# Posts by Maria

Total # Posts: 2,009

chemistry
A 1.009g mixture of Na2SO4 (molar mass=142.04 g/mol) and Pb(NO3)2 (molar mass= 331.20 g/mol)? A)write th3 molecular form of the equation for the reaction. b)write the net ionic equation for the reaction.

social studies
I guessed all of them... just to get answers..

social studies

social studies
1.c 2.a 3.d 4.b 5.b 6.a 7.c 8.d 9.a 10.d 11.d 12.b 13.a 14.c 15.b 16.a 17.a 18.c 19.b 20.a

math
Sally has 5 hershey bars she has to share the bars with 7 friends how much will each friend get?

Pennfoster
Today, government and corporate security officials are most worried about

AP Chemistry
1.59g

Management
On an organization chart, span of control refers to the

Physics
4. A basketball is thrown from a height of 1.60(m), with an angle of 45o above the horizontal. (a) With what initial speed must the basketball be thrown so that it reaches the basket at the highest point of its trajectory? The basket is at a height of 3.05(m) above the ground...

Social Studies
1.b 2.d 3.a 4.d 5.c

Social Studies
Mrs. Sue are my answers correct 1.b 2.d 3.a 4.b 5.c

math
C(x) = 9x for x <= 150 = 9*150+6(x-150) for 150 < x < 210 = 9*150 + 6*59 + 3(x-209) for x >= 210

math 3
88

physics
thank you so much Damon!

physics
A remote-control vehicle moves forward with constant acceleration. During the ﬁrst two seconds, it travels 55.0(cm), and during the following two seconds, another 77.0(cm) (a) Calculate the vehicle’s initial velocity and its acceleration. (b) What distance will it...

science --- pls check my work!!!
Paige you forgot 3 .-. not very smart

Physics
You're driving down the highway at 20m/s when you see a snowman you don't want to crush 35 m in front of you. Your reaction time before stepping on the brakes is 0.5s, and acceleration created by your brakes is 10 m/s^2 what was the distance travelled before coming to ...

social studies
Who invented the cotton quill

Ms.Sue

Can you search the book

#1-I disagree #2-i don't know that's what's need help with

Well can you please try to search it :-(

The is called Rachel Carson pioneers of ecolegy

I disagree ms.sue And I need help

In the book Rachel Carson I'm suppose to agree or disagree about "a person can be a professional scientist or writer but rarely both".the chapter is 3 it says use details and examples from the chapter to support your decision and it's hard for me and I don&#...

math
I guess it's \$48

Biochemistry
A buffer solution is prepared by mixing 2.50 mL of 2.00M sodium acetate with 3.30mL of 0.500M HCl and diluting the buffer with water to a final volume of 500.0mL. pK acetic acid: 4.76 what is ph of buffer? what is final concentration of buffer?

Math
Xyz rents a car for \$45 and .25 per mile. Cloud rents a car for \$35 and .30 per mile. How many miles would a driver need to drive before the cost of renting a car at xyz and cloud be the same

chemistry
A 0.25 kg length of aluminum wire is warmed 10.0°C by an electric current. How much heat was generated by the current?

spanish
4) ciclismo

spanish
3) equipo

language arts, plays
Thank you, Ms. Sue.

language arts, plays
On October 1, 1956, The Diary of Anne Frank opened simultaneously in seven cities in Germany. At the end of the play, the audience sat silently without applauding. Not long after the play’s opening, Germans began openly expressing remorse for the Holocaust. This was an ...

Science
Which of the following determines the type of biome classification that will be made for a particular reason? a. Climate* b. Size c. Mineral deposits d. Number of human settlements

Physics
A jetliner, traveling northward, is landing with a speed of 60 m/s. Once the jet touches down, it has 795 m of runway in which to reduce its speed to 5.6 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the positive direction to...

Calc
Let f(x)=sqrt(x) and g(x)=sin(x). Find f*g and determine where f*g is continuous on the interval (-4pi, 4pi)

Algebra 2..
Divide -2x^3+21x^2-20x-12 by (x-3) Please explain.

Algebra 2 help!
Divide -2x^3+21x^2-20x-12 by (x-3)

Algebra 2 help...
A half life of a certain radioactive is 36 days. An initial amount of the material has a mass of 487 kg. Write an exponential function that models the decay of this material. Find how much radioactive material remains after 5 days. Round your answer to the nearest thousandth.

Algebra 2 help!!!
Let f(x)=x^2+7 and g(x)= x+3/x. Find (g f)(-5) A.35/12 B.35/32 C.32/35 D.11/25

HEALTH
C. 12

Algebra 2
Find the rational roots of x^4+3x^3+3x^2-3x-4=0. A.0,1 B.1,2 C.1,-1 D.-1,2

Dont get this question..
what are the zeros of the function? y=(x-3)(x+2)(x-2) a.-3,2,-2 b.-3,2,2 c.3,-2,2 d.3,2,2

Use the quadratic formula to solve the equation. -x^2+5x=3 a.5/2 +- sqrt13/2 b.-5/2 +- sqrt13/2 c.2/5 +- sqrt13/2 d.-2/5 +- sqrt13/2

Algebra 2 help!
the equation i posted is the equation i have to use.

Algebra 2 help!
Use the quadratic formula to solve the equation. -x^2+5x=11 a.5/2 +- sqrt13/2 b.-5/2 +- sqrt13/2 c.2/5 +- sqrt13/2 d.-2/5 +- sqrt13/2

Algebra 2
What value completes the square for the expression x^2-16x? a.-64 b.64 c.32 d.-32

Algebra 2
Which matrix represents the system of equations below? -10x-9y+13z=12 8x-7y-5z=15 5x+4y-6z=-12 a. -10,-9,13 8,-7,-5 5,4,-6 b.-10,-9,13 8,7,5 4,4,-6 c.-10,8,5 -9,-7,4 13,5,-6 d. 10,8,5 9,-7,4 13,5,-6

English

English
Identify all the descriptions Whitman uses to compare Lincoln to a ship’s captain. What kind of leader does the speaker consider Lincoln?

Astronomy
On the Autumnal Equinox, you see the Moon in the Waxing Crescent Phase at an angle of 45 degrees above the western horizon. What is the approximate local time? Can someone please explain how to obtain the answer? Thank you!

math

Chemistry
Write a balanced equation for an alpha particle from Gd-148

english
Thank you very much

english
Can someone check my work for me, please. 1.Yesterday he was very busy since he had been fixing the TV from noon. 2. He left for the day before I arrived. He had been waiting for me almost a week. To regret, I couldn't come earlier. 3. When Anna entered the living room, ...

english, grammar
Use Past Simple and Past Perfect Continuous 1. Yesterday he was very busy since he was fixing the TV from noon. 2. He left for the day before I arrived. He waited for me almost a week. To regret, I couldn't come earlier. 3. When Anna entered the living room, everyone was ...

trig.
a person standing 100ft. from the base of the tree looks up to the top of the tree with an angle of elevation of 52. assuming that the persons eyes are 5ft above ground the ground how tall is the tree?

math
Determine the equation of g(x) that results from translating the function f(x) = x2 + 3 upward 14 units. which is the correct answrr: g(x) = (x + 17)2 g(x) = (x + 14)2 + 3 g(x) = x2 - 11 g(x) = x2 + 17

Math
Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -2x2 + 2x + 6 answers available, which one is correct? {–1.30, 2.30} {-2, 2} {–1.00, –3.00} {–0.33, 0.33}

Math
Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -9x2 + 3x + 5. which one is correct: {0.93, –0.60} {-9, 3} {–0.33, –0.56} {–1.80, 0.60}

Math
Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -3x2 + 4x + 3. answers: {–1.00, 1.33} {-3, 4} {–1.33, –1.00} {–0.54, 1.87} Please advise

math
Select the x-coordinate of the vertex of the parabola defined by the function f(x) = -7x2 + 5x + 9. -7/5 9 5/14 -5/7

Math
consider the equations:f(x)=-6x-1 and g(x)=4x^2 Select the solution for (f+g)(x) A) -6x-1+4x^2 B) -24x^3 - 4X^2 C) -24x^2 - 1 D) -6X -1 - 24X^2 I think the answer is A. Please help

English
Jaycee______ himself yesterday when he ran into the goal post. A. Hurt B. Hurted

Math
This is for a second grader. He only works in WHOLE numbers still. I believe this was a mistake on the teachers' part. Should have been "one number is 3 more than the other", I think. Thank you for your help.

Math
My second grader brought home this math problem for which I can find no solution. The sum of two numbers is 21. One number is two more than the other. What are the two numbers?

Algebra
A manufacture sells watches for \$31. The manufacture has a fixed cost of \$6000 per month and variable cost of \$15 per watch. How many watches must be sold to break even? Please show all work!

Statistics
Using a 0.05 level of significance, test the hypothesis that the probability of the NCAA Division I basketball champion being from the Pac 10 is 20%. Repeat the test for the hypothesis that the probability the champion is UCLA is 20%. What do these results say about testing ...

Genetics
Why are we using more dilute cultures for the killing curve while we are using the arg selection culture at full strength? 1. The reason that we are using a more dilute culture for the killing curve is because we want to know how UV light exposure at different time intervals ...

Math
solve: x-squarerootx-2=4 and write 1+4i over 1-i in the form a+bi

marketing
goal help think and analice

Spanish
Raquel y yo queremos alquilar videos. La respuesta seria: Leonardo quiere alguilar videos con nosotros o nosotras? I am confused with nosotros o nosotras. Please help me.

Spanish
Raquel y yo queremos alquilar videos. La respuesta seria: Leonardo quiere alguilar videos con nosotros o nosotras? I am confused with nosotros o nosotras. Please help me.

GCC
PREDICT THE REACTION MG(NO3)2(AQ)+NA(S)

chemistry
A typical bathtub can hold 106 gallons of water. Calculate the mass of natural gas that would need to be burned to heat the water for a tub of this size from 56 ◦F to 87 ◦F. Assume that the natural gas is pure methane (CH4) and that the products of combustion are ...

chemistry
a 100 W electric heater operates for 10 minutes to hear the gas in a cylinder. At the same time, the gas expands from 1 L to 14 L against a constant atmospheric pressure of 4.246 atm. What is the change in internal energy in Joules of the gas?

biology
All of the above

CHEMISTRY
a solution of sodium hydroxide is standardized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the following data, calculate the molarity of the NaOH solution: mass of KHP 1.404 g; buret reading before titration 0.13 mL; buret reading after ...

chemistry 101
We add excess Na2CrO4 solution to 42.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.590 grams. What is the molarity of the AgNO3 solution? Answer in units of M

chem 101
We add excess Na2CrO4 solution to 42.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.590 grams. What is the molarity of the AgNO3 solution? Answer in units of M

math
margaret paid \$87 for a skirt and a blouse. the skirt costs twice as much as the blouse. what was the cost of the skirt?

math
mrs. atkins pays \$1800 for a new refrigerator, washer, and dryer. the refrigerator costs \$250 more than the washer. the dryer costs half as much as the washer. how much does the washer cost?

CHEMISTRY
n unknown amount of water is mixed with 350 mL of a 6 M solution of NaOH solution. A 75 mL sample of the resulting solution is titrated to neutrality with 52 . 5 mL of 6 M HCl. Calculate the concentration of the di- luted NaOH solution. Answer in units of M

MATH
is the answer to this question 13

religion/theology
I was wondering if there was a group or social movement through its work influenced teachings in Catholic Social thought

science
in each duagram a black circle represents a[particle of salt . white circle represents particles of water. which diageram coorecctly showws a solution

Physics
A small airplane has a speech of 200km/h with respect to the air. There is strong wind blowing at 77km/h at 23 north of east with respect to the Earth . A) in which direction should the plane head in order to land at an airport due north of its present location?B) what would ...

Physics ...... Science
A small airplane has a speech of 200km/h with respect to the air. There is strong wind blowing at 77km/h at 23 north of east with respect to the Earth . A) in which direction should the plane head in order to land at an airport due north of its present location?B) what would ...

algebra
An herbalist has 30 oz of herbs costing \$2 per ounce. how many ounces of herbs costing \$1 per ounce should be mixed with these 30 ounces of herbs to produce a mixture costing \$1.60 per ounce?

Early Childhood Literacy
A family-teacher study meeting should NOT include: A. classes on setting up a home library. B. information about the importance of play. C. a “make it/take it” class on homemade reading materials.D. a teacher-parent conference.

Chemistry
Why is it suggested you use weighing paper or a watch glass instead of filter paper on which to allow a sample to dry? Please give two examples.

Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water

math
Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water

physics
A car comes to rest uniform deceleration at the rate of 5.8 m/s2 for 14.3 seconds. What is distance did it travel during this time??

Math
A Classroom bulletin board is 7 feet by 4 feet. If there is a picture of a student every 6 inches along the edge, including one in each corner, how many pictures are on the bulletin board? The teacher gave me the answer 40 but I don't know how.... Can you help me, please

Chapter 8 Vocabulary ,8 th grade
I need help on this I don't know the answer....

Algebra
Please help with this factoring problem: 2x^3/2 − 6x^1/2 + 4x^−1/2 what i did first was make all the exponents whole numbers, so I got: 4x^3-36x+16x^-1 I don't know what to do from there.

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