Friday

February 24, 2017
Total # Posts: 857

**physics**

Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. (a) Calculate the speed of a 94-kg ...

*December 6, 2012*

**physics**

An airplane flies due south at 185 km/h relative to the air. There is a wind blowing at 68 km/h to the east relative to the ground. What are the plane's speed and direction relative to the ground?

*December 6, 2012*

**physics**

Tom has a mass of 69.0 kg and Sally has a mass of 54.0 kg. Tom and Sally are standing 20.0 m apart on the dance floor. Sally looks up and sees Tom. She feels an attraction. If the attraction is gravitational, find its size. Assume that both Tom and Sally can be replaced by ...

*December 3, 2012*

**physics**

Two balls have their centers 2.0 m apart. One ball has a mass of m1 = 8.3 kg. The other has a mass of m2 = 5.9 kg. What is the gravitational force between them? (Use G = 6.67 10-11 N · m2/kg2.)

*December 3, 2012*

**Chemistry**

Got it and Thank you everyone!

*November 22, 2012*

**Chemistry**

Tried with Image One:[(1/2)(1/2ˉ)1ˉ] Image 2:(1ˉ02) but got it wrong! any idea what it is!

*November 22, 2012*

**Physics**

A 225-kg crate is pushed horizontally with a force of 690 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.

*November 17, 2012*

**English 3**

Young Goodman Brown is a dynamic character TRUE OR FALSE

*November 7, 2012*

**college algebra**

An open box is made from a square piece of cardboard 20 inches on a side by cutting identical squares from the corners and turning up the sides.(a) Express the volume of the box, V , as a function of the length of the side of the square cut from each corner, x. (b) Find and ...

*September 27, 2012*

**College Algebra**

You plan to invest $12,000 in two funds paying 41/2% and 5% simple interest. (There is more risk in the 5% fund.) Your goal is to obtain a total annual interest income of $580 from the investment. What is the smallest amount you can invest in the 5% fund and still meet your ...

*September 11, 2012*

**math**

A delicatessen serves 10 kinds of sandwiches and 5 kinds of chips. How many different sandwich and chip lunches can they make if each lunch has one sandwich and one bag of chips?

*September 1, 2012*

**math**

Solve the problem.A collection of dimes is arranged in a triangular array with 14 coins in the base row, 13 in the next, 12 in the next, and so forth. Find the value of the collection.

*September 1, 2012*

**math**

If the answer is an amount of money, round to the nearest dollar.Maria has saved $420 at a bank. She wants to accumulate $1250 to attend computer camp. What percent of her goal has been reached?

*August 30, 2012*

**math**

What is the angle sum of a regular polygon with 7 sides

*August 30, 2012*

**math**

make a tally and a frequency table for the number of books read by students during the summer: 4, 5, 7, 2, 4, 5, 6, 7, 8, 4, 5, 3. how many students took part in this survey?

*August 27, 2012*

**math**

Attach 6 trapezoids to one hexagon for each figure Figure 1: One line of symmetry and no rotational symmetries (other than 360 degrees)

*August 26, 2012*

**math**

so draw my body?

*August 26, 2012*

**math**

One line of symmetry and no rotational symmetries (other than 360 degrees) im supposed to draw this but idk what it is

*August 26, 2012*

**math**

what is the diffrence between .5 percent and 50 percent

*August 12, 2012*

**Math**

if the ratio of the girls to boys in a classroom is 2 to 3 why isnt it correct to say 2/3 (two thirds) of the class are girls.

*August 12, 2012*

**Chem**

The molecular weight of CaCl2 is 110.98 g/mol. In order to make up 500.0 ml of a 0.500 M solution, you need how many g?

*July 26, 2012*

**physics**

A 55 kg hiker starts at an elevation of 1600 m and climbs to the top of a 3400 m peak. (a) What is the hiker's change in potential energy?

*July 9, 2012*

**maths**

suers!!

*July 9, 2012*

**Algebra**

well did u know u should find something called a tutor program to help you? IDIOTS!!!!

*July 5, 2012*

**gen chem**

moms?

*June 10, 2012*

**gen chem**

The recommended dosage of iodine-131 is uCi/kg of body weight. How many microcuries of iodine-131 are needed for a patient with the hyperthyroidism?

*June 10, 2012*

**Algebra II**

The first 3 terms in a geometric sequence are 1.1, 1.65, and 2.475. Part A: What is the sum of the first 6 terms of the sequence? Show your work. Part B: How does the sum of the series differ from the 6th term? Explain. Part C: If the nth term in this sequence represents the ...

*May 27, 2012*

**ALGEBRA**

Suppose you have a $1,000 charge on a credit card charging 1.5% monthly interest using the adjusted balance method. The minimum payment due in May is $20. How much will you save in interest charges in June by paying $40 instead? I had $8,234.65

*May 27, 2012*

**ALGEBRA**

Find the ending balance in an account that opens with $5,000, earns 7.5% interest compounded quarterly, and is held for 20 years. (Round your answer to the nearest cent.)

*May 27, 2012*

**ALGEBRA**

A certain lock has four tumblers, and each tumbler can assume three positions. How many different possibilities are there?

*May 27, 2012*

**ALGEBRA**

A car dealer will sell you a used car for $6,162 with $162 down and payments of $214.67 per month for 36 months. What is the simple interest rate? (Round each answer to the nearest tenth.)

*May 27, 2012*

**ALGEBRA**

Answer the question and tell whether it illustrates inductive or deductive reasoning. (a) What is the 50th consecutive even number?

*May 27, 2012*

**ALGEBRA**

Find the amount of compound interest earned in an account that opens with $23,000, earns 3.9% interest compounded daily, and is held for 15 years. Assume 360 days in a year. (Round your answer to the nearest cent.)

*May 27, 2012*

**ALGEBRA**

An oil-drilling company knows that it costs $28,000 to sink a test well. If oil is hit, the income for the drilling company will be $445,000. If only natural gas is hit, the income will be $145,000. If nothing is hit, there will be no income. If the probability of hitting oil ...

*May 24, 2012*

**ALGEBRA**

Evaluate the expression. \( _3^12 \)

*May 23, 2012*

**ALGEBRA**

Evaluate the expression. \( _3^10 \) \( _4^5 \) \( _1^4 \)

*May 23, 2012*

**Algebra II**

A cowboy is practicing his lassoing technique by lassoing the fence posts at his ranch. Consider that is lariat forms a perecly elliptical shape centered at the origin while he twirls it. If the fence posts are 2 inches in circumference and the cowboy would lik to add 5 inches...

*May 23, 2012*

**SUPER URGENT-- CHEMISTRY**

1. .0025 M tartric acid completely reacts with .0030 m of al bicarbonate if .913 l of co2 forms at 298 k with pressure of 1.4 ATM how much base used? 2. 3.1 x 10^23 molec of .0035 m hydriodic acid reacts with 25 g of magnesium bicarbonate how much carbon dioxide if at stp? 3. ...

*May 21, 2012*

**Chemistry**

URGENT!!!!! 4 questions total! 1. .0025 M tartric acid completely reacts with .0030 m of al bicarbonate if .913 l of co2 forms at 298 k with pressure of 1.4 ATM how much base used? 2. 3.1 x 10^23 molec of .0035 m hydriodic acid reacts with 25 g of magnesium bicarbonate how ...

*May 21, 2012*

**maths**

1.) 7:15

*May 21, 2012*

**stuck**

a.) as x increases by one, you multiply by the next multiple of 3 to get y. 1x3=3, 2x6=12, 3x9=27, etc. b.) if x=5 then y=75

*May 21, 2012*

**algebra 2**

-160, 320, -640, 1,280, -2,560, 5,120, -10,240, 20,480, -40,960, 81,920, -163,840 16th term = -163,840

*May 21, 2012*

**Chemistry**

In a 0.05M solution of a weak monoprotic acid,[H+]=.0018.What is its Ka?

*April 27, 2012*

**algabra**

find given the funcrion k described by k(x) =12x, find each of the following (a) k(-19),(b0 K (10)(c) k(21),k(-19)=

*April 13, 2012*

**math:(**

uhh idk i tink it divide but idk haha did u gt it rite/?

*April 6, 2012*

**ENGLISH: types of business writing**

Can someone check gammar, punctuatiion and structure please. Draft an email of at least four complete sentences to Deb Walker the designated trainer: Confirm the arrangements for the seminar providing only the information she needs to arrive at the right place at the right ...

*April 4, 2012*

**ENGLISH: types of business writing**

Changed Dear Deb: I am confirming my understanding of our arrangements as we discussed for a seminar to be held at Broadworth General Hospital on sexual harassment and unlawful discrimination in the workplace. The date is to be July 20, 2012 at 9 am in conference room 200, on ...

*April 4, 2012*

**ENGLISH: types of business writing**

How does the rest sound?

*April 4, 2012*

**ENGLISH: types of business writing**

Draft an email of at least four complete sentences to Deb Walker the designated trainer: Confirm the arrangements for the seminar providing only the information she needs to arrive at the right place at the right time. Copy both to Mr, Dittmer and Ms. Hopkins Create an ...

*April 4, 2012*

**ENGLISH Types of business writing**

Thanks a bunch.

*April 4, 2012*

**ENGLISH Types of business writing**

REVISED We have received confirmation from Jeremy Dittmer for our seminar to be held on July 20, 2012. The trainer selected is Deb Walker. Deb will proceed to the conference room at 9 am the day of the session to set up before supervisors arrive. The conference room reserved ...

*April 4, 2012*

**ENGLISH Types of business writing**

Assume that you’ve worked for the last five years as an administrative assistant for the Human Resources Department of Broadworth General Hospital. The Director of Human Resources, Miriam Hopkins, has charged you with organizing a two-hour training seminar to be attended ...

*April 4, 2012*

**math**

A number from 11 to 24 is drawn at random. What is the probability that 18 is drawn? Write your answer as a fraction. A) 1/7 b) 1/14 C) 11/24 D) 18/14

*April 3, 2012*

**ENGLISH Types of business writing**

Assume that you’ve worked for the last five years as an administrative assistant for the Human Resources Department of Broadworth General Hospital. The Director of Human Resources, Miriam Hopkins, has charged you with organizing a two-hour training seminar to be attended ...

*April 3, 2012*

**ENGLISH : Types of business writing**

Thanks so much.

*April 3, 2012*

**ENGLISH : Types of business writing**

Assume that you’ve worked for the last five years as an administrative assistant for the Human Resources Department of Broadworth General Hospital. The Director of Human Resources, Miriam Hopkins, has charged you with organizing a two-hour training seminar to be attended ...

*April 3, 2012*

**ENGLISH Types of business writing**

How does this sound? Dear Mr. Dittmer: I am requesting a trainer for our seminar on sexual harassment and unlawful discrimination in the workplace for twenty of our office supervisors. Our company would like to take this opportunity to thank you for Wydade’s reliable ...

*April 2, 2012*

**ENGLISH Types of business writing**

Dear Mr. Dittmer: I am writing to request a trainer for our seminar on sexual harassment and unlawful discrimination in the workplace for twenty of our office supervisors. Our company would like to take this opportunity to thank you for Wydade’s reliable support in ...

*April 2, 2012*

**ENGLISH Types of business writing**

Assume that you’ve worked for the last five years as an administrative assistant for the Human Resources Department of Broadworth General Hospital. The Director of Human Resources, Miriam Hopkins, has charged you with organizing a two-hour training seminar to be attended ...

*April 2, 2012*

**Improving your writing**

Need help with grammar, punctuation, paragraph structure. Thank you

*March 28, 2012*

**Improving your writing**

Need help with grammar, punctuation,

*March 28, 2012*

**Improving your writing**

BACKGROUND: Ten years ago, I started working as a clerk for DMD Medical Supplies. Six months ago, Liz, the human resources director, promoted me to office manager. I manage two employees: Jack and Ruth. My office provides secretarial support for the four members of the ...

*March 28, 2012*

**Paragraph Writing**

BACKGROUND: Ten years ago, I started working as a clerk for DMD Medical Supplies. Six months ago, Liz, the human resources director, promoted me to office manager. I manage two employees: Jack and Ruth. My office provides secretarial support for the four members of the ...

*March 28, 2012*

**Chem**

The actual heat of formation of MgO is -601.8 kJ/mol. Convert this to kcal/mol and calculate your % error. And list two possible sources of procedural error to account for this percentage.

*March 18, 2012*

**physics**

The figure is taken from a paper (Am J Sports Med 2004 32: 477) on injuries to the anterior cruciate ligament due to forces applied by the patella tendon. Take a particular case where the attachment force on the tibia is 5610N when the leg is oriented with patella tendon ...

*March 7, 2012*

**AP CHEMISTRY**

Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 0.080 M NaOH. a)hydrobromic acid (HBr) b)chlorous acid (HClO2) c)benzoic acid (C6H5COOH)

*February 29, 2012*

**Calculus: Implicit**

1/2 √(3(6)+2(2)) * 3(2(2))+ 1/2 √(4(6)(2)) * 4(2)+2(6) right?

*February 28, 2012*

**Calculus: Implicit**

so i suppose to find slope. i have trouble this problem. my math book is not really clear. Find the slope of the tangent line to the curve √(3x+2y)+√(4xy)=11.6 at the point (6,2). √(3x+2y) is the square root(3x+2y) √(4xy)is the square root 4xy.

*February 28, 2012*

**Calculus Help!**

my answer was -40cos(sincos(x^5) right?

*February 28, 2012*

**Calculus Help!**

1. 8sin(cos(x^6)), find f'(x) 2. cos(sin(x^2)), find f'(x).

*February 28, 2012*

**Calculus. I need help!**

my worksheet say sin^5 x. well thanks

*February 28, 2012*

**Calculus. I need help!**

If f(x)=sin^5x, Find f'(x) i don't know im doing right way f'(x)= 5cosx * sin(x)

*February 28, 2012*

**Calculus. I need help!**

Write the composite function in the form f(g(x)). [Identify the inner function u=g(x) and the outer function y=f(u).] Then find the derivative dy/dx. y=√sinx √ is square root.

*February 25, 2012*

**Calculus 1 need help!**

Write the composite function in the form f(g(x)). [Identify the inner function u=g(x) and the outer function y=f(u).] Then find the derivative dy/dx. y=√sinx √ is square root.

*February 25, 2012*

**calculus 1 help!!**

If f(x)=(4x+8)^-2, Find f'(x)

*February 25, 2012*

**physics**

What are the mass and the atomic number for the anion of Cl 35?

*February 18, 2012*

**Chemistry**

KI+H2SO4 Write the balanced net ionic equation.

*February 17, 2012*

**physics**

What are the mass and the atomic number for the anion of Cl 35?

*February 17, 2012*

**math. need help**

United States citizens living in Switzerland must pay taxes on their income to both the United States and to Switzerland. Suppose that the United States tax is 28% of their taxable income after deducting the tax paid to Switzerland. Suppose that the tax paid to Switzerland is ...

*February 14, 2012*

**algebra 2**

can someone help me simplify 3/4i

*February 8, 2012*

**math**

Mary's test grades were 73, 86, 89, 84, and 86. Mary's teacher recorded one of her grades incorrectly. Instead of an 86, Mary's second test score should have been an 84. Which measure(s) of central tendency are affected by this change?

*February 8, 2012*

**Pre-cal**

How do I find the reference angle in radicals given the value of cosecant 5 pi/6?

*February 1, 2012*

**math**

Which of the following is the solution to the matrix equation below? [0 9 2] [18] [3 2 1] x=[5] [1 -1 0] [-1] a) [-3 -2 18] b) [-3 2 -18] c) [-3] [-2] [18] d)[-3] [2] [-18]

*January 25, 2012*

**math**

Use (Triangle) PQR with coordinates P(2, –1), Q(0, 5), and R(–2, 0). Which matrix expression can be used to translate (triangle)PQR 1 unit left and 3 units up?

*January 25, 2012*

**Math**

it costs $175 to rent a jet ski for 2 hours. it costs $300 to rent a jet ski for 4 hours. write an equation that represents y (in dollars) of renting a jet ski for x hours.

*January 23, 2012*

**math**

thanks for all help Ms.Sue.

*January 6, 2012*

**math**

Renter’s Insurance protects a person who is renting an apartment from losses or damages that can occur in the apartment setting. Give two examples of things that could happen in an apartment that would be protected by having renter’s insurance.

*January 6, 2012*

**math**

x^2+6x=24

*December 19, 2011*

**algebra**

Sam's plasma tv has a 14inby18in screen and border. The total area of the tv 480inch^2. How wide is the trim

*December 14, 2011*

**Physics**

What is the electric field midway between an electron and a proton separated by 0.7 nm?

*December 5, 2011*

**Physics**

What is a magnetic field of 950 G expressed in tesla?

*December 5, 2011*

**Physics**

A merry-go-round is a common piece of playground equipment. A 2.4 m diameter merry-go-round with a mass of 300 kg is spinning at 22 rpm. John runs tangent to the merry-go-round at 5.0 m/s, in the same direction that it is turning, and jumps onto the outer edge. John's mass...

*December 2, 2011*

**Physics**

A 340 g bird flying along at 6.0 m/s sees a 14 g insect heading straight toward it with a speed of 30 m/s. The bird opens its mouth wide and enjoys a nice lunch. What is the bird's speed immediately after swallowing?

*November 29, 2011*

**Physics**

find the electrostatic potential, and then the electric field a distance z above the centre of a circular loop of radius r, which carries a uniform line charge (lamda)

*October 13, 2011*

**math**

draw a square that measures 5 units on each side

*October 12, 2011*

**physics**

A variable-speed drill, initially turning at 500 rpm, speeds up to 1300 rpm in a time interval of 0.8 s. What is its average rotational acceleration?

*October 10, 2011*

**Chemistry**

Is BCI3 polar or non polar ,identify the negative ends

*October 10, 2011*

**Physics**

the answer is 8 = D ~

*September 15, 2011*

**physics**

v=1.00m/s + 2.0m/s = 3.0 m/s t = 150.0m/3.0 m/s = 50s

*September 13, 2011*

**physics**

A locomotive is accelerating at 2.0 m/s2. It passes through a 20.0-m-wide crossing in a time of 2.8 s. After the locomotive leaves the crossing, how much time is required until its speed reaches 36 m/s?

*September 10, 2011*