# Posts by D

Total # Posts: 400

**chemistry**

Given a 1.00 L solution that is 0.60 M HF and 1.00 M KF, calculate the pH after 0.080 mol NaOH is added, and calculate the pH after 0.24 mol HCl is added to the original solution.

**algebra**

eee

**ELA plez help**

what statement is true about dialogue? 1.The words each character says are enclosed by quotation marks 2. the words each character says appear next to the characters name. 3. The words that the main character says appear in italics or brackets 4. the words that address the ...

**Hot math questions**

no, 2 s - 1

**Math**

draw a line perpendicular to the first one what is its slope? original line: y = -7 x + 2 so the original slope is -7 slope of perpendicular = -1/-7 = 1/7 now make that perpendicular go through (-1,-3) -3 = (1/7)(-1) + b -3 +1/7 = b b = -20/7 so our line is y = (1/7)x -20/7 ...

**math**

You flip a fair coin 10,000 times. Approximate the probability that the difference between the number of heads and number of tails is at most 100.

**physics**

A crate with a mass of (111.5) kg is lifted by a crane. If the crate is accelerating upward at (2.7) m/s2, what is the tension in the cable? Give your answer in newtons (N) and with 3 significant figures.

**Math**

If a water bottle holds 1.5 litters of water if I open a new bottle an drink half how much water is left

**Chemistry**

22

**math**

Which sentence correctly describes a data set that follows a normal distribution with a standard deviation of 4 and a mean of 14? 68% of the data points lie between 10 and 14. 68% of the data points lie between 8 and 12. 68% of the data points lie between 10 and 18. 68% of the...

**finance**

the school you would like to attend costs 100,000, to help finance your education you need to choose whether or not to sell your 1000 shares of Apple stock , 1000EE Savings Bonds (with denominations and 4.25% coupon rate) that are five years from their 30-year maturity date of...

**finance**

I believe the best response would be to go with the 100 shares of the company stock in which may provide a higher percentage of revenue within the next few years. Although the 5000 bonus can be in your checking account today, you are able to receive more income with the ...

**Algebra 1- Urgent**

Part A: Sam rented a boat at $225 for 2 days. If he rents the same boat for 5 days, he has to pay a total rent of $480. Write an equation in the standard form to represent the total rent (y) that Sam has to pay for renting the boat for x days. (4 points) Part B: Write the ...

**english 3**

What specifically was Dr. Martin Luther King Jr. speaking out against when he made this statement in 1958? “I could never adjust to the separate waiting rooms, separate eating places, separate rest rooms, partly because the separate was always unequal, and partly because ...

**Math**

Jeremy loves right triangles that have side length 1. In fact, he loves to combine them so that the hypotenuse of one becomes the leg of the next. If the longer leg of the first triangle is sqrt 11, what will be the hypotenuse of the 2014th triangle? I don't understand ...

**MATH**

D

**U.S. History**

thank you all!

**U.S. History**

1. What would this image convey to someone from the early-1900s about about the suffrage movement? (image: "early-1900s women's suffrage painting"-- this has a sign on it that says "official program women's suffrage procession" a person riding a ...

**Math2(Reiny Please Help)**

0.02(3s^2+20s)=50 3s^2+20s=2500 3s^2+20s-2500=0 x=25.725992956937827 =25

**Geometry**

wtf?

**Trigonometry**

a line which passes through the origin contains point A (-0.714, 0.700) . find the gradient of the line and the angle formed with respect to the positive x-axis in Degrees

**physics**

Find the time constant (T) for the RC circuit with an open switch given t = 10 ms 50% of Qmax charge T = ? Q = CV (1-e -t/T)

**math**

dw

**english**

bad impact on their lifestyle give me a better word then bad please

**Chemistry**

Pb + S yield FeS

**English**

What where the answers

**chemistry**

bofa

**ai**

Ellen drove 240 miles in 3.5hours. To the nearest tenth, find Ellen's average speed in miles per hours

**Math**

1/12

**Math**

What is the missing number from this number sentence? 7 ? 16 31 I'm always confused with this.

**Math**

What is the missing number from this number sentence? 7 ? 14 31 I'm always confused with this.

**reading**

nto the solemn church, and scatter the congregation, Into the school where the scholar is studying, Leave not the bridegroom quiet—no happiness must he have now with his bride, Nor the peaceful farmer any peace, ploughing his field or gathering his grain, So fierce you ...

**chemistry**

44573.68

**precalc**

D(x) = x^2+2x E(x) = -2/(5x-1) D/E=

**precalc**

are these correct? 1) y=4 2) x=2 4) y=-3x-1 5) y+4=2/3x+1 6) y=4x+5

**precalc**

write a linear equation to fit each situation or description. 1) the line through (2,4) parallel to the x axis. 2) the line through (2,4) perpendicular to the x axis. 3) the line through (3,1) perpendicular to y=4x-3. 4) the line through (-2,5) parallel to y=-3x. 5) the line ...

**pre-calculus**

Rewrite each equation into slope intercept or special case form. 1) 4x+3=8x 2) 9y-(7+3y)=0 I have no idea how to do these two. Can someone please help me? 3)x/2+y/7=1 My answer is y=-7x+14. Is this correct?

**pre-calculus**

h(t)=15t + 1200 is a function that models the motion of a mountain climber. h(t) is his height above sea level at time t in minutes. 1a) the coefficient on t is 15. what does it tell you about the motion of the mountain climber? 1b) what does it tell you about the graph of h(t...

**Chemistry**

What is the sign of the entropy change for the following reaction, which is the principal process taking place when mortar hardens? Ca(OH)2(s) + CO2(g) ---> CaCO3(s) + H2O(l) Would the sign of entropy be negative since a solid and gas yields a solid and what does it mean by...

**HELP PLEASE NOW**

@Stephen she can see your IP address on this site.

**english**

nmk,

**Chemistry**

A 360-mL sample of hydrogen is collected when the pressure is 800 mm Hg. What is the volume that the gas will occupy when the pressure is 720 mm Hg? 360/x=720/800 28800/720=720x/720 400-mL=x Am I correct?

**Math**

Hint: 6% x $1,000,000 / $1,000,000 – {20% x ($1,000,000 – (6% x $1,000,000))] = ?

**chemistry**

Aqueous ammonia is commercially available at a concentration of 16.0 M. Part A How much of the concentrated solution would you use to prepare 500.0mL of a 1.30M solution?

**english**

1, 2, and 5 should be A. Am I correct?

**english**

can you please tell me if i'm correct or not? write A if the sentence is active or P if it is passive. 1. max and his uncle towed the car to a downtown garage. P 2. lightning hit our house during last night's storm. P 3. the opening remarks were made by the president ...

**physics**

If the speed of sound in air is 340 m/s, what is. approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 134 Hz? Answer in units of cm.

**physics**

The distance between two consecutive nodes of a standing wave is 22 cm. The hand generating the pulses moves up and down through a complete cycle 3.89 times every 4.68 s. Find the velocity of the wave. Answer in units of m/s

**physics**

An automobile having a mass of 1330 kg is driven into a brick wall in a safety test. The bumper behaves like a spring of constant 4.12 × 106 N/m and compresses 4.99 cm as the car is brought to rest. What was the speed of the car before impact, assuming no energy was lost...

**physics**

The body of a 1285 kg car is supported on a frame by four springs. The spring constant of a single spring is 2.80 × 104 N/m. Four people riding in the car have a combined mass of 275 kg. When driven over a pothole in the road, the frame vibrates and for the first few ...

**math**

how do you create of six values that does not represent a linear relation. All the y-values must increase in value as x increase in value?

**math**

Please help me on linear relation. I have tries but I am really stuck on the creating table and graphing. 1. provide a table of six values that represent a linear relation. All the y-values must be less then zero. 2. provide a table of six values that does not represent a ...

**vocab**

loquaciuos

**physics**

A light, rigid rod l = 5.55 m in length rotates in the xy plane about a pivot through the rod’s center. Two particles of masses m1 = 9.8 kg and m2 = 2.4 kg are connected to its ends find the moment of inertia

**physics**

A student holds two lead weights, each of mass 12 kg. When the students’ arms are extended horizontally, the lead weights are 0.82 m from the axis of rotation and the student rotates with an angular speed of 1.5 rad/sec. The moment of inertia of student plus stool is 5.5 ...

**physics**

A light, rigid rod l = 5.55 m in length rotates in the xy plane about a pivot through the rod’s center. Two particles of masses m1 = 9.8 kg and m2 = 2.4 kg are connected to its ends. Determine the angular momentum of the system about the origin at the instant the speed of...

**physics**

A cylindrical 9.16 kg pulley with a radius of 0.373 m is used to lower a 2.64 kg bucket into a well. The bucket starts from rest and falls for 3.94 s. What is the linear acceleration of the falling bucket? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s 2

**physics**

After coming down a steep hill at a constant speed of 49 m/s, a car travels along the circumference of a vertical circle of radius 329 m until it begins to climb another hill. What is the magnitude of the resultant force on the 170 kg driver of the car at the lowest point on ...

**physics**

A ball of mass 21.7 g is attached to a cord of length 0.61 m and rotates in a vertical circle. What is the minimum speed the ball must have at the top of the circle so the cord does not become slack? The acceleration of gravity is 9.8 m/s . Answer in units of m/s

**math**

I need help on this question. Can someone help me get through with these question The area of canada is approximately 1x10(Exponent)7, and the area of Mexico is approximately 2x10 (exponent)6 square kilometers. The area of Canada is approximately how many times the area of ...

**math**

48

**math**

Denise calculated the missing side length of one of these triangles using the Pythagorean Theorem. Which triangle is it

**English**

CHECK PLEASE? Is this a good analytical paragraph? Edgar Allen Poe’s poem, “The Bells”, uses personification and alliteration in order to establish a new tone for each stanza. Personification is used to create a transition in the stanzas, to differentiate the ...

**Language Arts**

Is this a good analytical paragraph? Edgar Allen Poe’s poem, “The Bells”, uses personification and alliteration in order to establish a new tone for each stanza. Personification is used to create a transition in the stanzas, to differentiate the tone change ...

**english**

wat the answr

**Geometry/Algebra**

sure whatever

**Geometry**

1.1.Determine whether the regular pentagon has reflection symmetry, rotation symmetry, both, or neither. If it has reflection symmetry, state the number of axes of symmetry. If it has rotation symmetry, state the angle of rotation. For each type of symmetry, explain how you ...

**Physics/science**

2. An astronaut in orbit outside an orbiting space station throw her 800.0-g camera away in disgust when it jams. If she and her space suit together have a mass of 100.0 kg and the speed of the camera is 12.0 m/s.

**Finance kennedy king**

4. A firm's net income last year was $1.5 million. Its net income grew 5 percent during the last 5 years. If that growth rate continues, how long will it take for the firm's net income to double?

**Finance math**

9. Compute the present value of $4,000 paid in five years using the following discount rates: 10 percent in year 1, 2 percent in year 2, 12 percent in year 3, and 9 percent in years 4 and 5.

**8**

8. You invested $2,000 in the stock market one year ago. Today, the investment is valued at $9,500. What return did you earn? What return would you need to suffer next year for your investment to be valued at the original $2,000?

**7**

6. You are scheduled to pay a $350 cash flow in one year, and receive a $1,000 cash flow in years 3 and 4. If interest rates are 10 percent per year, what is the combined present value of these cash flows?

**6**

6. You are scheduled to pay a $350 cash flow in one year, and receive a $1,000 cash flow in years 3 and 4. If interest rates are 10 percent per year, what is the combined present value of these cash flows?

**5**

5. Assume you borrow $5,000 today and pay back the loan in one lump sum four years from today. You are charged 8 percent interest per year. What amount will you pay back and how much interest will you pay?

**F**

4. A firm's net income last year was $1.5 million. Its net income grew 5 percent during the last 5 years. If that growth rate continues, how long will it take for the firm's net income to double?

**Csu**

3. What is the value in year 20 of a $1,000 cash flow made in year 8 if interest rates are 15 percent in years 6 through 13 and increase to 18 percent in the remaining years?

**Kennedy king**

2. A $5,000 investment has doubled to $10,000 in ten years. How much longer will it take for the investment to reach $15,000 if it continues to earn the same rate?

**physics**

ddd

**science**

True

**physics**

41.55

**science/math**

sd

**engineering mechanics**

the greatest and least resultant of two forces are respectively 17 KN and 5 KN. determine the angle between two force when their resultant is root 144 KN.

**economics 6**

fffg

**Math**

Choose the best description for the real number 34/5 Irrational, because it is a fraction Irrational, because it is a repeating decimal Rational, because it is a fraction Rational, because it is a terminating decimal

**Statistics**

435

**Stats**

the average placement test score of a sample of 64 students out of 1000 registered at a community college is 70 with a standard deviation of 15. Construct a confidence interval with a 5% chance of error.

**chemistry**

Question Part Points Submissions Used A swimming pool, 20.0 m ✕ 12.5 m, is filled with water to a depth of 3.85 m. If the initial temperature of the water is 18.9°C, how much heat must be added to the water to raise its temperature to 28.7°C? Assume that the ...

**math**

3.8

**Geometry**

Can you please explain this to me?

**Geometry**

Find the area of the composite figure(right triangle), where the hypotenuse is 13m, base is 12m and the height is not given?

**Math**

i do not know can you help me please who are you

**Physics**

A rifle shoots a 4.1g bullet out of it's barrel. The bullet has a muzzle velocity of 975 m/s just as it leaves the barrel. Assuming a constant horizontal acceleration over a distance of 43.0 cm starting from rest, with no friction between the bullet and the barrel, what ...

**math**

do it yourself

**physics**

How do I calculate the radial acceleration in g's? For example: Calculate the radial acceleration (in g’s) of an object on the ground at the earth's equator, turning with the planet. Earth's radius is 6380 km.

**Physics**

A 26.2 g marble sliding to the right at 62.0 cm/s overtakes and collides elastically with a 13.1 g marble moving in the same direction at 15.5 cm/s. After the collision, the 13.1 g marble moves to the right at 77.5 cm/s. Find the velocity of the 26.2 g marble after the ...

**Math**

12cmweight lengt=20cm

**Math**

furry sack of balls

**Math**

30

**Chemistry**

Describe the creation of 234 mL of a 3.2 M sodium chloride solution