# Questions Asked onFebruary 21, 2014

1. ## Chem

Complete the Bronsted lowry reactions HPO42-+H+ HPO42-+OH-

2. ## math

i am a number between 60 and 100. my ones digit is two less than my tens digit. i am a prime number. what number am i? explain.

If 7000 dollars is invested in a bank account at an interest rate of 7 per cent per year. A) Find the amount in the bank after 6 years if interest is compounded annually? B) Find the amount in the bank after 6 years if interest is compounded quaterly? C)

4. ## physics

Drag-race tires in contact with an asphalt surface have a very high coefficient of static fric.tion. Assuming a constant acceleration and no slipping of tires, estimate the coefficient of static friction needed for a drag racer to cover 2.1 km in 8 s,

5. ## Math

A container needs to package hazardous chemicals in a special plastic rectangular prism that holds 80 cubic feet. Find the whole number dimensions of the container that would use the least amount of plastic. My answer is 5ft, 2ft, and 4ft

6. ## Physics.

From greatest to least, rank the accelerations of the boxes. C. B. A. D.

7. ## algebra

Which inequality represent the following eight fewer than a number is at least sentence 20 answers are. X-8>20. 8-X>20, x+8

8. ## Chemistry

AgNO3 + NaCl → AgCl + NaNO3 . How many grams of NaCl would be required to react with 446 mL of 0.211 M AgNO3 solution? Answer in units of grams

9. ## Physics

Consider a car is heading down a 5.5° slope (one that makes an angle of 5.5° with the horizontal) under the following road conditions. You may assume that the weight of the car is evenly distributed on all four tires and that the coefficient of static

10. ## Statistics

Selecting a letter of the alphabet: If 3 letters of the alphabet are selected at random, find the probability of getting at least one letter "x". Letters can be used more than once. My answer was: P(at least 1 "x) = 1 - (25/26)^3 = 1951/17576 or 0.11 Is

11. ## physics

The distance between two telephone poles is 49 m. When a 1.6 kg bird lands on the telephone wire midway between the poles, the wire sags 0.149 m. The acceleration of gravity is 9.8 m/s2 . How much tension in the wire does the bird produce? Ignore the

12. ## Chem

Bronsted reaction HCO3-+HF acid?+base?

13. ## Probability

A player is randomly dealt a sequence of 13 cards from a standard 52-card deck. All sequences of 13 cards are equally likely. In an equivalent model, the cards are chosen and dealt one at a time. When choosing a card, the dealer is equally likely to pick

14. ## math

A colony of bacteria is growing in a petri dish which has a maximum capacity of 100mg. The mass of bacteria is increasing at a rate given by the logistic equation. Initially there is 2mg of bacteria and the rate of increase is 1mg per day.

15. ## Physics

Two automobiles, each of mass 800kg , are moving at the same speed, 18m/s , when they collide and stick together. At what speed does the wreckage move if one car was driving north and one east.

16. ## Pre-calculus

C=80,000p/(100-p) A)what happens of the company tries to remove 100 percent of the pollutants? Will it work or will it cost too much? B)draw a diagram to show what the consequences of the last question would be. Label the verticals asymptote(s) and analyze

17. ## Physics

Sherlock Holmes examines a clue by holding his magnifying glass (with a focal length of 26.5 cm) 15.1 cm away from an object. Find the image distance. Answer in units of cm

18. ## math

My Math Problem When wrapping a birthday gift for his mother, Kenji adds an additional 2.5 square feet of gift wrap to allow for overlap. How many square feet of gift wrap will Kenji use to wrap a gift 3.5 feet long, 18 inches wide, and 2 feet high? My

19. ## Science

Which of the following must be true about the structures of axons and muscle cells in order for nerve impulses to stimulate muscle contraction? a- Axons and muscle cells must both have structures that make and secrete the same small molecules. b- axons and

20. ## Chemistry

What would be the density of Hydrogen gas at 500 C and 0.76 atm?

21. ## Physics

A single mass (m1 = 3.2 kg) hangs from a spring in a motionless elevator. The spring constant is k = 253 N/m. 1) What is the distance the spring is stretched from its unstretched length? This first answer is equal to 12.4 cm but I am having trouble on the

22. ## Physics

An electric dipole is formed from two charges, ±q, spaced 1.00cm apart. The dipole is at the origin, oriented along the y-axis. The electric field strength at the point (x,y)=(0cm,10cm) is 320N/C . What is the charge q? Give your answer in nC. What is the

23. ## chemistry

WRITE DOWN REACTION OF HYDROLYSIS OF NH4NO2 IN NET IONIC FORM. INDICATE REACTION OF MEDIUM.

24. ## algebra

To which set of numbers does the number belong-55 answers are, Natural, whole, integers, irrational

25. ## Math! HELP!

For questions 14-15, find the simplified form of each expression. (3/2b^4)^3 (3/5y^4)^-2

26. ## algebra

Insertor=to make the sentence true -1/3-2/5 answers are. = < >

27. ## biology

a farmer sprays insecticide on his crops and notices that the insect pest problems disappear. a year later he tries the same insecticide only to find that he did not achieve the same result. the insect population shows resistance to the insecticide. This

28. ## physics

A person stands on a bathroom scale on a motionless elevator. When the elevator begins to move, the scale briefly reads 200 percent of the person's regular weight. Calculate the acceleration of the elevator, a_{elevator}. Use SI units

29. ## Chemistry

An atom of gold has a mass of 3.271 times 10^-22g. How many atoms of gold are in 5.00g of gold?

30. ## Algebra 1

Genie has 100 feet of fence with which to make a rectangular cage for her rabbit. If she uses the wall of her house as one side, the area of the cage in square feet is given by the polynomial -2w^2 + 100w, where w is the width of the cage in feet. What is

31. ## Math

Kamal bought 7 packs of paper clips for a project. Then he bought 8 more packs. There are 25 paper clips in each pack. How many paper clips did he buy?

32. ## physics!!

A ball of mass m strikes a wall that is perpendicular to its path at speed +v and rebounds in the opposite direction with a speed –v. The impulse imparted to the ball by the wall is 1) 2mv 2)mv 3)-mv 4)zero 5)-2mv

33. ## physics

A ball of mass m strikes a wall that is perpendicular to its path at speed +v and rebounds in the opposite direction with a speed –v. The impulse imparted to the ball by the wall is

34. ## Physics

A skier of mass 59.5 kg comes down a slope of constant angle 1◦ with the horizontal. The acceleration of gravity is 9.8 m/s^2 i. What is the force on the skier parallel to the slope? Answer in units of N. ii. What force normal to the slope is exerted by

35. ## Social studies

I have tried to answer these im just not sure help plz. 1. Which word best describes modern life for Japanese teenagers such as Asuka? relaxed crowded isolated traditional 2. Tropical storms often hit Japan during the ________. summer winter spring fall 3.

36. ## Chemistry

What are the concentrations of HSO4- and SO42- for a 0.0050 M sulfuric acid solution? We are trying to find x but not sure how to find it on the calculator, please help!!!

37. ## algebra

Solve the equation or formula for the indicated variable s=3r4t+or t answers are. t=s/3-r. t=r4-3s t=s/3r4. T=811/s

38. ## Math repost

At a business meeting at panera bread company the bill for two cappuccinos and there house lattes was $14.55. At another table the bill for one cappuccino and two house lattes was$8.77. How much did each type of beverage cost? I'm not sure how this would

149. ## Accointing , Economics and Life Science

I was wanting to find out that with the subjects l got what type of career could l have

150. ## English

Did a song about selfies really just play on my itunes radio? Should it be play it played

151. ## science

Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard

152. ## phisecs

`filling the blanks: sun_________________ than moon. earth is__________________mercury.''.

153. ## Liberty

What is the sample Z score to reject the null hypothesis if the cut off Z score +-2.31?

154. ## RE: History

Ms. Sue, Here are my reactions to the article about the survivors. Horrified, disgusted and heart-broken

155. ## Physics 141

A car is on a circular track of radius r = 100 m. It's tangential speed is 30 m/s. How many lateral gravities does the driver feel?

156. ## Calculus

¡ì(up:1 down:0) (x^3 dx)/(x^2+2x+1)

157. ## Calculus

¡ìdx/(x^2-1)^2

158. ## Math

Given f(x) = –5x + 1, what is f(–2)?

159. ## Intermediate algebra

Can you show the work of how to work this word problem ? A local electronics store will sell 7 ax adapters and 2 rechargeable flashlights for $86 or 3 ac adapters and 4 rechargeable flashlights for$84. What is the price of a single ax adapter and a single