# Posts by Melissa

Total # Posts: 1,305

**math**

The value of an investment A (in dollars) after t years is given by the function A(t) = A0ekt . If it takes 10 years for an investment of $1,000 to triple, how many years will it take for the investment to be $9,000? Simplify your answer completely. I am very confused. So ...

*March 10, 2017*

**Psychology**

How do parents influence a child's personality according to each theory: evolutionary, biological/genetic, and behavioral?

*March 1, 2017*

**English 8**

Please check Adverb or Adjective phrase There would always be a perfect understanding between them. Adjective Phrase Her mother said "A person isn't real without a name" Adverb phrase She wins the Rsce, Morning Girl's mother had said a new sister would add ...

*February 13, 2017*

**English 8 Adjective phrase or adverb phrase**

Some wore shiny rocks on their heads. I know on their heads is preposition but confused if it's adjective phrase because it describes rocks or adverb phrase because it answers where rocks were worn. She Wins the Race, Morning Girl's mother, had said a new sister would ...

*February 13, 2017*

**chemistry**

2CH3OH + 3O2-> 2CO2 + 4 H2O wHAT IS THE AMOUNT OF OXYGEN IS REQUIRED TO COMPLETRLY BURN 5 MOL OF METHANOL?

*February 8, 2017*

**electricity**

What resistance must be connected in parallel to 60 ohms to reduce the combined resistance to 15 ohms?

*February 6, 2017*

**Geometry**

What measurements (if any) are associated with each of the following ideas? a point; a line; a union of a square and its interior;and a union of a cube and its interior?

*February 3, 2017*

**Dance**

Describe how would you execute a bend, wiggle, walk, and skip. Also when it comes to The three qualities of energy/movement collapse, explode, and swinging how would you find that in the enviroment. like what is an example of swiming, whats an example of collapse, and whats ...

*February 2, 2017*

**Geography**

According to biocological theory changes in the layers of environment such as ecosystem and macrosystem

*January 31, 2017*

**Math: Geometry**

ok so i am really confused on my assignment. So What we are suppose to do is take pattern blocks (a triangle, square, hexagon, rhombus, trapazoid, and small rhombus) and see how many can go around a central point. I figured out that there are 6 possible solutions for a ...

*January 18, 2017*

**Pre Calc - Probability**

Nvm, I got it! Thanks anyway

*January 11, 2017*

**Pre Calc - Probability**

Let S = {2, 8, 14} be a sample space associated with an experiment. (a) List all events of this experiment. A) {2, 8}, {2, 14}, {8, 14}, {2, 8, 14} B) {2}, {8}, {14}, {2, 8}, {2, 14}, {8, 14} C) {2}, {8}, {14}, {2, 8}, {2, 14}, {8, 14}, {2, 8, D) 14} E) ?, {2}, {8}, {14}, {2, ...

*January 11, 2017*

**Math**

In how many ways can a subcommittee of six be chosen from a Senate committee of four Democrats and six Republicans if (a) All members are eligible? (b) The subcommittee must consist of two Republicans and four Democrats?

*January 10, 2017*

**math**

a shirt is on sale for d dollars the regular price is 4 times as much . Todd has enough money to buy 2 shirts at the regular price. How many shirts can todd buy at the sale price?

*January 9, 2017*

**pre calc**

Formulate but do not solve the problem. Kelly Fisher invested a total of $20,000 in two municipal bonds that have yields of 8% and 9% interest per year, respectively. If the interest Kelly receives from the bonds in a year is $1680, how much did she invest in each bond? (Let x...

*January 5, 2017*

**pre calc**

Formulate a system of equations for the situation below and solve. Michael Perez deposited a total of $3000 with two savings institutions. Bank A pays interest at the rate of 6%/year, whereas Bank B pays interest at the rate of 7%/year. If Michael earned a total of $194 in ...

*January 5, 2017*

**math**

Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. 5/4x ? 2/3y = 8 1/4x + 5/3y = 7 Find the solution, if one exists.

*January 5, 2017*

**math**

Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. 3x ? y = ?3 6x ? 2y = 8 a) one and only one solution b) infinitely many solutions c) no solution can you please show the work

*January 5, 2017*

**Calc 2 Urgent Surface Area of Revolution Question**

why don't you go from 4 to 0 if its around the y-axis?

*December 14, 2016*

**Calc 2 Urgent Surface Area of Revolution Question**

Find the area of the surface generated when y=4x and x=1 is revolved about the y-axis. We have to use the surface area formula of revolution. Integral (2pi*f(x)sqrt(1+f'(x)^2))dx

*December 14, 2016*

**Calc 2 Urgent Surface Area**

Find the area of the surface generated when y=4x and x=1 is revolved about the y-axis. We have to use the surface area formula.

*December 14, 2016*

**Calc 2**

We have to use the Surface area of revolution formula integral(f(x) aqrt(1+f'(x)^2))

*December 14, 2016*

**Calc 2**

Find the area of the surface generated when y=4x and x=1 is revolved about the y-axis.

*December 14, 2016*

**Math**

The statements p ? q and q ? r are given. If we know q is true, is p necessarily true? Explain.

*December 12, 2016*

**Math**

The statements p â†’ q and q â†’ r are given. If we know q is true, is p necessarily true? Explain.?

*December 12, 2016*

**Math**

1.Suppose we are given logic statements p, q, and r. a. If p ? q and p ? r, may we conclude that q ? r? Answer yes or no and give a reason why. b. What is the converse of the following: not p ? not q c. What is the contrapositive of r ? q? d. The statements p ? q and q ? r are...

*December 11, 2016*

**Math**

1.a. 123five + 34five b. 1010two - 101two c. 23five * 34five c. What is the contrapositive of r â†’ q? d. The statements p â†’ q and q â†’ r are given. If we know q is true, is p necessarily true? Explain.

*December 11, 2016*

**Math**

Let A and B be sets. Below are listed several statements involving set notation. For each case, write a statement in words that says what is written in symbols. a. A U B b. A ? B c. A ? B d. a ? A e. A ? B = Ø

*December 10, 2016*

**Chemistry**

I am using 85% ACS grade phosphoric acid. I need to make a 21% phosphoric acid solution with a total volume of 250ml. I have been told that 37ml of the 85% ACS grade phosphoric acid plus 188ml of Deionized water will create the 21% phosphoric acid solution I need to make. I&#...

*December 9, 2016*

**Chemistry**

A recipe calls for 5M of sucrose (C12H22O11) dissolved in 750mL of H2O. Please calculate the total mass (g) of sucrose needed. Show all work.

*December 4, 2016*

**Math**

Ok so in class this is what our teacher had us do.... 1.Pick a number to represent the number of times you would like to have chocolate in a week (more than once, but less than 10 times). 2.Double this amount (just to be bold). 3.Add 5. 4.Multiply the result by 50. 5.If you ...

*November 30, 2016*

**Math**

1.Pick a number to represent the number of times you would like to have chocolate in a week (more than once, but less than 10 times). 2.Double this amount (just to be bold). 3.Add 5. 4.Multiply the result by 50. 5.If you have already had your birthday this year, add 1766. If ...

*November 29, 2016*

**Math**

Lisa went to the store and bought 100 pounds of fruit for $100.00. The peaches were $10.00 a pound, the melons were $3.50 per pound, and the apples were $.50 per pound. How many pounds of each did she buy

*November 22, 2016*

**algebra/pre-calc - please help**

Lines can be used to approximate a wide variety of functions; often a function can be described using many lines. If a stock price goes from $10 to $12 from January 1st to January 31, and from $12 to $9 from February 1st to February 28th, is the price change from $10 to $9 a ...

*November 19, 2016*

**Algebra**

Lines can be used to approximate a wide variety of functions; often a function can be described using many lines. If a stock price goes from $10 to $12 from January 1st to January 31, and from $12 to $9 from February 1st to February 28th, is the price change from $10 to $9 a ...

*November 19, 2016*

**algebra - please help**

Could you please explain what you mean? Do you mean instead of adding like I am to multiply the first 1/x by the ((1/x) - 5)?

*November 15, 2016*

**algebra - please help**

Give an example of a function, f(x), with a domain of (0,5] and a range of [0,?). I've came up with the following. Is this right or do I need to change something? |(1/x) + ((1/x) - 5))|

*November 15, 2016*

**Algebra**

Separate 51 into 2 parts so the second part is 3 more than twice as large as the first part

*November 14, 2016*

**Calc 1**

The function C(m) = -.41m^2 + 6.7m - 44/ .7m represents Miles Traveled per lb. of CO 2 released as a function of speed(in MPH) for a hyundai Sontana. the domain of this function is [10,90]. A) calculate C'(m) B)find the critical points of C(m). C)Where does C(m) have ...

*November 6, 2016*

**Calc 1**

is the answer 3?

*November 6, 2016*

**Calc 1**

A rectangle has one side on the x-axis, one side on the y-axis, one vertex at the orgin ans one on the curve y = e^-3x , for x>(equal) 0. find the maximum area (using calculus)

*November 6, 2016*

**Algebra**

7squrare root of 9+5 (8-3) Please help me figure it out. Thanks

*November 4, 2016*

**Physics**

A force of -9000N is used to stop a 1500 kg car traveling at 20m/s. What braking distance is needed to bring the car to a halt?

*October 24, 2016*

**Algebra**

I purchased a car for $20,000. At year 5 the car was worth $10,000. How much will it be worth at 7years?

*October 19, 2016*

**Chem 205**

A solution of ammonia and water contains 3.50×1025 water molecules and 9.00×1024 ammonia molecules. How many total hydrogen atoms are in this solution? Any help would be appreciated, thank you!

*September 11, 2016*

**chemistry**

From a laboratory process designed to separate water into hydrogen and oxygen gas, a student collected 10.2 g of hydrogen and 66.9 g of oxygen. How much water was originally involved in the process?

*September 1, 2016*

**Algebra**

The larger of two numbers is 5 less than twice the smaller number. The sum of four times the larger and twice the smaller number is 100. If x is the smaller number, which equation below determines the correct value of x? A) 2(2x + 5) + 4x = 100 B) 2(2x – 5) + 4x = 100 C) ...

*August 5, 2016*

**CHEMISTRY**

THIS IS THE 3RD TIME POSTING THIS, PLEASE HELP ME ANSWER THIS THE HOMEWORK IS DUE TONIGHT. Write formulas for the compounds that form from In (Assume In charge is 3+.) and each of the following polyatomic ion: NO−3, SO2−4, PO3−4 -3, -4, -4 ARE THE CHARGES. ...

*June 24, 2016*

**CHEMISTRY**

THIS IS THE 3RD TIME POSTING THIS. PLEASE HELP ME ANSWER THIS. THE HOMEWORK IS DUE TONIGHT. Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. THE -3, -4, -4 ARE THE CHARGES, CANT TYPE SUBSCRIPT ON...

*June 24, 2016*

**CHEMISTRY**

the 3 is the charge

*June 24, 2016*

**CHEMISTRY**

Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. APPARENTLY SrNO6, SrSO4 , Sr3PO8 is wrong

*June 24, 2016*

**CHEMISTRY**

Write formulas for the compounds that form from In and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. (Assume In charge is 3+.) InNo9, InSO6, AND InP4 is wrong

*June 24, 2016*

**CHEMISTRY**

Provide the name of the oxyanion of the acid HNO2(aq) I ENTERED Carbonate ion BUT ITS WRONG

*June 24, 2016*

**CHEMISTRY**

no i don't understand the post below or what one you are referring to. i gave my work in the original posting already.

*June 24, 2016*

**CHEMISTRY**

Write formulas for the compounds that form from In and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. (Assume In charge is 3+.) In(+3 charge) NO3(-1 CHARGE) SO4(-2 charge) P4(-3 charge) Re posting this a little differently. hopefully someone can ...

*June 24, 2016*

**CHEMISTRY**

i posted my work in the original posting

*June 24, 2016*

**CHEMISTRY**

Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO3 −1, SO4 −2, PO4 −3. SR (+3 CHARGE) NO3(-1 CHARGE) SO4(-2 CHARGE) PO4(-3 CHARGE) Re posting this question. hopefully someone can help me answer this now. Please ...

*June 24, 2016*

**CHEMISTRY**

there copied straight from the question page, this is making sense

*June 24, 2016*

**CHEMISTRY**

Write formulas for the compounds that form from In and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. (Assume In charge is 3+.) InNo9, InSO6, AND InP4 is wrong

*June 24, 2016*

**CHEMISTRY**

Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO−3, SO2−4, PO3−4. APPARENTLY SrNO6, SrSO4 , Sr3PO8 is wrong

*June 24, 2016*

**math**

What kind of triangle is (0,0) (4,O) (0,4)

*May 19, 2016*

**geography**

what are the results/effects of poor service delivery socially,environmental and economic problems?

*May 1, 2016*

**Physics**

You are enjoying the frictionless frozen surface of the Rideau canal with your friend. While together, you try a physics experiment in which you push off of each other at the same time. If your acceleration is 2 m/s 2, what is your friend’s acceleration, in m/s 2, if your...

*April 21, 2016*

**Physics**

You and your friend are pulling a 2.5 kg sled across a slightly rough patch on the frozen Rideau canal, such that there is a friction force of 1.5 N opposing the direction of motion. Assume that you each pull the sled forward from either side with the same force of 9.5 N, at ...

*April 21, 2016*

**Physics**

A box is sent up a frictionless inclined (34.2 degrees) plane at an initial speed 3.9 m/s. (a) How much time, in seconds, does it take for the box to stop? (b) How far did the box travel up the plane before it came to a stop?

*April 21, 2016*

**Physics**

While in an elevator, you decide to take some weight readings of yourself to determine the elevator’s acceleration. When the elevator is stopped, you read a weight of 59.2 kg. When the elevator is moving, you measure a maximum weight of 63.5 kg, and a minimum weight of 55...

*April 21, 2016*

**Physics**

An egg is thrown from the top edge of a 22.9 m high building down onto an unsuspecting person standing on the ground 6.2 m from the base of the building. If the egg is tossed horizontally, at what speed, in m/s, must the egg be thrown such that it lands on the person?

*April 20, 2016*

**algebra**

A flagpole has a height of 6565 yards. It will be supported by three cables, each of which is attached to the flagpole at a point 55 yards below the top of the pole and attached to the ground at a point that is 3232 yards from the base of the pole. Find the total number...

*April 10, 2016*

**Math**

Four angles are put together, forming a straight angle. Two of the angles are the same size. The other two angles are also the same size but different from the other two. If one angle of the four angles is 40 degrees, what are the measures of the other three angles

*March 23, 2016*

**Math**

How many posters per minute can each of the student make? Answer:The kids make .05 of poster in 1 minute

*March 8, 2016*

**Calculus - Rates of Change**

I do not understand that.

*March 7, 2016*

**Calculus - Rates of Change**

A water tank has a shape of an inverted cone with a base radius of 2m and a height of 4 m. If water is being pumped into the tank at a rate of 2m3/min, then find the rate at which the water level is rising when the water is 3m deep. Attempted solution: V= 1/3πr^2h V= 1/3...

*March 7, 2016*

**Science**

You are walking on a moving sidewalk (moving at a speed of 2 mph).if you are walking in the same direction as the sidewalk at a speed of 4 mph what is your velocity relative to the ground what would be your velocity if you were walking in the opposite direction as the moving ...

*March 2, 2016*

**Math**

No, your answer is incorrect. It would either have to be (a)Kenya or (b)Matt. :)

*March 2, 2016*

**Math**

You estimate that a puppy weighs 12 pounds. The actual weight of the puppy is 14 pounds. Find the percent error. Round your answer to the nearest hundredth of a percent. Help me Im stuck..!

*February 29, 2016*

**life orientation**

How should i advise a friend who reponds to conflict by avoidance on why it is not healthy in sustaining positive relationships?

*February 25, 2016*

**Marketing**

Thank you

*February 23, 2016*

**Marketing**

distribute the goods

*February 23, 2016*

**Marketing**

Distribution of goods takes place by means of channels, and the intermediaries are the independent groups or organizations within the channel that make the product available for consumption. There are four main types of intermediary: agents, wholesalers, distributors, and ...

*February 23, 2016*

**Marketing**

don't know? Don't understand the question.

*February 23, 2016*

**Marketing**

IT delivers mail and packages from any type of business

*February 23, 2016*

**Marketing**

Please need help with this question. Visit these sites and think about the role that they play in the new breed of channel intermediaries. United Parcel Service Roadway Express

*February 23, 2016*

**geometry**

One leg of an isosceles right triangle measures 5 inches. Rounded to the nearest tenth, what is the approximate length of the hypotenuse?

*February 19, 2016*

**Maths**

The triangle is called ABC. Angle B has an angle of 90 degrees. The length of AB is 15mm and the length of BC is 16mm. Find the length of AC

*February 17, 2016*

**english**

Punctuation for The student asked will my learning pattern scores change over my lifetime

*February 2, 2016*

**Science**

When I took it and used the answers above I got a F. The right answers are. 1.B 2.D 3.C 4.B 5.D 6.A 7.C 8.B-Nickel, D-rust 9.A 10.B-boiling a mixture, D-using a filter

*January 28, 2016*

**geography**

What are three characteristics that mid-latitude cyclones have in common with all cyclones?

*January 23, 2016*

**language arts**

They felt free when they ran though the doors.

*January 21, 2016*

**Chem - pH curve**

Sketch what the pH curve for soil containing carbonate ion that undergoes continual addition of hydronium ions from acid deposition. Include relevant chemical equations and information that explain the aspects of the ph curve you sketch. Please help!!

*January 13, 2016*

**Algrebra**

Given that a(x+7)=24, which expression is equivalent to x? A. 24/a-7 B.24-7/a C. 24/a -7 D. 24-7/a

*January 4, 2016*

**Math**

If 36 in. = 1 yd, then 2 1/3 yd =

*December 9, 2015*

**Math please helppp**

1 Find the missing angle measure in the polygon A ] 77 B ] 87 C ] 97 D ] 107 i think its b 2 Find the sum of the interior angles in 10 - sided polygon A ] 1,260 B ] 1,440 c ] 1,620 d ] 1,800 i think its c or b 3 Find the measure of each interior angle in a regular hexagon A ] ...

*December 4, 2015*

**Math**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 170 and a standard deviation of 5. We find the heights of 60 people. (You may need to use the standard normal distribution table. Round your answers to the nearest whole number.) (a) ...

*December 1, 2015*

**Math**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 16. The material is considered defective if the breaking strength is less than 156.2 pounds. What is the probability that a single, randomly selected ...

*December 1, 2015*

**Math**

The diameter of an electric cable is normally distributed, with a mean of 0.6 inch and a standard deviation of 0.03 inch. What is the probability that the diameter will exceed 0.63 inch? (You may need to use the standard normal distribution table. Round your answer to three ...

*December 1, 2015*

**Math**

An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula: N = 1,600 + 300 ln a (a ≥ 1). How much needs to be spent (to the nearest hundred dollars) to sell 4...

*November 24, 2015*

**Math**

Find the sum of the first five terms of a geometric series with g1 = -16, g5 = -38,316, and r = 7.

*November 22, 2015*

**Math**

Evaluate the series 12.1 + 13 +13.9 +...+ 32.8.

*November 22, 2015*

**Math**

The 1st term of a geometric sequence is 25 and the 6th term is -1/125. What is the 3rd term?

*November 22, 2015*

**Physics**

Two vectors F1 and F2 with magnitude F1=42N and F2=70N and where angle1=83 and angle2= 300. The angles are measures from the positive x axis with the counter-clockwise angular direction as positive. What is the magnitude of the resultant vector where F=F1+F2?

*November 18, 2015*