# LIndsey

Popular questions and responses by LIndsey
1. ## chemistry

Suppose you are asked to find the area of a rectangle that is 2.1-cm \rm cm wide by 5.6-cm \rm cm long. Your calculator answer would be 11.76 cm 2 \rm cm^2 . Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not

19. ## algebra 1

The Fun Guys game rental store charges an annual fee of $20 plus$6.50 per game rented. The Game Bank charges an annual fee of $50 plus$3.50 per game. For how many game rentals will the cost be the same at both stores? What is that cost?

20. ## geometry

Remove the radical from the denominator below. Do not simplify the answer. -2 sqrt15 / (6- sqrt13)

21. ## math

The test Keyshawn's class took finished at 10:30 A.M. The first part of the test took 30 minutes. There was a 15 minute break. The second part of the test also took 30 minutes. At what time did the test start?

22. ## A/P Calculus

A cyclist is riding on a path whose elevation is modeled by the function F(X)=0.2x where x and f(x) arte measured in miles. Find the rate of change of elevation when x=5. ? Supposed answer: ?? 1

23. ## Chemistry

Consider: C6H12)6 + 6O2-> 6CO2 + 6H2O + Energy a)If I have 90 grams glucose and all is consumed by oxygen, then how many grams of water will be produced? b)How many grams of oxygen will be consumed? c)How many grams of sugar will be burned off if 85 grams

24. ## Algebra

In a batch of 860 calculators, 9 were found to be defective. What is the probability that a calculator chosen at random will be defective? Write the probability as a percent. Round to the nearest whole number percent if necessary. a. 1% b. 10% c. 3% d. 7%

25. ## Algebra

A construction company orders 2900 new light bulbs for a new office building. If the probability of a light bulb being defective is 1.9%, predict how many of the light bulbs are likely to be defective. Round your answer to the nearest whole number.

26. ## Algebra

A cell phone company orders 400 new phones from a manufacturer. If the probability of a phone being defective is 2.1%, predict how many of the phones are likely to be defective. Round your answer to the nearest whole number.

27. ## math

A sample of 4 balls is to be selected at random from an urn containing 18 balls numbered 1 to 18. Five balls are green, 6 balls are white, and 7 balls are black. (a) How many different samples can be selected? (b) How many samples can be selected that

28. ## Algebra

Which property is illustrated by 45 + 19 = 19 + 45? A. Commutative property of addition B. Identity property of Addition C. Associative property of addition D. zero property of addition

29. ## Solve. W rite each answer in simplest form.

Erin buys a bag of peanuts that weighs 3/4 of a pound. Later that week, the bag is 2/3 full. How much does the bag of peanuts weigh now? Show your work

30. ## physics

A scale is marked off in centimeters on a long table. A coin initially at the position labeled 130.0 is moved to the position marked -20.0. What is the displacement of the coin?

31. ## Physics/Charges

Point charges Q1 = 50 µC and Q2 = -20 µC are placed 2 meters apart. Where can I put a third charge so that the net electrical force on it is zero?

32. ## Chem help

For which of the following molecules would the intermolecular forces be influenced mainly by dipole-dipole forces? PH3 CH3OHO HF C2H5OH CH3COCH3 how do I determine this

33. ## Physics

~I got a and b right but c i can't figure out Freight trains can produce only relatively small acceleration and decelerations. (a) What is the final velocity of a freight train that accelerates at a rate of 0.0600 m/s2 for 8.00 min, starting with an

34. ## Chemistry

i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there? Responses Chemistry - DrBob222, Monday, February 16, 2009 at 12:35am Just ignore the Cl^-. Co(H2O)6Cl3 ==>

A 5-kg rock is lifted 2 meters in 5 seconds. How much work is done? How much power is done?

36. ## chemistry

What are the monomers of aspartame? I can only get one, which is methan ol, but what are the others?

37. ## Algebra

You want to determine the number of text messages students at your school make in a month. You select 10 freshmen, 10 sophomores, 10 juniors, and 10 seniors to ask, a. random b. systematic c. stratified Would the answer be systematic

38. ## Algebra

A spinner is numbered 1-8. What are the ODDS of landing on a number greater than 5?

39. ## Algebra

You have the numbers 1–24 written on slips of paper. If you choose one slip at random, what is the probability that you will NOT select a number which is a multiple of 3? a. 2/3 b. 3/8 c. 1/3 d. 5/8

40. ## Algebra

A drug trial is testing the effectiveness of two drugs. If 40 patients are given Drug A, 80 patients are given Drug B, and 20 patients are given a placebo, what is the probability that a patient will receive drug B? a. 4/7 b. 6/7 c. 3/10 d. 1/5

41. ## Algebra

In a batch of 280 water purifiers, 12 were found to be defective. What is the probability that a water purifier chosen at random will be defective? Write the probability as a percent. Round to the nearest whole number percent if necessary. a. 11% b. 13% c.

42. ## Physics

if the coefficient of static friction between a 55 kg box and the floor is 0.67 with what minimum horizontal force must it be pulled to get the to crate move

43. ## Algebra

What method(s) would you choose to solve the equation? Explain your reasoning. 4x^2-48=0 a. Quadratic formula, graphing; the equation cannot be factored easily since the numbers are large. Selected:b. Square roots; there is no x-term. c. Factoring; the

44. ## algebra

The height of a projectile fired upward is given by the formula s = v0t – 16t^2, where s is the height, v0 is the initial velocity and t is the time. Find the times at which a projectile with an initial velocity of 128 ft/s will be 176 ft above the

45. ## Math

Log2 (x-6) + log2 (x-4) - log2 X=2

46. ## math

the bulletin board in Shain's classroom is 3 1/4 feet by 4 1/2 feet. what is the area of the bulletin board? is this right? 24 1/2 ?

47. ## math

write all the possible odd 5-digit numbers using the digits 1,4,7,8 and 0, with the 1 in the ten thousands places.

48. ## Physics

Using the following equations as a guide (some may be used, some may not-choose wisely) y1 OR x1= initial position x2 or Y2 =final position V1 or Vi= Initial velocity V2 or Vf- Final velocity a= Acceleration T- time Equation 1.) x2=x1 +vt Equation 2.) v2=

49. ## geometry

x^2+2xy-15y^2 is this factorable?

50. ## Algebra 1

what is the solution of the following system of equations? 1.) 5x + 7y =3 2x = -3y +1

51. ## chemistry

In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 38.0mi/gal , how many liters of gasoline would you need to buy to complete a 142-km trip in Europe? Use the following conversions: 1km=0.6214mi and 1gal=3.78L.

52. ## Physical Science

Fill in the blanks using the correct term from the list below. Active Combustion free heating systems passive heat pump thermal energy stroke 1. A house with large windows on its south side and few windows on its other sides probably uses a(n) Blank solar

53. ## Chemistry

Please also, help me set up this problem. Acetylene, C2H2, can be converted to ethane, C2H6, by a process known as hydrogenation. The reaction is C2H2(g)+2H2(g)⇌C2H6(g). Given the following data at standard conditions (all pressures equal to 1 atm and

54. ## Chemistry

Help me set up this problem. I have been looking at a few examples of similar problems and I keep getting the wrong answers. I'm getting really confused. Q: The standard free energy change ΔG∘ and the equilibrium constant K for a reaction can be related

93. ## Government

What are 10 ways to increase voter turnout in the United States? If possible, rovide justification for each one because some of the turnouts are unclear...

94. ## physics

In preparing to shoot an arrow, an archer pulls a bowstring back 0.49 m by exerting a force that increases uniformly from 0 to 277 N. What is the equivalent spring constant of the bow?

95. ## Math

A health inspector wants to check compliance with a new city ordinance on meat storage. Since he can only inspect 10 of the 33 stores, he chooses to do a stratified random sample that consists of all 3 of the large chain stores, 4 of the 10 smaller chain

96. ## math

if a leaky faucet drips eight ounces of water per minute how many gallons per day is that

97. ## geometry

9x^2-25 ? so lost.

16n^2-9 ?

99. ## geometry

also how do you factor 16n^2-9 ?