Sunday

April 20, 2014

April 20, 2014

Total # Posts: 346

**Math **

A piece of a broken wheel is shown. It was taken to a machine shop to be replaced with a new “whole” wheel. Find the radius of the wheel AC=10cm, BD=3 cm and D is the midpoint of AC. Round to the nearest hundredth.

**Math **

The curvature of a circle with radius r is defined as Descartes’ formula gives a relationship between the curvatures of the four circles. What are Descartes’ formula and the curvature of a circle? What does the sign of the curvature of a circle mean? State Descartes&...

**Math **

An organization is planning a dance. The band will cost $400 and advertising costs will be $100. Food will be supplied at $2 per person. a. How many people need to attend the dance in order for the organization to break even if tickets are sold at $7 each? b. How many people ...

**Math **

The percent grade of a highway is the amount that the highway raises or falls in a given horizontal distance. For example, a highway with a four percent grade rises 0.04 mile for every 1 mile of horizontal distance. a. How many feet does a highway with a six percent grade rise...

**PC **

A piece of a broken wheel is shown. It was taken to a machine shop to be replaced with a new “whole” wheel. Find the radius of the wheel AC=10cm, BD=3 cm and D is the midpoint of AC. Round to the nearest hundredth.

**statistics**

If boys and girls are equally likely to be born, what is the probability that in a randomly selected family of 6 children, there will be at least one boy? (Find the answer using a formula. Round your answer to three decimal places.)

**math**

There are 2 leaves along 3 in.of an ivy vine. There are 14 leaves along 15 in. of the same vine. How many leaves are there along 6 in. of the vine?

**Math**

Becca wants to make a giant cherry pie to try to break the world record. If she succeeds in making a pie with a 20 foot diameter, what will be the total distance around the pie?

**Math**

How many square inches of crust would it take to cover the bottom of a pie dish with a 15 diameter?

**Math**

Pam served her apple pie on a 13 inch diameter dish. She wanted to tie a ribbon around the dish to make it a little more festive. How long does the ribbon need to be in order to fit around the dish?

**Fitness Topics**

When you massage an exercised muscle, you help to A. increase the efficiency for the removal of wastes. B. decrease the amount of oxygen moving to the muscle. C. decrease the amount of blood moving to the muscle. D. increase its lifting capacity. im going with B

**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 learning session in run...

**math**

Mr. Smith currently produces 45,000 bushels of potatoes a year. He Can increase his harvest by an average rate of 3% annually. How many years will it take until he can produce 50,000 bushels per year?

**cosmology**

1.3378e19

**Math**

Find the angel in degrees required to shoot a cannon a distance of 200 yards. It's speed is 400 mps.

**geometry**

Given the equation of the circle (x – 9)2 + y2 = 484 , where is the center of the circle located at?

**science**

which of the following is the best course of action when it comes to using natural resources

**physics**

can someone post the ecuations? thanks

**Math**

Find two numbers the exact answer is between. 6x7381

**Precalculus**

So far i have gotten answers that i already knew. I know that 224=16t^2 goes to 14=t^2 but what squared equals 14?

**Precalculus**

That is my question, i don't know what t equals when 224=16t^2

**Precalculus**

A ball is dropped from a cliff that is 224 feet high. The distance S (in feet) that it falls in t seconds is given by the formula S=16t^2. How many seconds (to tenths) will it take for the ball to hit the ground?

**english**

how do you use atlas in more than one

**tax**

Business Investigation Expenditures. During January and February of the current year, Big Bang LLC incurs $3,000 in travel, feasibility studies, and legal expenses to investigate the feasibility of opening a new entertainment gallery in one of the new suburban malls in town. B...

**pcc**

A volume of 40.0mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 21.7mL of 1.50 M H2SO4 was needed? The equation is 2KOH(aq)+H2SO4(aq)→K2SO4(aq)+2H2O(l)

**math**

What is the unit rate? 1500 meters in 6 seconds?

**finance**

Based on the following information, calculate the coefficient of variation and select the best investment based on the risk/reward relationship. Std Dev. Exp. Return Company A 10.4 15.2 Company B 14.6 22.9

**finance**

Based on the following information, calculate the required return based on the CAPM: Risk Free Rate = 3.5% Market Return =10% Beta = 1.08

**MATH**

THERE ARE 2 SPINNERS ONE IS LABLED A-D THE OTHER IS LABLED 1-8. WHAT IS THE PROBABILITH OF SPINNING EITHER AN A OR B AND EITHER A 1 OR 2. ANSWERS GIVEN ARE 0.0625,0.116,0.125,AND 0.18

**college algebra**

5^n+7+8=

**College Chemistry**

For each trial, enter the amount of heat lost by the calorimeter, qcalorimeter. Be careful of the algebraic sign here and remember that the change in temperature is equal to the final temperature minus the initial temperature. Report your answer using 4 digits. Note, this is 1...

**College Chemistry**

For each trial, enter the amount of heat lost by the calorimeter, qcalorimeter. Be careful of the algebraic sign here and remember that the change in temperature is equal to the final temperature minus the initial temperature. Report your answer using 4 digits. Note, this is 1...

**Math-Statistics**

Assume that 60% of community college students are female. 1) If we pick 10 students at random justify why we can or cannot model this using a normal model. 2) Find the probability that 8 of the 10 students selected are female. 3) Find the probability that 8 of more of the 10 s...

**Statistics**

A study of two groups of children since early childhood: One group of 62 attended preschool. A control group of 61 children from the same area and similar backgrounds did not attend preschool. Over 10 year period as adults, 38 of the preschool sample and 49 of the control samp...

**Chemistry**

1. Which metal is the most easily oxidized? A.) highly active metal *B.) moderately active metal C.) slightly active metal D.) an inactive metal 2. What happens in a voltaic cell? *A.) Chemical energy is changed to a electrical energy. B.) Electrical energy is changed to chem...

**math**

joe draws a line segment 2 1/4 inches long. then he makes the line segment 1 1/2 inches longer. how long is the line segment now?

**Physics please help!!**

Assume a circular orbit. If a planet's distance from it star is multiplied by 25 times, then by how many times is its orbital period T multiplied ?

**Physics please help!!**

A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.23 hours. What is density of the planet? Assume that the planet has a uniform density.

**Physics**

I'm Try a But the b is: ((sigma*x)/(2*epsilon_0))*(1/(sqrt(x^2+R_1^2))-1/(sqrt(x^2+R_2^2)))

**halp!**

what do I use for a and k in this situation? i tried taking the derivative but no answers i come up make sense based on the problem.

**Calculus**

The number, N, of people who have heard a rumor spread by mass media by time, t, is given by N(t)=a(1−e−kt). There are 6 million people in the population, who hear the rumor eventually. If 5% of them heard it on the first day, find the percentage of the population ...

**Math**

The number, N, of people who have heard a rumor spread by mass media by time, t, is given by N(t)=a(1−e−kt). There are 6 million people in the population, who hear the rumor eventually. If 5% of them heard it on the first day, find the percentage of the population ...

**Physics**

(x*Q)/(4*pi*epsilon_0*((R)^2+(x)^2)^(3/2))

**Physics**

and the 2) (B) is 0.5

**Physics**

b) 1283994.39504

**Physics**

c) 46.244

**Physics**

The First is -7.901. Just this in the moment.

**Physics**

A 8.38g bullet is fired into a 4.60kg block suspended as in the figure. The bullet stops in the block, which rises 15.0cm above its initial position. Find initial speed of the bullet.

**haematology**

discuss how the body manages to maintain the cellular components whithin the reference range in an a healthy individual

**Humanities**

What are peer reviewed articles/journals?

**algebra**

what is a subponent

**Chemistry**

well i think it will be 183g

**algebra**

How do you go about solving for x in x/2 + x/3 > 5 ?

**AP Chemistry**

In a ﬁt of boredom, a chemistry teaching assistant swallows a small piece of solid dry ice (CO2). The 8.9 g of dry ice are converted very quickly into gas at 311 K. Assuming the TA’s stomach has a volume of 1.5 L, what pressure is exerted on his stomach?

**math**

if a house square feet is 3,546 sq what is the perimeter of the house

**trigonometry**

5.Find the complete exact solution of sin x = -√3/2. 10. Solve cos 2x – 3sin x cos 2x = 0 for the principal value(s) to two decimal places. 12. Solve tan^2x + tan x – 1 = 0 for the principal value(s) to two decimal places. 19.Prove that tan^2a – 1 + cos^2a...

**accounting**

1,200;300

**geometry**

in DEF, DE=5 and M,D=55. find the nearest tenth

**chemistry**

please explain How % errors would affected the mass/moles of substances in lab?

**SCI/275**

Compare and contrast the western world view with the deep ecology world view. Challenge one of the world views presented in Visualizing Environmental Science. Which world view is closest to your own? Why?

**social studies**

What were the three major cities in the Islamic world?how did each develop and grow to become important?

**problem solving**

An average-size female spider and a large spider can lay a total of 2100 eggs at one time. the large spider lays 20times the number of eggs as the average-size spider. how many eggs does the average sized spider lay

**Algebra**

5-(7/6x)> 7 Subtract both sides by 5 -(7/6x) > 7-5 -(7/6x) > 2 Multiple both sides by -(7/6x) < 2-(6/7) (1/x) < -12/7 x < -7/12 Correction

**Algebra**

5-(7/6x)> 7 Subtract both sides by 5 -(7/6x) > 7-5 -(7/6x) > 2 Multiple both sides by -(7/6x) < 2-(6/7) (1/x) > -12/7 x > -7/12

**college algebra**

The answer is 3. Since the y = -√(x+2) - 9 (-) means reflect by x-axis -9 means 9 units down +2 means shift left 2 units The sign makes a difference For shift if its negative it shift right and positive left.

**chem**

why is hydrogen gas placed in the 1A column of the periodic table?

**math**

Jack and Jill wash a car at the same rate . Working together it takes them an hour and 10 minutes to wash a car. One day jack started washing a car by himself at 2:30 p m. When he was half way done , Jill joined him . What time did they finish washing the car?

**math**

- Juwan and Jake both have money in their pockets. If Juwan gave Jake 15 cent then they both would have the same amount of money. However, if Jake gave Juwan 15 cent , then Juwan would have 5 times as much money as Jake would have. How much money do Juwan and Jake have togethe...

**math**

Wat is the number sequence for 16 18 20 22 24 26 28 30 32 34 36 38 40 42

**math**

i got b. and got it wrong

**math**

The scatter plot shows the study times and test scores for a number of students. How long did the person who scored 81 study? A. 50 minutes B. 81 minutes C. 16 minutes D. 100 minutes helppppppp!!!!!

**Math**

Can someone help me with this math problem? 14 divided by 2 1/3

**math**

on the 1st problem i dont understand how x is being added when the sign is subtraction

**math**

d+3(d-4)=20 please explain

**math**

x-(12-x)=38 please explain

**math**

A college bookstore ordered six boxes of red pens. The store sold 32 red pens last week and 35 red pens this week. Five pens were left on the shelf. How many pens were in each box?

**algebra**

18

**math**

draw a box-and-whisker plot for the following set of data. 62,76,41,87,60,42,47,69,65.

**ALGEBRA**

Yolanda is 180 centimeters tall. How many meters tall is that?

**CHEMISTRY**

HOW MANY GRAMS OF ice at 0oc can be melted into water at 0oc by the additon of 75.0 of heat ? hfus = 6.01 kj/mo

**angular momentum**

a 8.20 kg particle P has a position vector of magnitude 6.90 m and angle θ1 = 42.0° and a velocity vector of magnitude 6.70 m/s and angle θ2 = 25.0°. Force , of magnitude 8.90 N and angle θ3 = 28.0° acts on P. All three vectors lie in the xy plane. A...

**chemistry**

the volume of a gas is 250 mL at 350 kPa pressure. what will the volume be when the pressure is reduced to 50 kPa, assuming the temperature remains constant?

**math**

three coins, a half-dollar, quarter, nickel are tossed at the same time. to say that there is an outcome xyz means that the half-dollar, landed x, the quarter landed y, and the nickel landed z. the eight equally likely possibilites can be listed as follows: HHH HHT HTH HTT THH...

**science-biology**

what do cells do?

**Psyc Research Methods**

Yes, there is

**Ecnomics**

b

**Applied physics**

two men are carrying a 12m uniform ladder on their shoulders. Man A is 1.0m from one end, and man B is 3.0m from the other end. If the beam has a mass of 200kg, determine the load supported by each man.

**chemistry**

Jessica's teacher has asked her to bring her 0.40 moles of sodium chloride to the laboratory. She should bring approximately _______ grams.

**Biology**

Spermatozoa and Oocytes... I thnk it should be that..

**Math**

For a particular mass of gas, the volume (Vcm^3) and pressure (Pcm) of mecury (Hg) are related by P=kV^n, where k and n are constants. Reduce the relation to a linear one and determine the values of k and n given that when v=110cm^3, P=50.3cm and when V=230cm^3, P=18.6cm

**Math**

For a particular mass of gas, the volume (Vcm^3) and pressure (Pcm) of mecury (Hg) are related by P=kV^n, where k and n are constants. Reduce the relation to a linear one and determine the values of k and n given that when v=110cm^3, P=50.3cm and when V=230cm^3, P=18.6cm

**Physics**

A car starts from rest and accelerates uniformly to a speed of 50km/h in 18s. If the wheels of the car are 70cm in diameter. Calculate; a.The final angular velocity of the wheels b.angular acceleration

**Physics**

A mass m=400g hangs from the rim of a wheel of radius r=15cm. When released from rest, the mass falls 2.0m in 6.5sec. Find the moment of inertia of the wheel

**applied physics**

you are standing on a 100m tall buiding above a street and your friend is standing vertically below the building. When you drop a stone, your friend simultaneously throws the identical stone as yours at a speed of 50m/s in the same straight line. Calculate the time taken for t...

**Geometry**

A grid shows the positions of a subway stop and your house. The subway stop is located at (7, -6) and your house is located at (-9, 5). What is the distance, to the nearest unit, between your house and the subway stop

**physics**

a girl lifts a 160-n load a height of 1 m in a time of 0.5 s. what power does the girl produce

**applied math**

Sorry Orbital speed

**applied math**

if the mean radius of the moon is 1.73x10^6m and its mass is 7.35x10^22kg.determin the average speed?

**applied chemistry**

a 69.3g sample of oxalic ac acid, H2C2O4, was dissolved in 1.000L of solution. How would yo prepare 1.00L of 0.150M H2C2O4 from this solution?

**applied chemistry**

M = 0.0285 mols/0.050 L M = 0.57 mols/L thanks i now know the formular bt hey how would u define Molarity and in what part of living does it apply? Am trying to understand it.