Tuesday
July 29, 2014

Posts by Alice


Total # Posts: 540

please help geometry
you need to find the length of a broken automitive belt. the belt ran around 2 pulleys whose centers were 11 in apart. one of the pulleys is 4" dia. and the other is 6" dia. what is the totoal length of the belt needed to connect thr pulleys?

geometry
how many 3"x4"x6" boxes will fit in a 2'x3'x8' container?

bonds
YOU WANT TO BUY A TREASURY BILL WHOSE FACE VALUE IS $20000 IN 30 DAYS. THE INTEREST RATE IS 4.61%. HOW MUCH WILL YOU HAVE TO PAY FOR THE BILL?

7th grade math/ geometry
a costruction crew is repairing a 201 foot long section of a highway. The road is 8 feet wide and the concrete must be poured to the depth of 6 inches. How many cubic feet will be required for the repair?

Life orientantion
Describe 5 factors of Hiv

algebra
To balance a seesaw, the distance, in feet, a person is from the fulcrum is inversely proportional to the person's weight, in pounds. Peter, who weighs 150 pounds, is sitting 3 feet away from the fulcrum. If Joey weighs 90 pounds, how far from the fulcrum should he sit to ...

Math
The weather forecast states that there is a 70% chance of rain tomorrow. Which of the "definitions" of probability is relevant to this statement and explain why?

Math
I get it , Thanks for everything

Math
Or could be 3√5/4*3 = 6√5.

Math
Thank you for your answer but I was thinking that the answer will be √9.5/12 then 3√5/12 and I do not know what to do with the denominator "12".

Math
Simplify the expression (square root) √45/144 Thanks.

Physics
A spring with a spring constant of 35.0 N/m is attached to different masses, and the system is set in motion. What is the period for a mass of 34 g? Answer in units of s

Physics
A spring with a spring constant of 35.0 N/m is attached to different masses, and the system is set in motion. What is its period for a mass of 2.4 kg? Answer in units of s

Chemistry
Find the Qsp when 9 drops of 0.014 M Na2CO3(aq) are added to 25 mL of 0.003 M AgNO3(aq). The solubility product of Ag2CO3 is 6.2 × 10−12. Assume 20 drops per milliliter.

Math
47 Fahrenheit = Celsius give answer in decimal form, to the nearest tenth?

Geometry
The length of one base of a trapezoid is 19 inches and the length of the median is 16 inches. Find the length of the other base.

Geometry
Abcd is an isosceles trapezoid with a(10,-1) b(8,3) and c(-1,3). Find the coordinates of d

Geometry
Thank you so much!

Geometry
For diagonals of square Abcd intersect at e . If ae =2x+6 and bd =6x-10 find ac

Chemistry
How many moles of NaCl are in 2.00mL of 1.00M NaCl?

math
A basket contains 15 red numbered balls and 10 white numbered balls. A sample of five balls is selected. How many samples contain three red balls and two white balls? Explain your answer.

Chemistry
A solution has a mass of 95.00g and a density of 2.147 g/mL. What is the volume of the solution?

Physics
A proton moves eastward in the plane of Earth’s magnetic equator so that its distance from the ground remains constant. What is the speed of the proton if Earth’s magnetic field points north and has a magnitude of 5.2 × 10−5 T? The acceleration of g...

Physics
A proton moves eastward in the plane of Earth’s magnetic equator so that its distance from the ground remains constant. What is the speed of the proton if Earth’s magnetic field points north and has a magnitude of 5.2 × 10−5 T? The acceleration of gravity...

RATIOS
10.6 PESO IS $1 US DOLLAR. YOU HAVE 2500 PESO. YOU WANT TO EXCHANGE TO US DOLLAR. HOW MANY WOULD YOU GET?

RATIOS
A MODEL TRAIN IS 1;48 ON SCALE. THE ENGINE IS 13 5/8 INCHES. HOW MANY FEET IS THE ACTUAL ENGINE?

Math
Write the following complex number in polar form: z = 4 − 4i

maths
alissa is33 years old jacj is three times alyssa's age. How old are Jack and alyssa altogether?

chemistry
what is the specific heat of copper if the temperature of a 100g sample of copper is increased by 23C when 886J of heat is added ?

MATH
a car dealer sells a car with the following options: auto or manual transmission,standard or deluxe stereo,air or no air, manual or power locks, 15 or 16 inch tires, fabric or leather seats. how many different configurations can this car be sold in?

MATH
find a counterexample to prove the following is false: x is less than or equal to 2x

MATH
heres my equation: c(coat)+s(shirt)+t(tie)=$300 c=2s s=2t+40 i need to know how to solve this to get the cost of each item?

math
a coat,shirt and tie cost $300. coat costs twice as much as the shirt. shirt cost $40 more than twice the cost of the tie. what are the cost of each item?

math
a florist has 9 dozen roses. all are either red or white. he has 44 more red than white, how many white roses does he have?

chem
If 20.5 mL of a 5.256 M solution of benzoic acid is used in an experiment similar to experiment 4, how many grams of benzoic acid is in the starting solution? (molar mass of benzoic acid = 122.12 g/mol) Be sure to pay attention to significant figures. The answers are all in gr...

chem
What does the concentration of the benzoic acid in the original liquid and the extracting liquid relate to after the extraction is completed? Answer a. The density of the original liquid. b. The density of the extracting liquid. c. The solubility of benzoic acid in each liquid...

mathematics
Mr. Collins is buying trsin tickets for $42 each. What is the total cost of the tickets? Use the distributive property to solve.

Physics
A 4.2 × 10^3 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 18.4◦ with the horizontal. An average frictional force of 4.1×10^3 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is 4...

Chemistry
What is the density of 3.40 liters of hci

Physics
A spring has a a constant of 650 N/m. How far must it be compressed to push a 4kg object on a friction-less surface to 3 m/s?

Math
This is from the actual problem - A consumer product testing lab tested 400 13-watt compact fluorescent light bulbs by turning them all on at once, leaving them on until they burned out, and recording the time-to-failure of each bulb. The test revealed a symmetric and mound-sh...

Math
What is the approximate percentile rank of a lightbulb that failed at 9000 hours if the number of lightbulbs is 400? The number of lightbulbs that lasted between 5400 and 9000 were about 326 lightbulbs. The mean is 7800 and the standard deviation is 1200 My guess was: percenti...

Math
The amount of a monthly electric bill (B, measured in $) depends on the amount of electricity used that month (E, measured in kWh). A typical public utility charges $0.12 per kWh for the first 300 kWh used, $0.17 per kWh for the next 600 kWh used, and $0.29 per kWh for any exc...

social studies
What is the population of:Nile Valley,Ganges Valley and Eastern China

Math
ah, thanks... i'm only taking "liberal arts math", so have only done a little bit of calculus. how did you get this part? H(.2559) = appr 319.7 H(.744) = appr 312.7

Math
H(t) = 0.013t^2 + 0.81t + 316 + 3.5 sin 2πt Ah, the formula should have an exponent!

Math
The formula should actually be: H(t) = 0.013t2 + 0.81t + 316 + 3.5 sin 2πt

Math
Could someone explain how to find which months during the year the maximum/minimum points occur for this problem occurs? I think it's around May and Oct, but I don't get how to determine that on the graph The National Oceanic and Atmospheric Administration (NOAA) has b...

Math
how did you determine the maximum and the minimum?

Math
NOTE - the formula should be: H(t) = 0.013t^2 + 0.81t + 316 + 3.5 sin 2πt

Math
Could someone explain how to solve this math problem? I've graphed it, but I'm not sure how to solve the rest of the questions. The National Oceanic and Atmospheric Administration (NOAA) has been measuring atmospheric carbon dioxide concentations (in parts per million)...

Math
Could someone explain what each part of this formula represents? H(t) = 0.058t^2 + 0.41t + 516 + 2.5 sin(2π)(t)

chemistry
What percentage of the Ba2+ in solution is precipitated as BaCO3(s) if equal volumes of 2.4*10^-3 M Na2CO3(s) and 1.1*10^-3M BaCl2(aq) are mixed

world geography
According to the Ministerial Conference on the Protection of Forests in Europe (MCPFEs), sustainable forest development is defined by these three criteria.

EARTH SCIENCE
You are given a 6-month assignment by your employer to work at a remote location in Australia. In order to pack as lightly as possible, you try to research the climate of a small town in Australia. There is little data since no major cities are located within 300 miles of the ...

Physics
Three blocks are in contact with each other on a frictionless horizontal surface. A 417 N horizontal force is applied to the block with mass of 3.7 kg as shown in the figure below. The acceleration of gravity is 9.8 m/s^2. (the picture looks like this) F *----->[3.7 ...

arithmetic
If you have 3.14 lbs of a food and it costs .88 a lbs. then how much money would that 3.14 cost?

physics
A block of mass 3.62 kg lies on a frictionless horizontal surface. The block is connected by a cord passing over a pulley to another block of mass 7.8 kg which hangs in the air, as shown. Assume the cord to be light (massless and weightless) and unstretchable and the pulley to...

Physics
An ant on a picnic table travels 40 cm eastward, then 25 cm northward, and finally 15 cm westward. What is the ant's directional displacement relative to its original position?

Physics
An ant on a picnic table travels 40 cm eastward, then 25 cm northward, and finally 15 cm westward. What is the ant's directional displacement relative to its original position?

Physics
A ferry is crossing a river.The ferry is headed due north with a speed of 2.5 m/s relative to the water and the river's velocity is 2.0 m/s to the east. What is the magnitude and direction of the ferry's velocity relative to Earth. ( Give the angle from east 0 degrees )

5th grade math
Madmistro, your idea with the diagram is great but you will be planting two tulips in the starting position. Therefore, I think that subtract 1 which yields 19 is the better answer. Although it did not say that 2 tulips could not be planted in the same hole.

science
how are the stone henge and cubi series alike?

Calc
Find the second derivative of the function. f(x) = e−3x + 5e4x

Trigo
Two men travelling in opposite directions at the rate 18 and 22 miles per hour respectively started at the same time from the same place. In how many hours will they be 250 miles apart?

chinese
1. §Ú¨S¦³ªÅ 2.ÙTÙT¡A¤U¦¸¨£ 3.¶Ù¡A§A¦n¶Ü? 4.¤£­n¥´ÂZ§Ú¡A§Ú¦bŪ®&...

physics question
What is a magnetic field, and what is its source?

physics question
Every spinning electron is a tiny magnet. Since all atoms have spinning electrons, why are not all atoms tiny magnets?

physics question
Why do some pieces of iron behave as magnets, while other pieces of iron do not?

physics question
Why will dropping or heating a magnet weaken it?

physics
Pigeons have multiple-domain magnetite magnets within their skulls that are connected through a large number of nerves to the pigeon's brain. How does this aid the pigeon in navigation? (Magnetic material also exists in the abdomens of bees.)

physics opinion
A common pickup for an electric guitar consists of a coil of wire around a permanent magnet. The permanent magnet induces magnetism in the nearby guitar string. When the string is plucked, it oscillates above the coil, thereby changing the magnetic field that passes through th...

physics
What is the primary difference between an electric motor and an electric generator?

physics
Calculate the cost of operating a 65 W light bulb continuously for a 30-day month when electrical energy costs $0.23/kW·h. $ 1 How do you calculate cost? whats the equation?

physics
A color television has a power rating of 325 W. How much current does this set draw from a potential difference of 120 V? 1 . A i got 2.42 but its wrong?

physics
How much charge passes through a cross-sectional area of a copper wire in 0.8 s if I = 3.5 A? 1 C -Work equation?

physics
A net charge of 47 mC passes through the cross-sectional area of a wire in 19.0 s. (a) What is the current in the wire? 1 A (b) How many electrons pass the cross-sectional area in 1.0 min? 2 electrons

physics
A hair dryer draws a current of 9.7 A. (a) How much charge passes through the hair dryer in 3.5 min? 1 C (b) How many electrons does this represent? 2 electrons

Math
A landscaper is choosing a compost bin. He wants it to hold exactly 12 cubic feet of compost. Using whole numbers only, how many different sizes can he choose from?

Physics
A −5 × 10−6 C charge is brought from a very distant point by an external force and placed at the origin. Calculate the magnitude of the electric force on this charge. Answer in units of N

Physics
Charge 2 × 10−18 C is on the y axis a distance 4 m from the origin and charge 9 × 10−18 C is on the x axis a distance d from the origin. What is the value of d for which the x component of the force on 9 × 10−18 C is the greatest? The Coulom...

Chemistry
No, I did the same online quiz and CH3NH3+ is not correct. Weakest aicd will be least reactive, that means it will have larger concentration, in this CH3NH3+ and NH3OH+ are functioning as acids, CH3NH3+ is 95%. so the strongest acid should be NH3OH+

Basic Chemistry
The density of a 40.0% by weight aqueous solution of NaOH is 1.432 g/cm3 what is the molarity of NaOH?

alg2trig
2(3y-4)^(3/5)-4=50

alg2trig
16log4^1/64=x

Physics
A train at a constant 41.0 km/h moves east for 38 min, then in a direction 44.0° east of due north for 25.0 min, and then west for 59.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of north negative) of it...

alg2/trig
1)3x^2-12x-21 solve by completing the square in simplest radical form 2) (1/x+3)-(2/3-x)=(4/x^2-9)find values of x 3)3/radical(3a^2b^4) is equivalent to 4) factor completely 27x^-75x^4

math116
solve using the multiplication principle, -4x>1/11

Business
1. What effect would the following actions have on a firm’s current ratio? Assume that new working capital is positive. a. A short term bank loan is repaid. b. A long-term debt is paid off early. For a, would the current ratio move away from 1. For b, would the current ra...

sociology- social work
What influences in your life draw you to work with older adults? What do you anticipate will be a rewarding aspect of this work? What might be a challenge? What do others you speak to say when you indicate that you are interested in working with older adults?

sociology
What areas of social services, business and industry could benefit from the expertise and skills of a trained gerontological social worker?

Math
For 1985 through 1996, the number, C (in thousands), of videos rented each year in Moose Jaw can be modeled by C= 0.069(t^3+4t^2+37t+600) where t=0 represents 1990. During which year are 60.4 thousand movies projected to be rented? I'm not sure how to solve this problem. C...

Algebra 2
For 1985 through 1996, the number, C (in thousands), of videos rented each year in Moose Jaw can be modeled by C= 0.069(t^3+4t^2+37t+600) where t=0 represents 1990. During which year are 60.4 thousand movies projected to be rented? Could someone please show me the steps to thi...

Chemistry
A sealed balloon is filled with 1.20 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 250. torr and the temperature is -27°C. What is the change in volume of the balloon as it ascends from 1.00 atm to a pressure of ...

Math
Divide the sum of x^2+4x-1 & 2x-2 by -3x^4

math
Thanks!

math
Base of a triangle is 12 inches longer than twice the length of altitude x. Write polynomial area of triangle.

U.S. History
Tank you very much for your help.:) actually my teacher hasn't pointed anything out since I don't have one. My younger brother and I are home-schooled.

U.S. History
By the way Google is currently not working on my computer, so if your going to give me search sites please use Bing

U.S. History
Traces the creation of the American government from Ancient Greece to Shay's rebellion. What am I supposed to do???

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