# Questions Asked onJune 11, 2017

1. ## Statistics

a manufacturing machine has a 8% defect rate. if 5 items are chosen at random, what is the probability that at least one will have a defect

2. ## Statistics

if a seed is planted, it has a 70% chance of growing into a healthy plant.if 6 seeds are planted, what is the probability that exactly 1 doesn't grow?

3. ## math

Anita's, a fast-food chain specializing in hot dogs and garlic fries, keeps track of the proportion of its customers who decide to eat in the restaurant (as opposed to ordering the food "to go"), so it can make decisions regarding the possible construction

4. ## Chemistry - Ionic Compounds

List all possible unit formulas (chemical formulas) that can be constructed by the formation of binary ionic compounds from the following elements. (Separate substances in a list with a comma.) Br (Z = 35), Sr (Z = 38), Ca (Z = 20), Ga (Z = 31), O (Z = 8)

5. ## Math

An apple cost x cents and an orange costs y cents more than an apple .Express the cost of 8 apples and 12 oranges in term of X and Y.

6. ## Physics

The speed of sound in a classroom is 343m/s. A) A tuning fork of frequency 512Hz is struck. What length of open air tube is required to create a resonant sound at the 1st harmonic? wavelength=v/f=343/512=0.67m L=.5wavelength=.5(.67)= 0.335m B) Fore the

7. ## math

The ratio of a quarterback’s completed passes to attempted passes is 7 to 9. If he attempted 45 passes, find how many passes he completed. Round to the nearest whole number if necessary. A. 9 passes B. 58 passes C. 5 passes D. 35 passes D?

8. ## Chemistry - Naming

What would be the name of this compound? Si4Br8

9. ## math

Perform the indicated operation and simplify the result if possible. 2 ft. 11 in. + 7 ft. 3 in. A. 9, 2 B. 10, 4 C. 9, 3 D. 10, 2 ? not sure

10. ## Physics 11

As water waves from the ocean approach a shallow beach, their wavelengths become shorter. Explain why. v=fwavelength, frequency remains constant & velocity & wavelength decrease or increase w/ water depth. Is that a reasonable answer or are they looking

11. ## Physics 11

The speed of water waves is 30cm/s in deep water & 15cm/s in shallow water. If the wavelength in deep water is 1.0cm, what is the wavelength in shallow water? (v2/v1)=(wavelength2/wavelength1) Therefore (15/30)=(wavelength2/1) - 15=30wavlength2

12. ## Chemistry

When 0.20 mol of hydrogen gas and 0.15 mol of iodine gas are heated at 723 K until equilibrium is established, the equilibrium mixture is found to contain 0.26 mol of hydrogen iodide. The equation for the reaction is as follows. H2(g) + I2(g) ↔ 2HI(g)

13. ## maths

It costs a publishing company \$50000 to make books. The \$50000 is a fixed cost or a cost that cannot change. To help the publishing company sell the books, a marketing company charges \$4 for each book sold. If the company sells the book for \$9 each, how

14. ## Physics

A piece of copper ball of mass 20g at 200°c is placed in a copper calomiter of mass 60g containing 50g of water at 30°c ignoring heat losses.calculate the final steady temperature of the mixture

Angle a lies in the second quadrant and angle b lies in the third quadrant such that cos(a)=-3/5 and tan(b)=24/7. Determine an exact value for a) cos(a+b) b) sin(a-b) c) sin2a

16. ## chemistry

A solution of CaCl2 is prepared by dissolving 1.004 g of the solid in approximately 30 mL of water. How many moles of CaCl2 does this solution contain?

17. ## Chemistry

How many kilograms of NH3 are needed to produce 1.00×10*kg of (NH4)2SO4?

18. ## physcis

name any 5 models present in national science center related to force and laws of motion

19. ## Math

Lamp posts long one side of a street are 6 m apart. If they extend for 1 and a half kilo metres .Find the number of lamppost along the Street.

20. ## Physics

A child leaves her book bag on a slide. The bag, which is at the top of the slide, starts from rest and reaches the bottom in 1.63 s. The mass of the book bag is 2.55 kg, the length of the slide is 2.90 m and the angle of incline is 35.0°. (Assume the

A wheel of a child's car revolves at 15 rpm. a) What is the angular velocity of the wheel in radians per seconds? b) A painted dot on the circumference of the wheel is 12 cm from the center of rotation of the wheel. How far does the dot travel in 5s?

22. ## Statistics

in a population where 45%of voters prefer candidate A. an organization conducts a poll of 5 voters.Find the probability that 2 of the 5 voters will prefer Candidate.

23. ## math

i have 20kg of wood.i brun 65% of it and keep the rest,how much do i use for bruning.

24. ## math 5

Iam a seven digit number.My millions place is 5.My ten thousands place is the difference between my millions place and hundreds place.And my remaining place value is 0.What number am I.

25. ## maths

find the following square roots,using 'prime factors': i) 784 ii) 7056. 1 iii) 20---- 4 please give answers and tell me how to do. please

26. ## Math

Solve using eliminating method2) 3x-5y=15 x-2y=8

27. ## Math

Solve using 2) 3x-5y=15andx-2y=8

28. ## Language arts

Which of the two speeches-Kennedy's Inaugural Address or his "We choose to go to the Moon" speech, is more inspirational? Explain.

29. ## Maths

Factorize: ab2(Square)-ac2 (square),hence show that 10x(5.5)-10 (4.5)2 (square)=100

30. ## Maths

If x:y=9/2:16/3 AND y:z=25/4:17/2, find x:y:z Question of proportional parts please Answer

31. ## Maths

If the ratio between the two circles is 9:16,find i)the ratio between the radii ii)the ratio between their circumference Thank you

32. ## English - Analysis of quotation

I need help analysing a quote for an English assignment but I can't find the deeper meaning: "Day of wrath, that day of burning, Seer and Sibyl speak concerning, All the world to ashes turning." ~ Abraham Coles I would be very grateful if someone could

33. ## Math

Simplify 5h-3[4k-6m+2{3h-(2h+3k)}]

23×21a×21a

35. ## Physics

A satellite is orbiting a distant planet of mass 9.6e25 kg and radius 86700 km. The satellite orbits at a height of 8610 km above the surface of the planet. a) Determine the acceleration due to gravity at the location of the satellite orbit. b) Determine

36. ## Physics

A toddler applies a 25.0 N force to a chair over a distance of 2.5 m, the chair is being pushed across a smooth floor against a force of friction (10.0 N resistance). How much work is being done?

Determine an exact value for the expression sinπ/6 tanπ/3 ÷ cscπ/4

Determine an exact value for the expression sec4π/3*cot5π/6-tan3π/4

39. ## Physics !! Help Needed UrGeNtLy!!

A toddler applies a 25.0 N force to a chair over a distance of 2.5 m, the chair is being pushed across a smooth floor against a force of friction (10.0 N resistance). How much work is being done?

40. ## Multivariable calculus

Hello, I have the next exercise about chain rule in multivariable calculus: I have to show that the differential equation: y(dz/dx)-x(dz/dy) = (y-x)z can be change to the equation: (dw/dv) = 0 using the new variables: u= (x^2)+(y^2) v = (1/x)+(1/y) w =

41. ## Algebra

Solve 3^2x+1 = 5(3^x) + 2 I would know how to solve it if it was only 3^2x+1, but now it seems more complicated.

42. ## Science

Use the terms solar, kinetic, electrical and potential energy gravitational energy to explain energy transformations used for renewable energy systems

43. ## Algebra

Find a trigonometric equation in the form y = a sin (b (x-c)) which has a minimum of (3, -5) and a zero value of (6, -1). There is a graph with the minimum and the zero value labeled. It is wavy with suggests that it is a sin curve.

44. ## math-precalculus

Eliminate the parameter t to find a Cartesian equation in the form x=f(y) x(t)=4t^2 y(t)=4+2t

45. ## Science

How does the albedo effect climate and can drive positive feedback

46. ## Algebra

If x + (1/x) = a Find these in terms of a: x^2 + (1/x^2) and x^3 + (1/x^3) I got a^2 and a^3 as my answers, but the book says a^2 - 2 and a^3 - 3a. How did they get that?

47. ## Science

An aluminium cube measures 10 cm on each side. The density of aluminium is 2.7g/cm–³. What is the cube's mass? I need help regarding the formula.

48. ## Science

Madeira uses the water cycle to generate electrical power but this becomes a problem during the summer. What is the problem and explain the renewable energy solution.

49. ## Math

Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels at 85 miles per hour. The westbound train travels at 95 miles per hour. How long will it take for the two trains to be 252 miles apart?

50. ## Science

An aluminium cube measures 10 cm on each side. The density of aluminium is 2.7g/cmÃ¢â‚¬â€œÃ‚Â³. What is the cube's mass? I need help regarding the formula.

51. ## physics

a boat heads directly across a river with a speed through the water 8m/s. the river current is 2m/s a. what is the magnitude and direction of the boat velocity relative to the earth? b.when the boat reaches the other bank, how far will it be?

52. ## Physics

An object starting from rest travels 20m in first 2 seconds. What will be the distance covered by it in next 4 seconds

53. ## Math

Find The Lateral Surface Area And Total Surface Area Of A Right Circular Cylinder In Which: r = 4ft, h = 12ft