# Posts by Grace

Total # Posts: 667

**Chemistry**

Suppose a saturated solution of barium fluoride contains 1.5 x 10 ^ -2 M of F-. What is the Ksp of BaF2. I know that the balanced equation of this reaction is: BaF2 (s) --> Ba2+ (aq) + 2F- (aq) There is a 1:1 ratio between BaF2 and Ba2+ and there is a 1:2 ration between ...

**Math**

A recipe requires 3/4 cup of nuts for 1 cake. Enter the maximum number of cakes that can be made using 7 1/2 cups of nuts.

**Math**

A recipe requires 3/4 cup of nuts for 1 cake. Enter the maximum number of cales that can be made using 7 1/2 cups of nuts.

**physics 101**

A truck is moving at the speed of 30 miles per hour, what is it's speed in meter per second.

**math**

If Mr.Chiko earns N$ x in a week and spend N$ y, what part of his weekly salary did he save?

**math**

What is the volume of the cone in the picture if S = 5 and R = 3?

**Operations Management**

Consider the following system: -> 0.73 -> 0.73 -> Determine the probability that the system will operate under each of these conditions: (Round your final answers to 4 decimal places, not your intermediate calculations.) a.) The system as shown b.) Each system ...

**Chem**

Write the formulas of the compounds formed by Pb4+ with the following anions: CN−, ClO3−, SO42−, H2PO4−.

**Science**

What caused the ten years war

**4th grade math**

1/2

**Geography and Society**

Areas near the Equator. because the sun is very strong near the equator which means more evaporation happens. The more evaporation the more condensation. AKA the water cycle.

**Statistics**

In a shipment of 21 parts, four of the parts are defective. If three parts are selected at random without replacement, find the probability that : a.) All three parts selected are defective. 4/21*3/20*2/19=.003 b.) None of the tree parts selected are defective. 3/17*2/16*1/15...

**Life Orientation**

Crime

**social studies**

1. Many agree that Native Americans migrated from Asia as early as _______ years ago. (1 point) 2,000 5,000* 30,000 100,000 2. What country controlled the majority of the Americas in 1783? (1 point) Great Britain* France Spain Native American 3. The Treaty of _______, signed ...

**Math**

There is a bridge that is 1 mile long. You have a piece of steel cable that measures 1 mile and 1 inch. You get 2 very strong people to hold each end of the cable and stand at the ends of the bridge. You, also very strong, stand at the exact middle of the bridge and hold the ...

**English III**

That is correct. (Answer D)

**math**

7893.27

**11Science**

In spermatogenesis four sperm cells are produced from the original spermatocyte, while in oogenesis only one egg cell is produced from the original oocyte. Explain two reasons why this design increases the likelihood of fertilization and pregnancy.

**physical science**

a car accelerates from rest at stop street and covers 10m east in 45.calculate the acceleration of the car(assume uniform acceleration).

**chemistry**

A 7.30-L container holds a mixture of two gases at 45 °C. The partial pressures of gas A and gas B, respectively, are 0.410 atm and 0.620 atm. If 0.150 mol of a third gas is added with no change in volume or temperature, what will the total pressure become?

**Physics**

A man uses a lever jack to lift a 2.00 × 10^3 kg car to change a tire. Each stroke of the jack lifts the car a distance of 5.00 × 10^(-3) m. The vertical displacement of the handle is 0.75 m for each stroke. How much total force does he use with each stroke of the ...

**math**

The population of Town A is 60000 and town B is 70000. Find the percentage of town A as town B

**maths**

The population of town A is 60000 and town B is 70000 find the percentage of town A as town B

**Physics**

An automobile traveling 50km/hr. It decelerates at 5 meter per second square. How long will it take to stop the car? How far will the car travel after a brakes are applied?

**Phiysics**

An automobile traveling 50km/hr. It decelerates at 5 meter per second square. How long will it take to stop the car? How far will the car travel after a brakes applied?

**Math**

Two parallel chords of length 20cm and 11cm lie on opposite sides of a circle. The distance between the two chords is 15cm. Calculate, correct to the nearest whole number the radius of the circle

**math**

Find the radius of the circle if an arc of length 8 ft on the circle subtends a central angle of 225°

**Math**

Ok so really all you have to do is multiply 5 by 2 and add a dollar sign. 2 times 5 is 10 so he spent $10.00

**chemistry**

how many grams of the solid can be formed from 206g of calcium nitrate and 140 g of phosphoric acid? answer in grams. I really need help and fast.

**Pre algebra**

Tropical storm alpha has winds of 50 miles per hour. Write and solve and an inequality to find how much of the winds need to decrease so that the storm is downgraded to 39. Please help, explain steps

**Social Studies**

When the Industrial Revolution started people replaced those who made things by hand with machines therefor the poor lost their jobs. The answer is B.

**HEALTH PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

Answers are B and C, D, A, C, and D. Just took the quiz.

**MATH**

Thank You I Got an 80

**MATH**

Simplify square root of 3 times square root of 21. A.Square root of 24 B.Square root of 63 C.3 Square root of 7 D.None of the above

**math**

Later 7 students joined group 2 (41 students)and one student left to join group 1. (44 students) Now 20 students play trombone and 7 more students play trumpet as play saxophone. How many students play each instrument?

**math**

A garden has a rectangular pool in it with a width that is twice its length. If the land around the pool is 4 meters on all sides and the total area of the land is 136 m^2, what are the dimensions of the pool?

**physics**

4*2=8m/per second

**algebra**

A train leaves Orlando at 3:00 PM. A second train leaves the same city in the same direction at 5:00 PM. The second train travels 20 mph faster than the first. If the second train overtakes the first at 10:00 PM, what is the speed of each of the two trains?

**Math**

I think that the customer gave too little money. That's all I know...

**Math**

If Jack has 2 pencils, and Mr. Youn has 30 times, that would mean you have to do 30 times 2, right? And then, the whole school has 200 times as many as Jack, so in order to find out how much pencils the whole school has, you must do 30 times 200.

**5th grade Math**

Is the Distributive Property of (5*600)+(5*400) (600+400)5? I'm not really sure...please help...

**Math**

What is the distributive property of (5*600)+(5*400)?

**Math**

What is the Distributive Property?

**Math**

Biruk wants to buy a book for $15.25 and a book for $4.85. He wants to pay with one $20.00 bill. Use estimation to decide whether this is reasonable or not. Explain what place value to round for an estimate this is useful in this situation.

**math**

When six standard six-sideddice are rolled,what is the most likely sums of the six number?

**math**

When a six-sided dice numbered1,2,3,4,5and 6 is rolled many times until thesum is greater than12,what is the least likely sum?

**math**

On a standard six-faced die,the numbers of the opposite faces always add to seven,Dena rolls a pair of fair,standard six-faced dice.She then takes the product of four numbers ,the two numbers on the faces that are showing on top of the dice and the two numbers on the faces ...

**math**

If four standard six-sided dice are rolled,what is the probability that the sum of the number on the top faces is 22, or 23,or 24,.express your answer as a common fraction

**Pre-Algebra**

Which exponent makes this statement true? One fifth to the ninth power equals five to what power? A) 9 B)-9 C) 1/9 D)-1/9

**Language Arts**

Thank you!

**Language Arts**

What does the aunt in The Story Teller find improper about the bachelor's story? A. It makes fun of Bertha's goodness B. It has too many fantasy elements C. It unrealistically suggests that virtue is always rewarded D. The bachelor tells it without invitation, ...

**Science please check my answer**

Never mind!

**Science please check my answer**

Which of the following fossil types is best described as forming when minerals replace all or part of an organism's body? A) A mold B) A petrified fossil*** C) A cast D) A trace fossil

**Science**

Thank you!

**Science**

A?

**Science**

What has the study of fossils allowed scientists to do? A) Describe the past environments and the history of life. B) Study present ocean temperatures at different depths C) Analyze the chemical compositions of sedimentary rocks and minerals. *** D) Predict which organisms ...

**Pre-Algebra**

1 1/2?

**Pre-Algebra**

What is the sum of 5/6+2/3? A)1 1/3 B)1 1/2 C)1 2/3 D)1 3/4

**Science PLEASE help!**

THANK YOU!!!

**Science PLEASE help!**

What is the difference between a scientific theory and a scientific law?

**Science**

A student measures a room to be 20.0m*17.16m. Which of the numbers below represents the room's area with the correct number of significant figures? A) 340 meters squared B) 343 meters squared C) 343.2 meters squared D)343.20 meters squared

**Science**

A?

**Science**

Why do scientists use models of natural science? A) Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly B) Scientists use models of natural systems because they like to use art in science. C) ...

**Language Arts**

Thank you!

**Language Arts**

What does the word conviction mean in this sentence? His voice rang with great conviction as he told us his ideas. A)Anger B)Certainty C)Confusion D)Sorrow

**Physics**

An 8 kg mass is supported by an aluminum wire of length 80 cm abd diameter 2.0mm. How much will the wire stretch?

**Physics**

An 8 kg mass is supported by an aluminum wire of length 80 cm abd diameter 2.0mm. How much will the wire stretch?

**Physics**

What are three different kinds of automatic switching devices? What are the conditions that cause the on/off action of the switch?

**physics**

A 15-V battery is hooked up to three resistors in series. The voltage drop across the first resistor is 3V and the voltage drop across the sencond resistor is 10V. What is the voltage drop across the last resistor? I don't understand what equation to do for this problem. ...

**Life Orientation**

the link between itrapersonal conflict and an initiating romantic relationship

**Quick English check**

Can someone check that I put these words in the right spot of where they need to go? Please correct me if I'm wrong! :) In the 1950s in Europe, to BROACH such a controversial subject as the Algerian separatist movement in a public forum was assured to immediately EVOKE ...

**Quick English check**

Please check to see if I have these words in the correct sentences. Correct me if I'm wrong! :) 1. The defendants attorney objected to the plaintiff's ASSERTION, claiming it was hearsay. 2. The news media PROMULGATED the results of the election. 3. I tried to ...

**Quick English check**

Can someone check that I put these words in the right spot of where they need to go? Please correct me if I'm wrong! :) In the 1950s in Europe, to BROACH such a controversial subject as the Algerian separatist movement in a public forum was assured to immediately EVOKE ...

**international school of south Africa**

mathematics, geography, economics and English literature what career options are there following those subject choices

**Differential calculus**

A gutter with trapezoidal cross section is to be made from a long sheet of tin 8 in wide by turning up one third of its width on each side , what width a cross the top that will give a maximum capacity

**Geometry**

If a ray divides an angle into two supplementary angles, then the original angle is a straight angle.

**Probability**

1/2

**English**

So the main points of the argument in this case would be again to unify the country, as well as instil patriotism into he citizens?

**English**

We had to read Kennedy's Inaugural Speech: Vice President Johnson, Mr. Speaker, Mr. Chief Justice, President Eisenhower, Vice president Nixon, President Truman, Reverend Clergy, fellow citizens: We observe today not a victory of party but a celebration of freedom--...

**St paul's university**

A sample of 200 voters revealed the following about the three candidates A,B and C.28 were in favour of both A and B.98 in favour of A or B but not C.42 in favour of B but not C or A.122 in favour of B or C but not A.64 in favour of C but not A or B.14 in favour of A and C but...

**english**

thank you :)

**english**

hello admin,i have an english homework and i confuse with this question 1 robin still felt --------- of the accident several months later. a reaction b effects c affects d contraction and i answer a,is it wrong? 2 despite the peer pressure, jessica held fast to her _________ a...

**math**

A first-class letter can weigh up to 13 ounces before additional charges must be added. Estimate how much more weight can be added to a letter that weighs 10 1/3 ounces.

**english**

I thought it was c

**math**

i started with the first charges: sqrt[2(20)(100))/0.05]. I don't know I'm doing right. Here the problem: Suppose you have a choice of three suppliers for footballs. the first charges $100 per delivery but won't deliver more than 200 at a time; the second charges $...

**Math**

John and Jack to help their mothers make fudge for their classroom parties in different classes John's class received 2 1/2 pounds for 25 children Jack's class received 3 1/2 pounds for 35 children which class was able to each more fudge per student?

**MATH**

A food snack manufacturer samples 15 bags of pretzels off the assembly line and weighed their contents.If the sample mean is 10.0 and the sample standard deviation is 0.15, find the 95% confidence interval of the true mean.

**Language Arts**

What is the most important reason for using multiple sources in a research presentation? A. So you include primary and secondary sources. B. So you have experience conducting original research. C. So you know that the information is accurate. D. So you use the best online ...

**langauge arts**

What is the best way to rewrite the following topic to form a focused thesis statement? Electric cars vs. Cars fueled with gasoline A. Cars fueled with gasoline shouldn't be allowed on the road, especially when electric cars are so readily available. B. Electric cars and ...

**Languagd Arts**

Which of the following is the best reason to use visuals in a research presentation? A. To illustrate your main point in an engaging manner. B. To illustrate any topic with data in percentages. C. To show different ways of looking at the same information. D. To show the ...

**Math**

You roll a pair of number cubes and then flip a coin. Is this an example of independent or dependent events? A. Independent B. Dependent Is the answer A? Thank you

**Math**

My Sister told me to.

**Math**

Suppose you write the letters M-I-S-S-I-S-S-I-P-P-I on cards and mix them in a hat. You choose one card from the hat without looking. What is the probability of picking an S? A.4\11 B.2\11 C.4\7 D.7\4 Is the answer A? Thank you

**Math**

Suppose you write the letters M-I-S-S-I-S-S-I-P-P-I on cards and mix them in a hat. You choose one card from the hat without looking. What is the probability of picking a P? A.4\11 B.2\11 C.4\7 D.7\4 Is the answer B? Thank you

**Math**

Thank you Ms. Sue😃

**Math**

You have made 3 out of 10 of your last free throws. How many free throws can you expect to make if you shoot 100 free throws? A.30 B.50 C.60 D.75 Is the answer A? Thank you

**Math**

Thank you.

**Math**

You flip a coin 30 times and get heads 11 times, so the chance of getting heads is 11\30. Is this an example of theoretical or experimental probability? A. Theoretical B. Experimental Is the answer B? Thank you

**7th grade math**

Quadrilateral WXYZ os describes below. Line segment WX is parallel to line segment YZ. Line segment XY is the same length as line segment ZW. Line segment Xy is not parallel to line segment ZW. Which of the following describes quadrilateral WXYZ? A. parallelogram B. rectangle ...