Tuesday

June 28, 2016
Total # Posts: 98,010

**stats**

Homeowners claim that the mean speed of automobiles traveling on their street is greater than the speed limit of 35 miles per hour. A random sample of 120 automobiles has a mean speed of 37 miles per hour and a standard deviation of 4 miles per hour. Using a significance level...
*April 9, 2016*

**Algebra**

a(2)-a(1)=-2(2^2)+4^2+2(1^2)-4^1 = -8+16+2-4=6 check that.
*April 8, 2016*

**stats**

Suppose a certain species of fawns between 1 and 5 months old have a body weight that is approximately normally distributed with mean µ = 25 kilograms and standard deviation σ = 8 kilograms. Let x be the weight of a fawn in kilograms. Convert the following z ...
*April 8, 2016*

**Physical Science**

D. you are correct.
*April 8, 2016*

**math**

By what percent will a fraction change if its numerator is decreased by 10% and its denominator is decreased by 50%?
*April 8, 2016*

**math**

26.5
*April 8, 2016*

**math**

Ans = 0 sin(cos(7515 tan(cos(tan(tan(cos(tan(tan(Ans × e cos(log(e arccos(arcsin(tan(((ln(cos(cos(e × e × π tan(e tan(tan(cos(cos(π cos(e × e tan(sin(π tan(sin(e × e × e tan(tan(tan(tan(cos(√(π cos(tan(cos(√(...
*April 8, 2016*

**math**

The average test score of RSM students in September increased by 20%. In October it increased by another 15%. By what percent did the average score on the test increase during the two months?
*April 8, 2016*

**math**

A pair of jeans was on sale −15% off the price, but when Bill came to buy them a month later the sale was over and he had to pay the regular price of $170. How much money did Bill lose?
*April 8, 2016*

**math**

x=6
*April 8, 2016*

**math**

i meant that sorry i was in science
*April 8, 2016*

**math**

A tourist starts to walk up a mountain path that is 31 miles long at the rate of 4 miles per hour. After walking for a while, he gets tired and decides to get a taxi. The taxi gets him to the top travelling at a constant speed of 50 mph. If the tourist reaches the destination ...
*April 8, 2016*

**general**

I know it's a stupid question , does the new version of whatsapp has to with the person recieving the message but not seeing it
*April 8, 2016*

**physiçs**

What precautions shouĺd i apply when doing a coefficieñt of friction.force applied to a blocķ on a hořizontal plane?
*April 8, 2016*

**statistics **

A committee of 4 person is to be appointed from 7 men and 3 women, what is the probability that the committee contain exactly 2 women. At least one man.
*April 8, 2016*

**life orientation**

discrimination
*April 8, 2016*

**life orientation**

conlunsion about agrument of human rights violations
*April 8, 2016*

**Physics**

An 80 kg hunter gets a rope around a 400 kg polar bear. They are stationary and on frictionless level ice, initially 60 m apart. When the hunter pulls the polar bear to him, the polar bear will move: 1. 10 m 2. 30 m
*April 7, 2016*

**Physics**

A(n) 12600 lb railroad car traveling at 7.4 ft/s couples with a stationary car of 6490 lb. The acceleration of gravity is 32 ft/s2. What is their velocity after the collision?Answer in units of ft/s. What impulse did the first car receive?Answer in units of lb s.
*April 7, 2016*

**Math**

Jessica was responsible for making party bags for her sister's birthday party. She noticed that there were 6 times as many balloons as stickers and 1/3 as many bubbles as balloons. If there were 135 party items, how many are stickers?
*April 7, 2016*

**Physics**

A 0.19 kg ball of dough is thrown straight up into the air with an initial speed of 13 m/s.The acceleration of gravity is 9.81 m/s. b) What is its momentum halfway to its maximum height on the way up? Answer in units of kg · m/s.
*April 7, 2016*

**hansen**

the family is taking three gift-wrapped presents(using the same boxes.)How much wrapping paper will they need? Draw a net to represent one of boxes
*April 7, 2016*

**Chemistry**

1.5M=1.5mol/dm3 And 0.30ml=30cm3=0.03dm3 So First We Find The No# Of Moles Of HCl Present n=M(conc)*vol(dm3)=1.5*0.03=0.045mol Using Mole Ratios NaOH+ HCl~>H2O+Nacl 1/1=0.045mol/x x=0.045mol Of H2O Therefore volume of a water n(0.045*1.25/1.5)/conc(1.25) now finish it by ...
*April 7, 2016*

**health**

I NEED TO MAKE A HEALTHY FAST FOOD RESTAURANT MENU WITH 2 BREAKFAST,TWO LUNCH,TWO DINNER,AND TWO DESSERT ITEMS.I NEED THE INGREDIENTS OF THE ITEMS.DRINKS DONT COUNT HAS A FOOD ITEM.
*April 7, 2016*

**math/graphing**

any answers
*April 7, 2016*

**math/graphing**

any answers?
*April 7, 2016*

**math/graphing**

Graph the direct variation y=−1.5x. Using the graph, find:The value of y corresponding to the value of x equal to 1; 0; 2; 3
*April 7, 2016*

**Geometry**

mollys rectangular backyard has 300 ft of fencing. one side is 40 ft find the area of the backyard
*April 7, 2016*

**Math**

6.2, 6 1/2 , 6 3/5, 6.7, 6 1/3
*April 7, 2016*

**Chemistry**

Cells use the hydrolysis of adenosine triphosphate (aTP) as a source of energy. This reaction can be written as, ATP(aq) + H2O(l) --> ADP(aq) + H2PO4-(aq), wehre ADP represents adenosine diphosphate. For this reaction, Delta Grxn = -30.5KJ/mol. If all the free energy from ...
*April 7, 2016*

**Hiistory**

Why is it that only 2% of Americans are involved in agriculture but in other parts of the world such as Asia and Africa about 60% are involved
*April 7, 2016*

**Math**

Triangle WXZ is a right triangle. Triangle XYZ is a right triangle. Angle WXY is 86 degrees. What is angle YXZ's measure?
*April 7, 2016*

**chemistry**

In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 27.0 mi/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.
*April 7, 2016*

**Calculus**

Find a cubic function f(x)=ax^3+cx^2+d that has a local maximum value of 9 at -4 and a local minimum value of 6 at 0. Find a, c, and d.
*April 7, 2016*

**Calculus**

Suppose the derivative of a function f is f′(x)=(x−8)^7(x−1)^4(x+19)^8. Then the function f is increasing on the interval what?
*April 7, 2016*

**Bio**

Define and give key feature to the word pollen
*April 7, 2016*

**Calculus**

Consider the function f(x)=xsqrt(36−x^2), −1≤x≤6. This function has an absolute minimum value equal to what?
*April 7, 2016*

**L.O**

Suggestions on how to combat the violation of human rights
*April 7, 2016*

**Geometry**

DId you get the answers?
*April 7, 2016*

**Starcatcher**

PLEASE CHECK MY ANSWERS!! Which of the following is the best definition of a suspense story? (1 point) a story that tells the gory details of violent acts a story that keeps the reader on edge about its outcome** a story that tells about the struggle between good and evil 2. ...
*April 7, 2016*

**physics**

A mass-spring system oscillates on a horizontal frictionless surface with an amplitude of 3.35 cm. If the spring constant is 222 N/m and the mass is 0.580 kg, determine the mechanical energy of the system. Determine the maximum speed of the mass. Determine the maximum ...
*April 7, 2016*

**English**

English is the language of opportunity.why bother to teach indigenous languages
*April 7, 2016*

**English **

English is the language of opportunity.Why bother to teach indigenous languages?
*April 7, 2016*

**Chemistry**

[H3O]=10^-8.26 [H3O]=5.49*10^-9
*April 7, 2016*

**chemisrty**

the ph of a 4.0 mol/L solution of hydrogen fluoric acid is 3.0 is this a concentrated or diluted explain I believe it is concentrated because 3.0 is higher then 0.5 mol/L but it can also be diluted
*April 7, 2016*

**math **

write the equation Eighteen less than 6 times a number is the same as 12 more than the number.
*April 7, 2016*

**Algebra, Mathematics**

Thanks
*April 7, 2016*

**MATHEMATICS**

IF W VARRIES AS D SQUARE WHAT IS THE PERCENTAGE CHANGE IN W IF DECREASED BY 30%
*April 7, 2016*

**Stat**

Of the 64 people who answered "yes" to a question, 6 were male. Of the 70 people that answered "no" to the question, 8 were male. If one person is selected at random from the group, what is the probability that the person answered "yes" or was male?
*April 7, 2016*

**life orientation**

Ways that influnces discrimination of individuals and group of south african
*April 7, 2016*

**life orientation**

Critically discuss six ways that the human rights violations influences individuals,groups and the broader south African community
*April 7, 2016*

**Math**

The table below shows the number of deaths in the U.S. in a year due to a variety of causes. For these questions, assume these values are not changing from year to year, and that the population of the United States is 312 million people. Cause Deaths Passenger car occupant 13,...
*April 6, 2016*

**Geometry**

I mean yards
*April 6, 2016*

**Geometry**

A rectangular grass area ub a park measures 50 yards by 100 yards. The city wishes to put a uniform sidewalk around the grass area which would increase the area by 459 yd ^2. What is the width of sidewalk Is it 9.18 feet
*April 6, 2016*

**Trig**

Find the length of a chord intercepted by a central angle of 25 degrees in a circle of radius 30 feet
*April 6, 2016*

**Geometry**

Is it 6.67 ft
*April 6, 2016*

**Geometry**

Henry has a patio next to his house that is 15ft by 10ft. He wants to put a uniform flower bed around three sides of the patio. The area of the flower bed is 100 ft^2. What is the width of the flower bed?
*April 6, 2016*

**Math **

The ratio of boys to girls in a math class is 5 to 3. When 3 girls and 1 boy join the class, the ratio becomes 4:3. What is the least possible number of students in the class after the new students join?
*April 6, 2016*

**Algebra**

Solve the system of equations and check your solution. x^2+y^2=25 x+2y=10 I tried but I got only the 2 x values 8 plus or minus the square root of 164 all over 2. I know the answer is wrong but I can't find my mistake. Can you show me step-by-step how to solve this system ...
*April 6, 2016*

**Geometry**

First, Area=Length*Width Original Length=3+2*Width 434=Original Length*Original Width 434=(3+2*Width)*Width 434=3*Width+2*Width^2 I solved by graphing, you can do another way if you want. Width is 14 ft. Original Length is 31 ft. Add 4 and you get the answer: 35 feet
*April 6, 2016*

**Geometry**

Roy has a patio that covers 434 ft ^2. He wants to increase his patio 196 ft ^2 by adding 4 ft to both the length and width. The length of the original patio is 3 ft more than twice the width. What is the length of the new patio
*April 6, 2016*

**Geometry**

Im having a hard time setting up the problem.
*April 6, 2016*

**Geometry**

A rectangular grass area ub a park measures 50 yards by 100 yards. The city wishes to put a uniform sidewalk around the grass area which would increase the area by 459 yd ^2. What is the width of sidewalk
*April 6, 2016*

**math**

8 hrs
*April 6, 2016*

**math**

In a science experiment, the temperature of a substance is changed from 42 degrees Fahrenheit to -54 degrees Fahrenheit at an average rate of -12 degrees per hour. Over how many hours does the change take place?
*April 6, 2016*

**math**

my answer: 1 bagel= $0.75 1 coffee= $1.00
*April 6, 2016*

**math**

At a bagel shop, 2 coffees and 4 bagels cost $6.00. Two coffees and 7 bagels cost $8.25. What is the unit price of one coffee and the unit price of one bagel?
*April 6, 2016*

**11 physics**

205.8
*April 6, 2016*

**Math**

A circular sign has a radius of 4.5 inches. What is the area of the sign to the nearest hundredth of a square inch?
*April 6, 2016*

**Social Studies**

@Ms. Sue +Ms. Sue
*April 6, 2016*

**Social Studies**

Who is Cincinnatus? A.A dictator that served for 16 days B. A dictator that served till death c.A plebeian d.a member of the senate My answer:B Plz help me
*April 6, 2016*

**percent discount (math)**

During a sale, Nancy found chalkboards on sale for $57 that had previously cost $75. What percentage is the discount?
*April 6, 2016*

**Math**

A cookie recipe calls for 1/4 cup of brown sugar for one batch of 24 cookies. How many cups of brown sugar would be needed to bake 144 cookies?
*April 6, 2016*

**Chemistry**

For the H 3 CNCO molecule, (Note: The atoms are bonded in the order CNCO, with the three H atoms bonded to the first carbon atom.) answer the following questions. What is the ideal H-C-H bond angle? (0, 30, 45, 60, 90, 109, 120, 145, or 180.) What is the ideal N-C-O bond angle...
*April 6, 2016*

**History (Mrs. Sue, check answer?)**

D is correct.
*April 6, 2016*

**slope**

y = -4x + 41 <--- is the equation ?
*April 6, 2016*

**slope**

Find the equation of the line in slope-intercept form. Slope is −4, and (9,5) is on the line.
*April 6, 2016*

**College Algebra/pre-calculus**

My answers are: (-infinity, 2) U (2, infinity0 (-infinity, 2/5)
*April 6, 2016*

**College Algebra/pre-calculus**

Find the domain (This in fraction form) f(x)=x+3 x^2-4 f(x)= (This is in Radical:2-5x) Any help, thank you!
*April 6, 2016*

**Chemistry**

That's the same thing i chose but I'm confused.
*April 6, 2016*

**College Algebra**

Oh my god, thank you so so much! :-)
*April 6, 2016*

**College Algebra**

Question: Given f(x)=x^2+3x x such that f(x)=4 (ie y=4, what is x?) I am honestly very confused by this question to even attempt to do it. Though here is what I have on the rest of my sheet as my answers. Please correct me if I'm wrong. Thank you! Given f(x)=x^2+3x A. f(2...
*April 6, 2016*

**english composition ll**

the drake equation represents an elaborated type of blank definition a. standard b. complex c. distended d. extended I choose b
*April 6, 2016*

**college chemistry**

PCl5(g) eqarrow PCl3(g) + Cl2(g) The reaction above has an equilibrium constant of 0.800 at 340°C, and deltaH°rxn = 87.9 kJ/mol under standard conditions. Under which conditions will this reaction produce the most PCl3(g)?
*April 6, 2016*

**Language**

1. In the 1800s, it was believed women were good at working on projects to improve the community because (5 points) women were better leaders than men. women were better planners than men. women were more emotional than men. ****women were more moral than men. 2. Which of ...
*April 6, 2016*

**Biology**

I am supposed to make different ligations. These are the stocks I am given: Cut pET41a(+) DNA: 25 ng/ul egfp insert DNA: 7 ng/ul Uncut pET-41a(+)/EGFP recombinant plasmid DNA: 25 ng/ul This is the ligation I am supposed to make: Ligation #1: 1:1 molar ratio pET-41a(+) vector: ...
*April 6, 2016*

**trig**

2(sinx)^2-5cosx-4=0 Solve for all solutions between [0,2pi]
*April 5, 2016*

**precalculus**

2(sinx)^2-5cosx-4=0
*April 5, 2016*

**Science**

Thanks
*April 5, 2016*

**Science**

If you find a mysterious organism, how can you figure out whether or not it is a plant?
*April 5, 2016*

**Geometry**

The expression (n+3) represents the measure of an exterior angle of a regular 18 gon. What is the value of n in the expression
*April 5, 2016*

**Geometry**

Would it be 22
*April 5, 2016*

**Geometry**

I know the n-2 rule but on this question it says a-4 instead of -2 so that confuses me on what to do..
*April 5, 2016*

**Geometry**

The expression (a-4) represents the measure of an interior angle of a regular 20-gon. WHat is the value of a in the expression
*April 5, 2016*

**Geometry**

A rectangular grass area ub a park measures 50 yards by 100 yards. The city wishes to put a uniform sidewalk around the grass area which would increase the area by 459 yd ^2. What is the width of sidewalk
*April 5, 2016*

**Geometry**

Is it 21 feet
*April 5, 2016*

**Geometry**

mr james has a swimming pool in his backyard that is 10 ft by 15 ft he wants to put a concrete sidewalk with uniform width around his pool so that the pool and sidewalk cover a combined area in his backyard of 336 ft ^2. What is the width of the sidewalk?
*April 5, 2016*

**Spanish**

Nevermind. It was a favor de
*April 5, 2016*

**Spanish**

Nvm...
*April 5, 2016*