which the radioactive material is introduced into the atmo- sphere;r is the annual decay rate of the radioactive material. Find the solution, M(t), of this differential equation in terms of k and r.

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

Chapter8: Areas Of Polygons And Circles

Section8.CR: Review Exercises

Problem 40CR: Sue and Daves semicircular driveway is to be resealed, and then flowers are to be planted on either...

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answer above is incomplete
When a cold drink is taken from a refrigerator, its temperature is 5°C. After 25 minutes in a 20°C room its temperature has increased to 10°C.(a) What is the temperature of the drink after 50 minutes?(b) When will its temperature be 15°C?
Detective Colombo was ready to go to bed when his phone rang. He looked at the clock onthe wall, the clock was showing ten past midnight.\Phone calls at this time of night never bring good news", thought Colombo while reaching for thephone.-\We just discovered a body, 458 Oakley drive" - a nervous voice on the other end of the phoneshouted.- \Will be there in 20 minutes." said Colombo while getting dressed.As the detective arrived at the scene, the house was a mess. The victim was discovered on thecouch in the living room. Detective Colombo touched the victim's hand, it still felt pretty warm.Using his portable thermometer the detective took the victim's body temperature, it was 85F.-Please do not touch the thermostat and let it stay at 70F, - he asked the other policemen as theywere arriving at the scene. \Any security cameras in the area?"\Yes," one of the ocers replied,\ there is a camera on the corner of the building. Unfortunately, itdoes not cover the entrance to the house, but…
When a cold drink is taken from a refrigerator, its temperature is 5 ° C. After 25 minutes in a 20 ° C room its temperature has increased to 10 ° C (a) What is the temperature of the drink after 50 minutes? (b) When will its temperature be 15 ° C
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