# Posts by claire

Total # Posts: 689

**atlantic**

A car is designed to last an average of 12 years with a standard deviation of 0.8 years. What is the probability that a car will last less than 10 years?

**Math 120**

There are four aces in a pack of 52 cards so 48/85 = 0.923 or 12/13 or 0.923 chance of not getting an ace

**Math Statistics**

They used an exponential regression model where the predictor is time in months and the response var is money measure in thousands of dollars. Alpha 4.2 and Beta is 1.03 Based on this model, how much money (in thousands) will he have after six months? I am confused by this and...

**Math Statistics**

I am confused I want to find the values of the equation of Yi=a + bxi. Time spent on twitter is the predictor variable and time spent working on twitter is the response The correlation between minutes spent on twitter and minutes spent working is -0.5 The standard deviation in...

**Statistics**

I am confused I want to find the values of the equation of Yi=a + bxi. Time spent on twitter is the predictor variable and time spent working on twitter is the response The correlation between minutes spent on twitter and minutes spent working is -0.5 The standard deviation in...

**Statistics**

You look at the relationship between how much time people spend on the website ‘Bookface’ and how productive they are at work. time spent on Bookface is the predictor variable, and time spent working is the response variable. correlation between minutes spent on ...

**Statistics**

I am confused by the following and need some help You want to find the values for the equation ?i=a+bxi. What is the value of the slope? time spent on Bookface predictor variable, time spent working is the response variable. correlation between minutes spent on Bookface and ...

**Calculus**

Find the volume of the solid obtained by rotating the region enclosed by the graphs x=y^{5} and x=5sqrty about the y-axis over the interval [0,1].

**Statistics Maths**

Iam confused by this and need some help not sure if I am right about this = 3000-7.3x x 50 = 2635 regression equation: number of tickets = 3000 - 7.3x, where x = ticket price. If Yoncebé prices the tickets at $50, how many tickets is she predicted to sell?

**French**

I am a little confused as to how a sentence can have a what looks like a "complement de phrase" but is actually part of the subject. I am supposed to formulate a sentence that is like this. Thanks for any assistance.

**Physics**

A 15.0 gram bullet with a speed of v is fired into a 400 gram block of wood that is initially at rest on a surface. The coefficient of kinetic friction between the block and the surface is 0.250. The block of wood is attached to a horizontal massless spring with a spring ...

**Social Studies**

But you aren't my teacher

**physics**

A car brakes at constant acceleration from a velocity 226m/s to 12.5m/s over a distance of 105m.find; a)How much time elapses during this time interval. b)what is the acceleration. c)if the car continued to be braked at same constant acceleration how much longer would it take ...

**Physics**

A car starting from rest is uniformly accelerated so that it's velocity in 5 seconds is 36 km/h . It travels at this velocity for 5 seconds, and then a brake is applied to bring it to rest in the next 5 seconds. Find the total distance travelled

**Measurement - Distance**

A and B are 525 km apart. Michael left A at 8am and travelled to B at a constant speed of 75 km/h. Chad left A some time later on his way to B. Chad passed Michael at 10:30 am and then travelled at an average speed of 90 km/h for the rest of his journey. How far would Michael ...

**Math**

Steve, what was that formula?

**algebra**

I will check back later today. Try to check my answers for me...and make corrections to make sure we have it right for the next person that needs the answers. Thanks

**algebra**

I think this is the answer you are looking for: (it is late here and I'm late to bed...lol) If y varies directly with x, find the constant of variation with x = 24 and y = 8 k = y/x = 8/24 = .333... If y varies inversely with x, find the constant of variation with x=4 and ...

**Maths**

Macdavie Maseko, If you are there...this is a link that leads you to a site on the computer and it will allow you to see it work in action. It is very cool. Go to the page below these answers here, where it says "RELATED QUESTIONS". Click on the first question, of ...

**Maths**

If you look up an answer from below and follow this it might help you. I am trying to figure out an answer. I'm up late trying to help the math and science students!! SEE BELOW: Please help with Calculus?? - Steve, Friday, November 8, 2013 at 6:46pm I think you will be ...

**Monster college**

Go to the page below these answers here, where it says "RELATED QUESTIONS". Click on the first question, of Please help with Calculus?? Then go to Steve, Friday Nov 8, 2013 and click on his link. You can see the table working for you!!!

**Math**

Sorry, I drew the picture and it didn't show it. So, it is 2 meters converted to 200 cm times 12 cm times 12 cm to figure the volume.

**Math**

/ / 2m / / / / 2m x12cm x 12cm = volume / / =>200cm x12cm x 12cm= volume 12cm[___} =>200cmx12cm x 12cm= __cm3 12cm =>(200x12x12)cm3 => 28,800 cm3

**Math**

Lillie, is your question written correctly?

**Phyisics**

Riya, don't you have a formula to use something like this? It's been a while here. I'm looking to help. The clue is that the shelf is at rest, so something is at one or zero in one of the formulas...right? Displacement = Amplitude x sin (angular frequency x time) y...

**math**

Now that we have solved for the 'S' variable, you can plug the value into the other formulas to figure out the number of 'bugs' that were present. Here goes: Spiders is 8, Beetles is 5x8 or 40; Caterpillars are 8-6 or 2. Now, double check the answer by making ...

**math**

I guess that was a "no" answer??? OK... let me help a little more. If you'd still like my help. Lets look at setting a variable us for the spiders first. Ok? We will use a letter "S" for the number of Spiders. Lets make a sentence now. She saw: S=...

**math**

Start with one variable and then use it to set up your next unknown...and so on. Do you understand?

**Math**

Apples weigh....16 oz per pound, so convert 5 oz of apple into lbs Apple weight: 1 apple/5oz x 16 oz / 1-lb = =16/5 apples/lb =3.2 apples/lb Apples $3 for 2 lbs, spending $9. $9/$3= 3. 3 sets of 2 pounds of apples can be bought. There are 3.2 apples in each lb of apples, so 3....

**Math**

First you need to figure out how much an apple weighs in pounds.

**physics**

Kim, did you find the answers?

**Math for Ms. Sue**

I'm Claire's grandma; a retired teacher of science and supplemental in math. I am stumped on her question about pizza tonight. I'm working via phone with her. Would you mind taking a look at it. I know the answer, but not sure how to explain the results. Please and...

**Math**

:-) Very Good

**Math**

Matt, I wanted you to see the rates of the championships per year. I hope you understand that you need to have the units with the numbers when you turn in your answers.

**Math**

Matt, check the rate of the other question for me.

**Math**

The math is correct!

**Algebra 1**

TJ, I have been out of school for quite a while...please let me know what this symbol is used to represent: ^

**Math HELP HELP**

I am working on this...are you still up?

**Math**

A geometry class has a pizza party. there are 14 students that have a pizza. Each pizza has 8 slices. The teacher wants to buy the least number of pizzas so that they are the same number of slices for each student. (I know the answers, but I don't know how to show the work...

**Math**

Yuppers!

**Math**

For a rate, you need to let the people know what you are talking about...such as when you are talking about speed in your car, (example): Traveling at a rate of 30 miles in 2 hours or, 30 miles / 2 hours

**Math**

What I see Matt, is a rate of 4 championships per 16 years or simplified...into: 4 champ ---------- = 1 championships / 4 years 16 years ----OR----- 16 years ---------- = 4 years / championship 4 champ

**Math**

Matt, it doesn't have a definition for 'rates' in your book at all?

**Math**

Set up this in championships per year

**Math**

In your math book, do they take about rates?

**Science**

'The Recipe' for filling a raised bed these proportions are recommended: 60% topsoil, 30% compost and 10% soilless growing mix or potting soil. If you do not have access to quality topsoil, an acceptable substitute would be a 50-50 blend of soilless growing medium and...

**PreCalculus**

Math - Reiny, Tuesday, September 20, 2016 at 11:16pm

**PreCalculus**

Susan, check out the answer from the related question below this one.

**Algebra**

32z= 216 I don't know how to do this algebraically.

**Chemistry**

After you preform your experiment, you determine that the Kf value for naphthalene is 6.89 °C/m . You are using 10g of naphthalene and added 1.0 g of your unknown. The the freezing point of the solvent decreased by 4.42 °C when the unknown was added. Knowing this ...

**Chemistry**

How much ethylene glycol (C2H6O2, the major component of antifreeze) must be added to 1 L of water to keep it from freezing at -17 oC? Kf = 1.86 oC/m. I got 163.96 or 164 for my answer but that isn't correct and I don't know what I'm doing wrong.

**Precalculus**

You are given the dollar value of a product in 2013 and the rate at which the value of the product is expected to change during the next 5 years. Use this information to write a linear equation that gives the dollar value V of the product in terms of the year t. (Let t = 13 ...

**English**

The poem small passing by I grid de kok is free verse so has no structure, but I am not sure what sound device is used to creat rhythm and form? Please help

**English**

How does the poet creat contrast in the poem 'small passing' referring to the first section? Lines 1-35 I know what the contrast is. But not sure how to explain how it is created. So the contrast would be how a mother of a white child has. Lost her baby and should not ...

**science**

Ryan wants to identify an element. Which piece of information would best help Ryan identify the element?

**ENGLISH**

Their skins like litmus

**Math**

4x8x4x8,base 4

**math**

The value of y is inversely proportional to the value of x. When y=42 x=6. What is the value of y when x=9

**plz help math**

The formula for the force between two objects is F=GMm/r^2 where M and m are the masses of the two objects, G is a constant, and r is the distance between them. Solve the formula for m .m=Fr^2/GM m=r^2/FGM m=GM/Fr^2 m=FGM/r^2

**math**

Elimination was used to solve a system of equations. One of the intermediate steps led to the equation 9x=27 . Which of the following systems could have led to this equation? 4x+3y=24 −5x−3y=3 7x−2y=15 x+y=6 9x+2y=21 −9x−2y=21 10x−y=15 x+y...

**math**

The diameter of a hydrogen atom is about 5×10^-11 meter. Suppose 8.4×10^8 hydrogen atoms were arranged side by side in a straight line. Multiply these numbers to find the length of this line of atoms. What is the length in scientific notation? 42×10^−3 ...

**math**

The volume of Jupiter is about 1.43*10^15 cubic kilometers. The volume of Earth is about 1.09*10^12 cubic kilometers. The number of Earths that can fit inside Jupiter can be found by dividing Jupiter's volume by Earth's volume. Find this quotient and express the answer...

**math**

Lisa and Katie are playing a card game, and a total of 900 points has been scored. Lisa scored 150 more points than Katie. If you let l= the number of points that Lisa scored, and k= the number of points that Katie scored, then the problem can be represented by the system: l+k...

**History**

Thank you so much!

**History**

1. What paints did the Mughals use to create their paintings? What pigments were used to create these paints? 2. How expensive were these pigments? I haven't been able to find much information regarding the paints or pigments used online, but I would be able to determine ...

**word problem math**

Keith has p pennies, n nickels, and d dimes in his pocket. The total number of coins is 9. The expression 0.01p+0.05n+0.10d0.01p+0.05n+0.10d represents the value of the coins, which is equal to $0.53. He has two fewer nickels than dimes. How many pennies does Keith have? Keith...

**math**

The area of a triangle varies jointly with the height of the triangle and the length of its base. The area of one triangle is 200 square centimeters when its height is 25 centimeters and its base length is 16 centimeters. What is the area of a triangle having a height of 20 ...

**math**

The volume of a pyramid varies jointly with the base area of the pyramid and its height. The volume of one pyramid is 24 cubic inches when its base area is 24 square inches and its height is 3 inches. What is the volume of a pyramid with a base area of 15 square inches and a ...

**math**

Video Villa rents classic video games for $2.50 for 5 days. New games rent for $3.50 for 5 days. If Rob rents c classic games and n new games, what is his cost per day, in dollars, for renting the games for 5 days? Select one: a. 0.50c+0.70n b. 0.50c+0.75n c. 0.25c+0.35n d. 0....

**math**

Arianna has a large piece of fabric that she wants to use to make some scarves. The number N of scarves she can make is inversely proportional to the area A of each scarf. If the area of each scarf is 3 square feet, then she can make 15 scarves. If the area of each scarf is 5 ...

**math**

Arianna has a large piece of fabric that she wants to use to make some scarves. The number N of scarves she can make is inversely proportional to the area A of each scarf. If the area of each scarf is 3 square feet, then she can make 15 scarves. If the area of each scarf is 5 ...

**Calculus**

Thank you

**Calculus**

The base of an isosceles triangle is 8 feet long. If the altitude is 6 feet long and is increasing 3 inches per minute, are what rate are the base angles changing?

**math**

The clock face in a famous clock tower has a radius of about 5 meters. What is the area of the clock face to the nearest square meter? Use 3.14 as an approximation for pi.

**math**

Which statement concerning the equation x^2+2=x is true? Its discriminant is 0 , so it has no solution. Its discriminant is 0 , so it has one real solution. Its discriminant is -7, so it has two complex solutions. Its discriminant is -7, so its solutions are negative.

**math**

A flying disc has a radius of 6 inches. What is the area of one side of the flying disc to the nearest square inch? Use 3.14 as an approximation for pi. A) 113 square inches B)452 square inches C)38 square inches D) 28 square inches

**Calculus**

A conical cistern is 10 ft. across the top and 12 ft. deep. If water is poured into the cistern at the rate of 1 cubic foot per second, how fast is the surface rising when the water is 8 ft. deep?

**Trigonometry**

At a point on the ground 125 ft from the base of a tower, the angle of elevation to the top of the tower has a degree measure of 38 degrees. How high is the tower

**Chemistry**

For the reaction H2(g) + I2(g) ⇀↽ 2 HI(g) at 425◦C, calculate [HI], given [H2] = [I2] = 0.000617 mol/L and K = 54.3.

**math**

Anthony has 7 bills. All the bills are tens or twenties. The bills Anthony has total $100 in value. How many of each hill does Anthony have? Pretty sure the solving method is solving systems of equations but you have to isolate the variables and stuff.. please help!!

**math**

Which statements are true for irrational numbers written in decimal form? A. Irrational numbers are nonterminating. B. Irrational numbers are repeating. C. Irrational numbers are nonrepeating. D. Irrational numbers are terminating.

**adding integers**

A stock lost 7 1/8 points on Monday and then another 1 7/8 points on Tuesday. On Wednesday, it gained 13 points. What was the net gain or loss of the stock for these three days? A) a loss of 22 points B) a gain of 4 points C) a gain of 18 1/4 points D) a gain of 7 3/4 points

**Chemistry**

Consider the following acid/base reaction CO3^2− + 2H^+ → H2O + CO2 that produces CO2 gas. 6 L of CO2 is collected at STP. What is the molarity of the HCl solution used in the reaction if 81 mL of HCl was needed?

**Chemistry**

You have a vinegar solution you believe to be 0.53 M. You are going to titrate 20.72 mL of it with a NaOH solution that you know to be 0.974 M. At what volume of added NaOH solution would you expect to see an end point?

**Factor out the Greatest Common Factor (GCF)**

Factor out the Greatest Common Factor (GCF): 45d^3-18d^2

**Algebra 2**

Carla’s kitchen floor is in the shape of a perfect square. Her copycat brother, Carl, wants to re-model his kitchen so that it will have the same surface area as his sister, but his kitchen will be rectangular. The length of his floor is half the length of his sister’...

**Math**

How are hexagons a subcategory of polygons

**Science!**

Guys it's just a practice test

**Math**

A flying disc has a radius of 7 inches. What is the area of one side of the flying disc to the nearest square inch? Use 3.14 as an approximation for pi.

**Social studies**

Im very confuzzled.....is it d or c??

**Math**

Which is the best approximation of the volume of a cylinder with a radius of 10 mm, and a height of 5 mm? Use 3.14 for pi.

**math**

A square is folded vertically twice and the resulting perimeter is 20 cm.What is the peremeter of the square?

**Chemistry Chemical Reactions pls help <3**

2AgNO3 + CaCl2 ---> Ca(NO3)2 + 2AgCl all of the substances involved in this reaction are soluble in water except AgCl which forms a solid at the bottom of the flask . Suppose we mix together a solution containing 12.6 g of AgNO3 and one containing 8.4 g of CaCl2 .What mass ...

**Math**

Dixon and his little sister Ariadne stand next to each other on the playground on a sunny afternoon. Their mother measures their shadows. Dixon's shadow is 18 feet long and Ariadne's shadow is 15 feet long. If Dixon is 6 feet tall, how tall is Ariadne?

**Math**

What is the smallest of 3 consecutive positive integers if the product of the smallest and largest is 21 more than 9 times the middle number? x(x+2)=21+9(x+1) I'm not sure if this is a good equation to solve it..?

**science**

Friends are better than school Or you can learn about taxes not science Remind me to skip science Can't understand school- no meaning Everyone hates school

**Math**

write the first 10 multiples of 3

**math**

There are some caps in a box. 1/6 of them are red, 1/3 of them are blue and 3/7 of the remainder are green. If there are 27 green caps, how many caps are there altogether? How should I solve this?

**Social Studies**

thank you!

**Social Studies**

compare and contrast the experience of the creeks and cherokees in Georgia following the war of 1812 { could you please help me with this)