1. calculus

The rate of decay in the mass, M, of a radioactive substance is given by the differential equation dM dt equals negative 1 times k times M, where k is a positive constant. If the initial mass was 100g, then find the expression for the mass, M, at any time

2. calculus

Find the particular solution to y ′ = sin(x) given the general solution is y = C − cos(x) and the initial condition y(pi/2)=1

3. math

Given f(x) > 0 with f ′(x) > 0, and f ′′(x) > 0 for all x in the interval [0, 3] with f(0) = 0.1 and f(3) = 1, the left, right, trapezoidal, and midpoint rule approximations were used to estimate the integral from 0 to 3 of f of x, dx

4. calculus

The temperature of a hard boiled egg varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T minus A, where T is the temperature of the egg, A is the room temperature, and k is a positive constant. If the egg cools from

5. math

Point C and point D are plotted on the graph. Plot points A and B to form rectangle ABDC with an area of 36 square units. Plot point E at (2, 4).

6. english 2

What is brainstorming? using a type of outline for drafting making an illustration or map of a place for ideas jotting down a list of possible ideas for a topic working together in groups to polish a piece of writing

7. College

Three(3) digit numbers can be formed from the digits 0,1,3,5,7 and 8. How many numbers can be formed without repeats. (A) if the 3 digits numbers must be divisible by 5. (b) if the 3 digits number must be a multiple of 2

8. History

Which of the following best describes the Framers’ intentions concerning the relationship between state and federal courts? A.Federal courts were to be the primary courts under the Constitution, hearing all important cases, i.e., felony criminal

9. mathematics

from a point x a boat sails 6 km on a bearing of 038 degrees to a point y.it then sails 7 km from y on a bearing of 067 degrees to a point z.calculate the; a.distance XZ correct to two decimal places b.bearing of Z from X correct to the nearest degree

10. math

The dimensions of a rectangle dining room are 18 feet by 16 feet.If a scale factor of 1/4 is used to make a scale model of the dining room,what is the area of the dining room in the scale model? A.18 square feet B.36 square feet C.48 square feet D.72

11. math

A piece of carpet is 8 feet wide and 12 feet long. The carpet needs to be reduced by a scale factor so that the reduced carpet is 2 feet wide. What is the area of the reduced carpet? 6 square feet 12 square feet 24 square feet 48 square feet

12. Math

A carpenter is assigned the job of expanding a rectangular deck where the width is one-fourth the length. The length of the deck is to be expanded by 10 feet, and the width by 6 feet. If the area of the new rectangular deck is 128 ft^2 larger than the area

13. math

Simon and Jimmy had 167 stamps altogether. Simon gave 4/7 of his stamps to Trina, and Jimmy gave 37 stamps to Trina. Simon and Jimmy had the same number of stamps left. How many stamps did Jimmy have in the beginning? I need you to show me how you did it

14. world history

which of these elements of Indian culture was not adopted in Cambodia? a. Hindu and buddhist coexistence b.a burreocracy dominated by military religious leaders c. architecture d. The caste system my answer B

15. chemistry

calculate the pH. A solution is formed mixing 12.0 mL of .120 M HBr with 22.0mL of .180 M HCl

16. maths

A speed boat at the shore wants to overtake a sail boat that is 3 km out at sea. If the sail boat is travelling away from the shore at 1.5km/hr, how fast should the speed boat travel to overtake the sail boat in 5 minutes fro the shore?

17. Math

You currently lease scanning equipment at a cost of \$1,500 per quarter and two copy machines at \$120 each per month. a. What will you need to budget annually for this leased equipment?

18. math

A scale model of a rectangular building lot measures 7 feet by 5 feet. If the actual house will be built using a scale factor of 12, what is the area of the actual building lot? 35 square feet 420 square feet 840 square feet 5,040 square feet

19. MACROECONOMICS

6.(Money Creation) Show how each of the following would initially affects a banks assets and liabilities.

20. Geometry

Determine whether a tangent line is shown in the diagram, for AB = 7, OB = 3.75, and AO = 8. Explain your reasoning. (The figure is not drawn to scale.)

21. Personal Finance

Assume that you are 23 years old and that you place \$3,000 year-end deposits each year into a stock index fund that earns an average of 9.5% per year for the next 17 years. how much money will be in the account at the end of 17 years.

22. maths

A man swimming in a river finds that it takes him thrice the time to swim 2 km upstream as it takes him to swim bac. If the river flows at the rate of 1.5 km/hr, find the swimming speed of the man in still water.

23. maths

sum of ages of mother and daughter is 32 years.Daughter is a year old.In how many years will mother be 4 times daughters age(use one variable only)

24. math

A model of a rectangular patio at a landscaping business will be enlarged by a scale factor of 2 when it is installed in a customer’s back yard. The area of the new enlarged patio will be 160 square feet. What is the area of the landscaper’s model?

25. world history

the major emphasis of Sufism was a. rejection of shiiite practices b. unity against Hindus c rejection of worldly pleasures d repressing secularism my answer C

26. maths

an electronic device makes a beep after every 60 seconds,another device makes a beep after every 62 seconds.they beep together at 10 am.the time when they will next make a veep together at the earliest is?

27. psychology

* Does life really start in prenatal development? * Who are the actual individuals involved in the prenatal stage of development?

28. History

Presidential communications are: • Presumptively privileged from compelled disclosure. • Completely confidential. • Absolutely privileged from compelled disclosure. • Not privileged from compelled disclosure whatsoever

29. French SraJMcGin

Faites 5 phrases en donnant des solutions possibles aux guerres, faminines, etc. UTILISEZ SEULEMENT LE SUBJONCTIF! ON DOIT AVOIR UN EXEMPLE DU PRONOM "ON" COMME LE PRONOM SUJET! I have to write 5 phrases using the subjonctive, on solutions for war, poverty

30. math

The area of the scale model of a playground is 6 square yards. The scale model is enlarged by a scale factor of 3 to create the actual playground. What is the area of the actual playground?

31. math

The scale drawing of a rectangular room will be enlarged by a scale factor of 4 to create the actual room. The actual area of the room will be 150 square feet. What expression finds the area of the scale drawing?

32. Math

1÷5 (45y+20)+3÷4 (12y=24)=19 Find solution set (9y=14)+(9y=18)=19 18y = 33÷8

33. world history

where was Srivijaya centered? a.Cambodia B. Burma C. Sumatra D.The Malay peninsula MY answer C which of these characterized Baghdad under the Abbasid's? A. small, Arab, agricultural b New ,cosmopolitan, multi ethnic c. small, commercial, Persian d. large,

34. College Education

What was the role of school counselors during the Agrarian age, the Industrial age and the Knowledge age. Or were there counselors during this time period?

35. algebra 2

If an observer is 200 ft from a building and the angle of elevationto the top of a building is 60°,what is the height of the building?

36. maths

A dealer wants to mix 20 kg of product A costing rupees 2.40 per kg with product B, worth rupees 3.30 per kg to produce a mixture worth rupees 2.70 per kg. How many kilograms of product B should he use?

37. math

How we can write 17 - 07-2015 in 5 letters

38. asibemunye

what are welfare payment or consumer subsidy

39. Algebra 2

Can someone help me with the following please What property is the following: a(b + 0) additive inverse property - this was confirmed from previous equation = a x b + a x 0 Distributive. (I think) = a x b + 0. Multiplication property of zero (I think) = a

40. algebra

fee at fair is \$2 per child and \$4 per adult. on a certain day 2000 people enter and \$6000 is profited. How many child and adults went to the fair.

after seeing the movie "The Day of the jackal",_______________. (a)the book was read by many people. (b)the book made many people want to read it. (c)many people wanted to read the book (d)the reading of the book interested many people.

42. early childhood education

24. What is the first step in planning an early childhood education environment? A. Deciding how the environment will reflect program goals and values B. Obtaining adequate liability insurance C. Planning how the environment will match children's

43. critical thinking

In February 1992, a representative of the Catholic Church in Puerto Rico gave a radio interview (broadcast on National Public Radio) in which he said that the Church was against the use of condoms. Even though the rate of AIDS infection in Puerto Rico is

44. maths

The sum of digits of a 2 digit number is 7, If digits are interchanged the new number formed is 3 less than four times of original number. ( use 2 variables)

45. english teachers?

are there any english teachers on here at this time?

46. math

How much is the 25 of \$42,500

47. maths

i had 30 candies on monday. on wednesday, i have 19. bekka took some from me on tuesday. how much did she take?

48. science

How food travels through various compartments

49. physics

A stone is dropped from a height of 4.5m.What will be the distance travelled by it during the last second of its fall?

50. International studies

Whatdoes these phrase means les asiatiques sont a paris pour les boutiques

51. english

Whats another way to say "no human rights.." My sentence is starting with "In order to solve.."

52. Criminal behaviour

Choose three criminal acts. Describe and discuss how each of the three key sociological perspectives in the Schmalleger text explains the commission of the criminal acts. Each criminal act must have been disposed of ( by conviction or acquittal of the

53. media

Can the source language of the film have an impact on its diffusion and its distribution?

54. English

1. In at least three sentences, locate and explain the effectiveness of three rhetorical devices. ----------------------- Pearson’s address on the inauguration of the national flag of Canada: On September 5, 1945 an Order-in-Council was passed declaring