# Posts by maria

Total # Posts: 1,981

**Geometry**

On the scale drawing of a floor, plan A room is 7 in. long on the scale drawing. Find the actual length of the room.

*March 25, 2017*

**Physical science**

Calculate the mass of carbon monoxide that was needed to produce 78 grams of methanol by the following reaction: 2H2+CO=CH3OH

*March 23, 2017*

**Physical science**

Determine the number of moles of sodium hydroxide produced when 2 moles of sodium and 3 moles of water react to form sodium hydroxide and hydrogen gas.

*March 23, 2017*

**biochemistry**

What is the concentration of H+ in a solution of 0.2 M NaOH? i got [H+] = 5x10^-14, is this correct? all i did was [H+][OH-] = Kw

*March 18, 2017*

**calculus**

The region bounded by the given curves is rotated about the specified axis. Find the volume V of the resulting solid by any method. y = ?x2 + 7x ? 12, y = 0; about the x-axis

*March 14, 2017*

**calculus**

Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. y = 4x ? x2, y = 3; about x = 1

*March 13, 2017*

**Algebra**

Factor: 2x^2 +13x-6 Please give step by step directions. I have tried doing it, but I can't get the right numbers. Thanks!

*March 13, 2017*

**Physics**

A 23.7 kg child, with a 4.35 kg backpack on his back, first stands on a sidewalk and then jumps up into the air. Find the net force (positive up/negative down) on Earth due to the child when the child is (c) standing still and (d) in the air.

*March 5, 2017*

**math**

L=5feet,w=5feet

*March 2, 2017*

**physics**

I think that the answer is 1.8 3.6/2(for the time it toke to go up then back down)=1.8 I am only in 7th grade so i am just guessing hope this is the right answer though :)

*February 11, 2017*

**math**

thank you Reiny

*February 11, 2017*

**math**

A rope goes from one building to another. The distance between the buildings is 10m, and the rope is tied at each building at a point 8m and 4m from the ground. Find the length of the rope.

*February 11, 2017*

**Effective Learning Environment**

is this a real classroom?

*February 11, 2017*

**Effective Learning Environment**

i would pick either c or d

*February 11, 2017*

**Math**

i was just trying to help :( and i also did not guess and apparently got the right answer i found the area of the cycle then the cylinder

*February 11, 2017*

**Math**

i think that the area is 213.63

*February 11, 2017*

**math**

didn't i get the right answer

*February 11, 2017*

**math**

List the sides of triangle ?MNP in ascending order (shortest to longest) if: m?M = 64°, m?N = 48°, for this one i am not sure if your supposed to find the third angle and or the third side can you guys explain and show me the answer i got 132 degrees but can't find...

*January 28, 2017*

**math**

In an isosceles triangle, the perimeter is 75 cm and one of the sides is 25 cm. Find all its sides. Can you find all angles of the triangle? Explain your answer.

*January 28, 2017*

**Trig/PreCalc**

Find the interior angles of the triangle with vertices (-4,1), (1,-6), and (5,-1)

*January 10, 2017*

**math**

if 5 people want to share a 2 pound sack of potato chips equally by weight, how many pounds of potato chips should each person get?

*January 4, 2017*

**Math**

A ball is dropped from a height of 16 feet and always rebounds 0.25 of the distance fallen.How high did it rebound the 5th time?

*December 30, 2016*

**Chemistry**

Hi, How do you know how many ligands a metal ion needs to form a complex ion? So for example, with (Fe(H20)6)2+, how am I supposed to know that the Fe needs 6 H20's, rather than 4? Thank you!

*December 22, 2016*

**math**

what will it be??

*December 20, 2016*

**math**

determine which ordered pair is not a solution of y = -5x -4 (10, -52) (7,-39) (-7, 31) (8,-44)

*December 20, 2016*

**math**

thanks i will

*December 16, 2016*

**math**

i dont really get it :/

*December 16, 2016*

**math**

What is the monomial if a cube of a monomial is:1/8 a^27

*December 16, 2016*

**math**

4/9 b^6 writes as a square of a monomial is it (4/9 b^6)/2

*December 16, 2016*

**Algebra**

kx^2-3k+5=0 find the solutions (roots)

*December 12, 2016*

**Math**

My sister is 8 years older than I am. The sum of our ages is 26. Find our ages

*December 10, 2016*

**geometry**

thanks :) :D

*December 9, 2016*

**geometry**

Prove that the angle bisectors of the base of the isosceles angles of the isosceles triangle are congruent using statement and reason proof i dont really now how to prove this problem but i now what a transversal is and the angles of a trashes line. can u guys plz solve and ...

*December 9, 2016*

**math**

thank you !!!!!!!!!!! :)

*December 9, 2016*

**math**

find the image of S(-1,-3) after a reflection scross the line y=-2

*November 17, 2016*

**Office finances**

6. What must a depositor add to a check before the bank will accept it for deposit? A. Cancel B. Void C. Endorsement D. Date of deposit

*November 16, 2016*

**chemistry**

Pl help...what are the isomers of chlorodibromobenzene

*November 15, 2016*

**chemistry**

what are the isomers of chlorodibromobenzene

*November 15, 2016*

**Chemistry**

What are the isomers of chlorobromobenzene

*November 15, 2016*

**Physics**

If you reduce the distance between two point charges to one third of the original distance, the electromagnetic force changes by a factor of:

*November 14, 2016*

**accounting**

provided accounting services to dress shop $8,500. payment to received on july 9th how would this journal entry be posted to the general journal.

*November 13, 2016*

**Accounting**

Rented an office and paid three months rent in advance to property Management check #001 $4,500. How would this journal entry be posted to the general journal.

*November 12, 2016*

**accounting**

Invested $19,000cash in the business along with $6,000 of office equipment. How would this journal entry be posted to the general journal.

*November 11, 2016*

**intermediate algebra**

a cyclist bikes at a constant speed for 19 mile. He then returns home at the same speed but takes a different route. His return trip takes one hour longer and is 24 miles. Find his speed

*November 8, 2016*

**Math HELP HELP**

Express the following in completed square form. x^2+4x-41

*November 8, 2016*

**social studies**

how did the siege at the Alamo influence the response of the Texas settlers? it force them to recruit native Americans it forced them to surrender it strengthened their resolve to fight*** it prompted them to have public forums

*November 4, 2016*

**precalculos**

The cost C of producing x thousand calculators is given by the following equation. C=-15.2x^2+15,990x+580,000(x??175) Find the average cost per calculator for each of the following production levels. 40,000?; 60,000? and 175,000

*November 3, 2016*

**Chem**

A gas is used to fill a container up, there are 17.8 moles. What will be the new volume of the gas in the container at STP? (I don't understand which gas law to use)

*October 28, 2016*

**Biology**

Here are parts of the DNA base sequences for 7 organisms: Organism 1: GCCTAGGCATTACGCTACGTCGCATTATAC Organism 2: GCTAAGGCACTACGCTACGTCGCTTAATAG Organism 3: GCTAAGCACTACGCTACGTCGCTTAATAGC Organism 4: GCTAAGGCACTACGCTACGTCGCATTATAC Organism 5: GCCAAGGCACTACGCTACGTCGCATTATAC ...

*October 28, 2016*

**Math**

Suzanne bought 50 apples at the apple orchard. She bought 4 times as many red apples as green apples. How many more red apples than green apples did Suzanne buy?

*October 27, 2016*

**El Paso Community College**

What are the joules needed to melt 50.0g of ice at 0 degree C and to warm the liquid to 65.0 degree C?

*October 27, 2016*

**maths percentage**

in a 400ml can of mixed juice, 41% is MAngo Juice, 3205% is pineapple juice and the rest is water. find the volume of Mango, pineapple and water ?

*October 23, 2016*

**Chemistry**

1.15gm

*October 22, 2016*

**Chemistry**

A chemist reacted 0.05 mol of sodium with water to form 50cm3 of sodium hydroxide what was the mass of sodium reacted Na+h2p-Noah+h2

*October 22, 2016*

**Math**

I walked 2/7 of a mile in 4/9 of an hour. at this rate, how far will I have traveled after an hour?

*October 14, 2016*

**History Social studies**

1. Which activity is part of both private and civic life? (1 point) learning about politics •• voting for a candidate going to sports games working at a bookshop 2. Why are elections necessary for good governance? (1 point) Elected officials can be fired at any time...

*October 13, 2016*

**Math**

A situation that could describe the ratio 52 to 12.

*October 13, 2016*

**Social studies**

Warsaw Pact United Nations<-- League of Nations British commonwealth North Atlantic treaty organization <--

*October 12, 2016*

**Social studies**

To which internatinal associations does the United States belong to?

*October 12, 2016*

**History**

Of the following choices which ones are considered democratic values? Select all that apply A. Serving in the military*** B. Honesty C. Patriotism D. Voting in an election ••

*October 12, 2016*

**Algebra**

Identify and interpret the decay factor for each of the following. a.) P= 400×(0.43)^t decay factor: 0.43 This means that the function decays by ___?___ % b.) f(t)= 3800×(0.84)^t decay factor: 0.84 This means that the function decays by ___?___ % c.) y= 21×(2...

*October 12, 2016*

**English**

No I don't know them.

*October 8, 2016*

**English**

The other questions didn't tell me the answers to these questions. Thank you for the suggestion though.

*October 8, 2016*

**English**

Need these answered soon please! 10. The author of “My Brother’s Keeper” emphasizes Jamie’s conflict by describing the car accident in detail.*** detailing Jamie’s physical appearance and good grades. flashing back to earlier events with ...

*October 8, 2016*

**Math precalculus**

The revenue for a sale of x books at $80 each is given by R(x) = 80x. The commission for a revenue of x dollars is given by C(x) = 0.30x. Express the commission as a function of the number of books sold

*October 2, 2016*

**American government**

how does the president limit the legislative power of congress. a- by appointing congressional committee chairs b- by appropriating congressional spending c- by administering the law d- by using the veto

*September 30, 2016*

**Georgia History**

1. At which meeting was Georgia not represented? A.) Provincial Congress B.) First Continental Congress C.) Second Continental Congress D.) Council of Safety I think B Please help asap :)

*September 27, 2016*

**math**

write a program that takes an integer n and output the largest odd divisor of n

*September 27, 2016*

**Chemistry**

Dr. Bob222 I still didn't understand which is the reduction half reaction and its products and oxidation half reaction...and why is it O3 to IO3-...0 to -6 and then Please help...entrance exam soon Write the oxidation and reduction half reactions(showing e- lost or gained...

*September 26, 2016*

**chemistry**

Calculate energy change that produced the 4th line in lyman series

*September 26, 2016*

**Chemistry**

Please help...entrance exam soon Write the oxidation and reduction half reactions(showing e- lost or gained) for the foll O3 + I- -> IO3- + O2 (acidic)

*September 24, 2016*

**Math**

It's a riddle question. All six digits in the number even remember that zero is an even number one digit is use once and all the other digits is used twice is four times the hundreds digit 10 digit is the difference of the ones digit in the hundred digit is the same digit ...

*September 21, 2016*

**Math**

It's a riddle question. All six digits in the number even remember that zero is an even number one digit is use once and all the other digits is used twice is four times the hundreds digit 10 digit is the difference of the ones digit in the hundred digit is the same digit ...

*September 21, 2016*

**Math HELP HELP**

(a+4b,a-b) and (a-3b,a) find the length of the line segment joining this pair of points.

*September 21, 2016*

**Math**

(a+4b,a-b) and (a-3b,a) find the length of the line segment joining this pair of points.

*September 20, 2016*

**Culturel Diversity**

Talking the talk emphasizes the use of lableing individuals positivly

*September 18, 2016*

**Chemistry**

CHCl3 + MnO4- = Cl2 + CO2 + Mn+2 Balance the above with half reactions in acidic medium. For the above reaction, can you please show the half reactions...which is getting oxidised...both C and Cl's oxidation # are changing showing both getting oxidised,.how is this ...

*September 16, 2016*

**CHEMISTRY**

BALANCE THE REDOX REACTION USING HALF CELL METHOD IN AN ACIDIC MEDIUM CHCl3 + MnO4- = Cl2 + CO2 + Mn+2

*September 15, 2016*

**Chemistry**

Half reaction method of balancing redox reaction CHCl3 + MnO4- = Cl2 + CO2 + Mn+2

*September 15, 2016*

**Math**

24 dogs line up for breakfast. The first cat eats one fish, the second cat eats two fish, and so on, with each cat eating one more fish than the one before it. How many fish are eaten in total.

*September 15, 2016*

**Social studies**

Type of American Indian dwelling in the Eastern Woodlands

*September 12, 2016*

**English**

Man-Made

*September 12, 2016*

**chimistry**

natriumsaltet

*September 10, 2016*

**chimistry**

hvorfor løsligheten av natriumsaltet til salsyre vann

*September 10, 2016*

**chemistry**

a) What is fellesioneffekten? Veronal is a barbiturate (structure see above). Barbiturates is a substance class which occur in a variety of drug classes, including sleep medications (hypnotikasedativa), in painkillers (anesthetics) and anticonvulsants. A barbiturate is ...

*September 9, 2016*

**chemistry**

a) What is fellesioneffekten? Veronal is a barbiturate (structure see above). Barbiturates is a substance class which occur in a variety of drug classes, including sleep medications (hypnotikasedativa), in painkillers (anesthetics) and anticonvulsants. A barbiturate is ...

*September 9, 2016*

**chemistry**

In quality control of raw materials for pharmaceutical production often used foul reactions to prove that raw materials in salt form containing the appropriate salt. Hydrochloride (eg. Amitriptyline hydrochloride) can be detected for example by precipitating the chloride ions...

*September 9, 2016*

**chemistry**

Cocaine is a weak base (Figure see below) with pKb = 5.59. Cocaine has local anesthetic effect (local anesthetic) but is also a narcotic. a) Calculate the ratio of the concentration of cocaine and its conjugated acid in a solution which has. pH = 7.40 (that of blood) ...

*September 9, 2016*

**chemistry**

To create a 0.1 M carbonate buffer pH = 10.2. You choose to use a combination of HCO3- / CO32-. This buffer system has pKa = 9.9. a) Calculate how much you need to weigh in each of the sodium salts, NaHCO3 and Na2CO3, to create 1.0 L carbonate (with total concentration ...

*September 9, 2016*

**chemistry**

a) Hva er fellesioneffekten? Veronal er et barbiturat (struktur se over). Barbiturater er en stoffklasse som forekommer i en rekke legemiddelgrupper, blant annet i sovemedisiner (hypnotikasedativa), i smertestillende (anestetika) og i antiepileptika. Et barbiturat er en svak ...

*September 9, 2016*

**chemistry**

Calculate the pH reaches 30.0 mL one 0.200 M solution of HCl salt of amitriptyline is added 100.0 mL of a NaOH solution of concentration 80 mM.

*September 9, 2016*

**chemistry**

Calculate the pH at 25 ° C when 120 mL of a HCl solution having a concentration of 50 mM is added 50.0 mL of a 120 mM ephedrine solution. Assume no change in temperature. Amitriptyline is a drug used in treating depression. It is typically formulated as the ...

*September 9, 2016*

**chemistry**

presentation Tasks: Ephedrine (structure see below) is a natural product that is used as a medicine in the treatment of asthma. The corresponding acid to ephedrine have pKa = 9.60 at 25 ° C. Question: Calculate the pH reaches 991 mg ephedrine ...

*September 9, 2016*

**Maths**

Ahmed says that there are 70 sweet in the box to the nearest 10 what is the least number of sweets that could be in the box

*September 6, 2016*

**Maths**

A plane setts off from airport A and flies due east for 100 km, then turns to fly due south for 80 km before landing at an airport b show that the approximate bearing of airport b from airport a is 129

*September 3, 2016*

**History**

Thanks!!

*August 29, 2016*

**History**

Which of these words best describes a merchant? A. Explorer B. Middleman C. Monarch D. Slave I have having trouble between Explorer and middleman... I think it is B.

*August 29, 2016*

**biology**

Color blindness is a defect in vision of colors, this defect is due to a localize-homologous segment of chromosome X. In the document I have a pedigree which the parents and their children are normal; but then most of the children got married to a diseased one which 50% ...

*August 25, 2016*

**Math**

In the cafetería,100 milk cartons were put out for breakfast at the end of breakfast 27 remained. What Is the ratio of the Number of milk cartons taken to the total Number of milk cartons?

*August 23, 2016*