# Posts by Claire

Total # Posts: 716

**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)

**Intro to Chemistry**

Does the Periodic table have any kind of pattern for brittleness? If so, what is it? For example, the elements on the left are more brittle, while the ones on the right are less brittle.

**Math**

There are 18 silver cars, 13 red cars, and 11 brown cars in a parking lot. What fraction of the cars in the parking lot are not silver?

**Pre-Calculus**

Big Bob is trying to shape up for the summer. He begins on the first day of his exercise program with 3 sit ups. Each day he will do 4 more sit ups than the day before. On what day will Big Bob do 115 sit ups?

**word problem 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**

In science class, Savannah measures the temperature of a liquid to be 50^@ Celsius. Her teacher wants her to convert the temperature to degrees Fahrenheit. What is the temperature of Savannah's liquid to the nearest degree Fahrenheit?

**math**

please help*

**math**

Why do you have to use estimation to find the number of triangles you need for the string? {could you please me I don't understand

**Precalculus**

Show the first three terms of each related sequence or series and solve each problem. 1) Jerry hopes to buy a camera which costs $680. He plans to save $5 more each month than in the month before, beginning with $5 this month. In how many months will he have saved enough? 2) A...

**Math**

Which of the following problems would NOT have a solution? Five pizzas are shared equally among four people, and you want to know how much each person gets. Ten pizzas are shared equally among five people, and you want to know how much each person gets. Zero pizzas are shared ...

**Math**

Which number is not equal to one of the following expressions? 2,500 x 10 250,000 -: 100 2,500 -: 10

**math**

962?

**math**

declan works 37 hours a weeks and earns 26 dollars an hour declan earns how much in a week

**Math**

Dawn raises money for her school in a jog-a-thon. She will get three dollars for every lap she completes. If it takes 4 laps to jog 1 mile, and Dawn jogs a total of 12 miles, how much money will Dawn raise for her school?

**Math**

On an average day, 38 customers buy a bag of grapes at Jerry's Market. There are an average of 47 grapes in each bag. Round to the nearest ten and then multiply to estimate the number of grapes Jerry's customers buy every day.

**Math**

On an average day, 34 customers buy a bag of grapes at Jerry's Market. There are an average of 47 grapes in each bag. Round to the nearest ten and then multiply to estimate the number of grapes Jerry's customers buy every day.

**Math**

secondary math 2

**Math**

yea

**Math**

no its a exponent x with exponent -b

**Math**

simplify each expression. Your answer should still be in exponential form and only have positive exponents. x^-b

**Math**

two boats leave the same port at the same time. one travels at a speed of 29 mph in the direction N 50 degrees E and the other travels at a speed of 35 mph in the direction S 70 degrees E. how far apart are the two boats after an hour.

**11th grade math**

Simplify each expression. Your answer should still be in exponential form. Make sure that you combine all numbers with the same base. y^a/y^b

**11th grade math**

y^a/y^b

**math**

Simplify each expression. Your answer should still be in exponential form. Make sure that you combine all numbers with the same base. y^a/y^b

**math**

thanks

**math**

please help

**math**

Simplify each expression. Your answer should still be in exponential form. Make sure that you combine all numbers with the same base.

**math**

r^5s^3/rs^2

**math**

Simplify each expression. Your answer should still be in exponential form. Make sure that you combine all numbers with the same base. \frac{r^{5}s^{3}}{rs^{2}}

**Physics**

I have a question about a vector addition problem using the polygon method. Vector 1 has a magnitude of .1 and theta of 30 degrees. Vector 2 has a magnitude of .2 and a theta of 90 degrees. Vector 3 has a magnitude of .3 and a theta of 225 degrees. I'm confused because if ...

**Algebra**

Simplified it's 5n-4

**Math**

I suppose for 6x200 it's like 6x2x100?

**Physics**

6. A car traveling 64 km/hr (40 mi/h) brakes suddenly to avoid a dog crossing the road. It accelerated at a rate of -1350 mi/h2. What was its speed after 0.5 min?

**math**

The hundredth and thousandth places.

**Math**

An auditorium contains 315 occupied seats and was 7/9 filled. How many empty seats were there?

**Chemistry**

What happens when you mix ammonium chloride and sodium nitrate? I don't need any equations, just what would you see when you mix them together Thanks~

**math**

Well the smallest prime is 2, so now you've got 0.2 something If the hundredth digit is twice the tenth, then it should be 4. But the part about the GCF being 18 and 27 I don't get

**Algebra**

6.24 seconds. 15.6/2.5 = 6.24

**Algebra**

Um, I suppose it's (-0.7)-(-2.5)

**Algebra**

Height of K2 - 11,194 = height of Mt. Kenya. You can't solve this equation, there's not enough information given.

**unisa**

for anyone who wants to answer this. The person is probably talking about this articletheguardian(dot)com/world/2014/apr/07/india-elections-nehru-gandhi-dynasty

**Physics: Please help!**

I can't figure this out at all...Can someone please explain it to me? It has been claimed that an insect is the best jumper in the animal kingdom. This insect can accelerate at 3950 m/s2 over a distance of 2.3 mm as it straightens its legs. (a) Assuming a uniform ...

**Physics**

I cannot figure out this question, and it would be greatly appreciated if someone could help me out! :) It has been claimed that an insect is the best jumper in the animal kingdom. This insect can accelerate at 3950 m/s2 over a distance of 2.3 mm as it straightens its legs. (a...

**social studies**

Mesoamerica

**social study**

that's called commerce

**Math**

Can some please explain what I have to do to get the answer? An airplane passes directly over Seneca High School. A student at Cherokee High School, which is 4.3 miles away, finds the angle of elevation of the plane to be 19°. Find the altitude of the plane.

**Geometry**

Angles A and C are complementary, and angles C and B are supplementary. If Angle A = 45 degrees, what is the measure of angle B?

**Geometry**

YW bisects angle XYZ. The measure of angle XYZ = 80 degrees. Find the measure of angle XYW

**math**

Yeah thank you Pete...

**math**

I think it's D. Please answer still. Thanks

**math**

What will the graph look like for a system of equations that has no solutions? A. The lines will be perpendicular. B. The lines cross at one point. C. Both equations will form the same line. D. The lines will be parallel. Is the answer B?? Thank you

**language arts**

page 1738!

**chemistry**

25.0 ml of 15% NH4NO3 solution is diluted to 300.0 ml. What is the concentration of the diluted solution? .15% x 25=3.75ml Do I divide by 300ml and that's my answer?

**math**

A bus left the bus station with 90% of the seats full. After six stops, a total of 26 passengers got of the bus and 4 passengers boarded the bus. Now, 35% of the seats are full, How many seats are there on the bus ? 35%*2= 70%= 2*22=44 seats.

**Chemistry**

how much vinegar produces 0.240 moles of acetic acid?

**math**

An antique clock takes 5.5 seconds to chime at 3 o'clock. How long does it take to chime at 9 o'clock ? 5.5/2= 2.75x8=22seconds

**Language arts**

yeah the answer is c :)

**Science**

boi

**Science**

California's volcanoes formed as the result of what type of plate boundary?

**Math**

BUNNY IS RIGHT! I GOT A 60% TOO

**History help?**

1. is D. 2. C, well that's where it was started in NY, but it could be B because it had spread out to let people know about rights that women should have. I'll say B ?

**History help?**

1.Southern states began to leave the Union not long after this event: a.Lincoln read and established the Emancipation Proclamation b.the fighting at Fort Sumter in South Carolina c.The Battle of Gettysburg was lost by the South d.the election of Abraham Lincoln 1. A or B? I ...

**Math**

thanks!

**Math**

You can buy one 10 pack of AAA batteries for $5.49 and get one battery free, or you can buy two 4 packs for $2.98. Which has the lower unit price per battery? please help and show me the steps, thank you

**Chemistry**

A sample of gas (2.0 mmol) effused through a pinhole in 5.0 s. It will take __________ s for the same amount of to effuse under the same conditions.

**Math**

NO /' I I HEAT YOU AND THIS

**Science**

Which of the following electromagnetic waves is not used for communication?

**Chemistry**

Consider the following reaction: 4NH3(g) +5O2(g) -->4NO(g) +6H2O(g) Suppose we have two flasks connected by a stopcock. In one flask, we have 2.0L of NH3(g) at a pressure of .500 atm. In the other flask, we have 1.00L of O2(g) at a pressure of 1.5atm. When the stopcock is ...

**Math**

A) P is approximately (0.883, 0.469), is a point on the unit circle with angle 28 degrees estimate the following. Sin 152 degrees = Cos 152 degrees = please help me step by step

**chemistry**

When 2016 J of heat energy is added to 49.5 g of ethanol, C2H6O, the temperature increases by 16.6 °C. Calculate the molar heat capacity of C2H6O. 49.5g = 2.98mols C=q/n*temperature change in Celsius 2016/2.98*16.6

**mathematic**

The local skateboard company reports that when they produce and sell n skateboards in a week, the cost is represented by the modelc=850+76n . The revenue is represented by the model r=150n. If both C and R are in dollars, write an equation for the profit from producing and ...

**physics**

A spacecraft is in orbit close to the moon's surface. The centripetal acceleration is 1.6 m/s^2. If the radius of the moon is about 1.7 x 10^6 m, determine: a)the orbital speed b)the period of the orbit

**Science(Stuff to do like with magnets!)**

Lorenzo is correct! Don't listen to @zaynmalik1d.

**Social Studies**

Is it the inca

**science**

does kidney transplant always succesful

**Physics**

A 42.0 kg swimmer with an initial speed of 1.50 m/s decides to coast until she comes to rest. If she slows with constant acceleration and stops after coasting 2.00 m, what was the magnitude of the force exerted on her by the water?

**physics please help!!**

find the temperature of the hot reservoir of a carnot engine that has QH=1575j that does work on a 200kg crate, caussing it to go from rest to a velocity of 2.35m/s along the horizontal frictionless surface. Tc=100K

**math please help**

Limit as x approaches zero of (sinx-(x^3/6)/x^5)