# shane

1. ## Calculus

Suppose the population of a colony of ants grows at the rate: P’(x) = 1 + 5/sqroot(t+1) If there are 250 ants after 120 hours, what was the population at t=0?
2. ## Calculus

Suppose the annual revenue for a company between 2000 and 2005 is approximated by R(t)=18t^2+4t+3, where t=0 represents the year 2000.(a)Find the Average Value of R(t) between t=1and t=6. (b)Find the Average Rate of Change of R(t) between t=1 and t=6.
3. ## algebra

Last year, Hans deposited \$3000 into an account that paid 5% interest per year and \$7000 into an account that paid 4% interest per year. No withdrawals were made from the accounts
4. ## math and social networking

what could I use 39000 KB worth of data on in about six minutes of time on my s7 edge cell phone
5. ## Math

Ethel collects animal stickers.She has 30 cat stickers,15 horse stickers,19 dog stickers and 11 rabbit stickers. One third of the horse stickers are round and the rest are square. One fifth of the cat stickers are square and the rest are round. All the dog
6. ## Pre-Calculus

a ferris wheel is elevated 1 meter above ground. When car reaches the highest point of the Ferris wheel, it's altitude from ground level is 31 metres. How far away from the center, horizontally, is the car when it is at an altitude of 25 meters?
7. ## Cruz

A ferris wheel is elevated 1 meter above ground. When car reaches the highest point of the ferris wheel it's altitude from ground level is 31 meters. How far away from the center,horizontally, is the car it is at an altitude of 25 meters?
8. ## statistics

A music industry researcher wants to estimate, with a 90% confidence level, the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year. Previous studies show that 21% of those people (21 to 35 year olds) interviewed go
9. ## math

In a bag there are 3 green apples,5 yellow apples,7 green pears and 2 yellow pears,Simon randomly is taking fruit out of the bag by one by one. How many fruits must he take out in order to be certain that he has at least one apple and one pear of the same
10. ## Physics

A 5.20 g pellet is shot horizontally from a BB gun at a speed of 29.1 m/s into a 20.8 g wooden block. The wooden block is attached to a spring and lies on a frictionless table. If the collision is inelastic and the spring constant k = 22.0 N/m, what is the
11. ## English

What are two themes in Perseus Adventures? Reading the book but really don't understand the question
12. ## Algebra

The sum of 3 consecutive odd numbers is 63. What is the smallest of these numbers
13. ## Global History

Describe in 7 sentences the significant of each individual. 1. Aryans 2. Asoka 3. Brahmins 4. Confucius 5. Laozi 6. Shi Huangdi 7. Siddhartha Guatama 8. Untouchables 9. Wudi I believe the were all famous rulers but that is all I know
14. ## Algebra

The difference between twice a number and a number that is 5 more than 3. Write an equation that could be used to find the value of the number n, and explain how you arrived at.at your choice
15. ## Health

Identify and define the causes of mental disorders
16. ## Algebra

A rectangle has dimensions in feet as shown in the figure it is 2x +5 And one side is 8. I need to write an expression for the area of the rectangle. B. Find the area of the rectangle, in sq.ft. if x=3 C. Find the value of x if the area of the rectangle is
17. ## Math

An object with initial velocity of 20 m/s accelerates uniformly at 5 m/s in the direction of its motion for a distance of 10 m. What is the final velocity of the object?
18. ## government

We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness. — That to secure these rights, Governments
19. ## Calculus

Estimate the area under the curve f(x) = x2 + 1 from x = 0 to x = 6 by using three circumscribed (over the curve) rectangles. Answer to the nearest integer.
20. ## Physics

A piece of cobalt has a mass of 41 g and is initially electrically neutral. It is then charged with q = +0.6 µC. (a) How many electrons were removed from the piece of cobalt in the charging process (in electron) (b) What fraction of the total number of
21. ## Physics

Determine the magnitude of the force between an electric dipole with a dipole moment of 2 ✕ 10-29 C m and an electron. The electron is positioned r = 25nm from the centre of the dipole, along the dipole axis. Hint: Assume that r >> d, with d the charge
22. ## physics

An object in equilibrium has three forces exerted on it. A 25 N force acts at 90 from the x-axis and a 48 N force acts at 60. What are the magnitude and direction of the third force
23. ## Math algebra

The radiator in a car is filled with a solution of 60% antifreeze and 40% water. The manufacturer of the the antifreeze suggests that, for summer diving, optimal cooling of the engine is obtained with only 50% antifreeze. If the capacity of the radiator is
24. ## Math

The radiator in a car is filled with a solution of 60% antifreeze and 40% water. The manufacturer of the the antifreeze suggests that, for summer diving, optimal cooling of the engine is obtained with only 50% antifreeze. If the capacity of the radiator is
25. ## Math

Two cars leave the same town and travel in opposite directions. At the end of 8 hours, the cars are 896 miles apart. Find the rate of each car if the rate of one car is 4 mi/hr more than the rate of the other.
26. ## Math

Gab and Van can mow the lawn in 40 minutes if they work together. If Gab works twice as fast as Van, how long does it take Gab to mow the lawn alone ?
27. ## Thermodynamics

Help me please...! take home quiz >.< A 1Kg of Water at 80 degree Celsius is added to 0.8Kg of water at 20 degree Celsius find the change in entropy.?
28. ## Thermodynamics

Can I have any energy transfer as heat transfer that is 100% available? Explain with equation
29. ## basic electronics

3 resistor in parallel have an equivalent resistance of 1000 ohms. If R2 is twice the value of R3 and trice the value of R1, what is the value of R1,R2 and R3? Please show me the sol'n. n_n
30. ## accounting

As of January 1 of the current year, the Grackle Company had accounts receivables of \$50,000. The sales for January, February, and March of 2012 were as follows: \$120,000, \$140,000 and \$150,000. 20% of each month’s sales are for cash. Of the remaining
31. ## History!!!

What does this poll most suggest about U.S. citizens? a.) they belive that higher taxes are worth the cost and benefits b.) they think that most government programs have little value c.) they prefer fewer public goods and services over higher personal
32. ## History

What is one certain long-term cost of adding to national debt? a.) Americans in the future must have fewer public services b.) Americans in the future will not vote in elections c.) Americans in the future will not enjoy the benefits of the program d.)
33. ## Physics

Let 70.0 J of heat be added to a particular ideal gas. As a result, its volume changes from 65.0 cm3 to 169.0 cm3 while the pressure remains constant at 1.7 atm. By how much did the internal energy of the gas change?
34. ## Physics

An engineer has an odd-shaped object of mass 16 kg and needs to find its rotational inertia about an axis through its center of mass. The object is supported on a wire along the desired axis. The wire has a torsion constant κ = 0.4 N· m. If this torsion
35. ## science

What is the mass of air in a room meauring 30 cubic meters if the density of air is 1.3kg per cubic meter?

37. ## physics

A 2.40 kg mess kit sliding on a frictionless surface explodes into two 1.20 kg parts: 3.78 m/s, due north, and 5.28 m/s, 32.8° north of east. What is the original speed of the mess kit?
38. ## Math

Frank teacher was teaching the class about fractions. She posted the fractions 1/7 and 3/9 on the board. Frank was supposed to answer what the least common multiple of the two fractions was. What did he answer? Help
39. ## Math

There are two fractions that are given. The two fractions are 3/12 and 7/12.what answer so you come up with if you were to add these two fractions together? Would my answer be 10/12.
40. ## Chemistry

I'm stumped 4ko2 + 2co2 ----2k2co3 + 3o2 What mass of k02 in grams is required to react with 8.90 l at 22.0 c and 767 mm hg? Please help thank you
41. ## Math

Prove the identity: sec^4x - tan^4x = 1+2tan^2x
42. ## chemistry

in HNO3 titration, you add few drops of phenolphthalein indicator to 50.0 mL of acid in a flask. you quickly add 20.00 mL of 0.0547 M NaOH but overshoot the end point, and the solutions turn deep pink. instead of starting over, you add 30.00 mL of acid,
43. ## chemistry

A small quantity of hydrochloric acid and a large quantity of limestone chips (CaCO3) are reacted on a beaker, which was placed on the pan of a balance. The mass of the beaker and its contents were recorded every half minute. (a) Write a chemical equation
44. ## Geometry

If EF= 10x+12, FG=14, and EG= 136, what is the value of x?
45. ## chemistry

For the electrolysis of molten potassium bromide: (a) write the equation for the reaction at cathode. (b) write the equation for the reaction at anode. (c) write the equation for the overall reaction.
46. ## chemistry

For the electrolysis of molten potassium bromide: Write the equation for the overall reaction.
47. ## chemistry

In the electrolytic refining of copper, write equation for the reaction of the impure copper.
48. ## chemistry

Write the anodic reaction for the electrolysis of concentrated zinc chloride solution. (a) Using plantium electrodes. (b) Using zinc electrodes
49. ## chemistry

Please I need help. Many,but not all, compounds are made up of positive and negative ions. Three positive ions A^+, B^2+ and C^3+ could form a total of six different compounds with negative ions, Y^2- and Z^3-. Derive the formulae for six compounds and
50. ## chemistry

How many moles of atoms are there in 32g of sulfur?
51. ## chemistry

Calculate the molarity of sulfuric acid if 25.00 mL of 0.095 mol L NAOH reacts with 26.45 mL of the acid.
52. ## chemistry

How many grams are there in 2.5 moles of CuSO4.5H2O?
53. ## chemistry

A 25 mL solution of nitric acid was placed in a flask and a few drops of phenolphthalein were added. Dilute sodium hydroxide was added util the indicator changed colour. It was found that 28 mL of the alkali was used. (a) What colour was the solution in
54. ## maths

A parallelogram has two adjacent sides of length 4cm and 6cm reapectively. If the included angle measures 52 degrees, find the area of the parallelogram.
55. ## maths

John wishes to determine the height of a flagpole. He takes a sighting of the top of the flagpole from point P. He then moves further away from the flagpole by 20 metres to point Q and takes a second sighting. Given the angle Q is 28 degrees and angle P is
56. ## maths

An aircraft dropped a box of emergency supplies to a group of trampers. The height of the box above the ground, h, at time, t is given by the formula; h = 520 - 5t^2, where h is in metres and t is in seconds. Find how long it takes for the box to fall to
57. ## maths

Please I need help..how can I solve this guadratic equation?? 520 - 5t^2 = 0
58. ## maths

Solve this equation by completing squares and then check the solution.. x = 21/x-4
59. ## maths

a)Express y = 2 (x - 1) (x - 5) in the form y = ax^2 + bx + c. b) From the above quadratic equation calculate the following: I) x and y intercepts II) Coordinate of the turning point III) Is the graph a maximum or minimum turning point?
60. ## maths

An aircraft dropped a box of emergency supplies to a group of trampers. The height of the box above the ground, h, at time, t, is given by the formula: h = 520 - 5t^2 , where h is in metres and t is in seconds. Find how long it takes for the box to fall to
61. ## maths

Write without negative indices: a^-3b/c^-1
62. ## maths

Write 1/2^1-n in non- fractional form.
63. ## maths

Write as powers of 2. (a) 16 (b) 2^m/8
64. ## maths

Find the coordinates of the points of intersection of the straight line y = 3x - 6 with the parabola y = x^2 - 6x + 8 and solve Graphically.
65. ## maths

Given the quadratic equation y = -x^2 + 2x + 3. a) Will the graph turn upwards or downwards? b) What are the coordinates of x and y intercepts? c) What is the coordinate of the turning point? d) Use your answer in parts (a,b,c and d) to sketch the graph.
66. ## maths

2/ x^2 - 9xy^2 - 3/3x + 12y
67. ## maths

Simplify; x^2 - x - 6/ 6xy divide x^2 - 9/2x^2y
68. ## maths

Simplify; (x - y)^3 divide x^2z - 2xyz + y^2z
69. ## maths

Simplify 5x/7 × 15y/8x
70. ## maths

Simplify; p^2 - p - 42
71. ## maths

Solve this equation; p^2 - p - 42
72. ## maths

Solve this equation; p^2 - p - 42
73. ## maths

Simplify; x^2 + ax + bx + ab divide x^2 + 2ax + a^2.
74. ## maths

Simplify this expression; X^2 + ax + bx + ab/x^2 + 2ax + a^2
75. ## maths

Simplify 5x/7 × 15y/8x
76. ## maths

Solve this equation. 2/5 (x^2 + 1) = x
77. ## maths

Find the coordinates of the points of intersection of the straight line y = 3x - 6 with the parabola y = x^2 - 6x + 8. a) Graphically b)Prove your answer in (a) algebraically
78. ## maths

Given the quadratic equation y = -x^2 + 2x + 3. a) Will the graph turn upwards or downwards? b)What are the coordinates of x and y intercepts? c)What is the coordinate of the turning point? d)Use your answer in parts (a,b,c,and d) to sketch the graph.
79. ## algebra

How do you factor 2a^2+5x+3
80. ## maths

Write the equations below in the form y = mx + c. State how many solutions each systems of linear equation have. 3x = 6y 2y - 6x + 2 = 0
81. ## naths

What is the equation of the line which has gradient 2, and passes through midpoint of (3,4) and (5,6)
82. ## maths

What is the value of p if the line (3p + 1)x - 2y = 6p is perpendicular to the line 2x - y + 1 = 0
83. ## maths

Solve 2y - 5x = 3 and x + y = 5 using substitution.
84. ## maths

Show by calculations weather the following lines are parallel or not.. y + 5x = 1 and 0.2 = y - 5.
85. ## maths

Construct the table of values for the following equation 1 - 3x = 2y for -4
86. ## math

a recipe calls for 2 and 3/4 cups of milk. how many cups of milk written as a fraction greater than one are used in the recipe?
87. ## Science

If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore a(n) _____________ with respect to the number of trout that a particular stream can
88. ## math

One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 7 days. How long will it take two pumps, working together, to empty the pool?
89. ## physics

A flower pot with a mass of 3.8kg is hanging by 2 wires that make an angle of 48° from the horizontal. what is the tension in each wire
90. ## physics

A flower pot with a mass of 3.8kg is hanging by 2 wires that make an angle of 48° from the horizontal. what is the tension in each wire?
91. ## maths

When the function f(x) is equal to 2xn + ax2 - 6 is divided by (x-1), the reminder is -7 and when divided by (x+3), the reminder is 129. Calculate the value of "a" and "n" and hence write the polynomial function completely.
92. ## maths

Calculate the arc length that subtends an angle of 55 degree at the centre of a circle with radius r = 5cm.
93. ## maths

The relationship between the vertical height and the horizontal distance of a ball thrown at 45 degree is given by the equation y = x - x^2/50, where y is the vertical height and x is the horizontal distance. (a) Find the maximum vertical height reached.
94. ## maths

The length of a rectangle is 10cm greater than its width. The perimeter of the rectangle is 1m. Find the simplest expression for the perimeter if the width is x.
95. ## Maths

Find dy/dx if y = 1/8.
96. ## maths

Does the parabola y = -3x^2 + 2x - 1 have a maximum or minimum value?
97. ## maths

Find the line that is perpendicular to y = -3/4 x + 2 and passes through (3,4).
98. ## maths

Sine and Cosine rule are both used in solving trigonometry problems.Give an example of when the cosine rule is more appliciable than the sine rule?
99. ## maths

Find the two stationary points on the curve when y = 2x/x^2 + 1
100. ## maths

A circle x^2 + y^ + 2x - 2y -1 = 0 expressed in the following form (x-h)^2 + (y-k)^2 = r^2 where h, k are the coordinates of the centre. How is r the radius given?

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