# Posts by Josie

Total # Posts: 120

**tech**

do catapults use an overhand or underhand motion? what about pendulums?

**Chemistry**

"What volume of water must be added to 100ml of 15 M of H2SO4 to dilute to 5.0M?" I've tried using lots of different methods but keep having the same answer and don't know if the answer book is wrong or if it's me. Thanks!

**hypothesis**

Yeah, but why do we need to test the results?

**hypothesis**

Why is it important to test the results of a hypothesis?

**math**

can't see the boxes. are there addition or multiplication problems? what does it look like?

**All**

because they didn't submit medical documentation for proof of absence.

**Math**

Which is 9%?

**Math**

Oh! So, then the relative rate is: R1/R = 30-.6q/30q-(0.3q^2) ?

**Math**

The revenue obtained from the sale of q units of a product is given by : R= 30q-(0.3q^2) A) How fast does R change with respect to q when: q=10 B) Find the relative rate of change of R, and to the nearest percent, find the percentage rate of change of R.

**Math**

Purchased 297 square feet of carpet at $18.50 a square yard, what is the cost? 297 / 9 = 33 yards X $18.50 =$610.50 Do I divide by 3 again to get $203.50?

**Math**

(4 to the second power divided by two)subtract 2 to the second power plus five

**History**

1) A 2) D 3) A 4) B 5) C 6) C 7) D 8) C 9) C 10) A

**American government**

Beccky is right 10-10 (100%)

**geometry**

ray EC bisects angle BED, The measure of angle AEB equals 11x minus 12.and The measure of angle CED equals 4x plus 1.. Find measure of angle AEC.

**math**

-3

**math**

i don't know

**Science 8**

I actually think it is C but i am not sure either

**Math**

There are 41 students in group 2. Twice as many students play the trumpet as play the trombone, but 8 students play the saxophone. How many students in Group 2 play each instrument? Endless thanks

**Math**

Simplify this expression. -12÷3•(-8+(-4^2)-6)+2. I'm confused on how to solve this. Thank you for the help.

**Chemistry**

Is Vanila a compound ? Is butter a compound ? Is sugar a compound? Is Brown sugar a compound ?

**gum**

I think its C or B

**Algebra-VERY IMPORTANT**

Given the polynomial x^2+10x+k Find all the values of k so that this given polynomial is factorable

**College Physics**

Two cars collide at an icy intersection and stick together afterward. The first car has a mass of 1050Kg and was approaching at 8.00m/s due south. The second car has a mass of 700Kg and was approaching at 20.0m/s due west. A) Calculate the final velocity of the cars.(Note ...

**Math**

a baseball team played a total of 138 games last season. They had 26 fewer wins than losses. How many games did the team win?

**physics**

A ball is thrown directly downward with an initial speed of 3.08 m/s from a height of 14.6 m. After what interval does the ball strike the ground? The acceleration of gravity is 9.8 m/s 2

**chemistry**

Why is respiration an exothermic reaction?

**Chemistry**

What type of reaction is photosynthesis, the process where carbon dioxide combines with water to form glucose in the presence of sunlight?

**chemistry**

In an experiment, Ann mixes concentrated sulfuric acid with water in a reaction test tube. The walls of the test tube turn hot. What type of reaction has occurred?

**Algebra**

Total revenue is the total amount of money taken in by a business. An appliance firm determines that when it sells X washing machines, the total revenue, R, in dollars, is given by the polynomial R=232.94x-0.1x^2. What is the total revenue from the sale of 238 washing machines...

**Algebra**

Total revenue is the total amount of money taken in by a business. An appliance firm determines that when it sells X washing machines, the total revenue, R, in dollars, is given by the polynomial R=232.94x-0.1x^2. What is the total revenue from the sale of 238 washing machines...

**Algebra**

Solve using the appropriate method. 0.05x+0.25y=66 0.15x+0.05y=72 I came up with the answer (420,180) Is this correct? a)The solution is___?(simplify your answer. Use integers or fractions for any numbers in the expression. Type an ordered pair) b)Infinitely many solutions c)...

**Physics**

You are pulling a crate across the floor. The crate has a mass of 75.0 kg. You exert a horizontal force of 120. N to the left. Friction exerts a force of 82.0 N to the right. What is the magnitude (fill in box) and direction of the acceleration of the crate?

**Physics**

1.5

**AP Calculus AB**

Find the derivative of: y=(cosx)^3-(sinx)^3

**PHYSICS**

If a boy(500N) wishes to slide down a rope that has a breaking stand of 350N, then: (a) with what acceleration must it move downward in order to not break the rope. (b) if he slide 30m, how long will it take? (c) how fast will he be going before he hits the ground?

**PHYSICS**

Thank You!

**PHYSICS**

The tension in the cable supporting a 4900N elevator is 3800N. What is the acceleration of the elevator?

**English**

We plant two bean seeds in different pots. What's the subject?

**Physics**

Note: I used PV=nRT to solve (there are 0.400 mol), but the answer I got was incorrect; the hint I received was that all the water has evapourated.

**Physics**

A cook puts 7.20 g of water in a 2.00-L pressure cooker that is then warmed to 530°C. What is the pressure inside the container? (Assume room temperature is 20°C.)

**Physics**

A 2.60-mol sample of oxygen gas is confined to a 5.03-L vessel at a pressure of 7.95 atm. Find the average translational kinetic energy of the oxygen molecules under these conditions.

**Physics**

Three uniform spheres of masses m1 = 3.50 kg, m2 = 4.00 kg, and m3 = 6.50 kg are placed at the corners of a right triangle (see figure below). Calculate the resultant gravitational force on the object of mass m2, assuming the spheres are isolated from the rest of the Universe...

**physics**

The free-fall acceleration on the surface of Jupiter is about two and one half times that on the surface of the Earth. The radius of Jupiter is about 11.0 RE (RE = Earth's radius = 6.4 106 m). Find the ratio of their average densities, ρJupiter/ρEarth.

**French**

Est-ce que je pourrais poser des questions? Puis-je poser des questions?

**Physics**

Oh. F(along radius) = ma μmg=mv²/r μg=v²/r μgr=v² v²=(0.550)(9.80)(37.9) v ~= 14.3m/s

**Physics**

A crate of eggs is located in the middle of the flat bed of a pickup truck as the truck negotiates a curve in the flat road. The curve may be regarded as an arc of a circle of radius 37.9 m. If the coefficient of static friction between crate and truck is 0.550, how fast can ...

**French**

*Quand est-ce que tu es né(e)? D'être un peu plus poli(e): **Quand est-ce que vous êtes né(e)(s)? "est-ce que" ("is it that"), not "est que" ("is that").

**algebra**

A boat can travel 16 km/h against the current.The same boat can travel 30 km/h with the current.find the rate of the boat in still water and the rate of the current. Could someone help me.it seams like an easy problem, but I am not getting there.Thank YU very much.

**Physics**

You are standing on top of a building that is 75-m high and you throw a 3-kg stone horizontally at a speed of 5.4-m/s. How far from the base of the building will the stone land? (the ground is flat)

**algebra**

A shipment of 18 cars, some weighting 3000lbs a piece, and the others weighing 5000 lbs each, has a total weight of 30 tons. Find the number of each kind of car. I start of saying X+Y = 18. THen I turn that into X=18-Y. whats next?? thank you for helping if u can.

**algebra**

Solve the following system of equation using the graphing method. Y = negative X Y = X + 9 Don't know what to do. Thank u if u can helpme.

**algebra**

but the x is already there in the first digit because it is somethin=x and shouldnt it be : x-0.25 = 6000?? why x - 0.25x = 6000??

**algebra**

and where did you get 0.75 from??

**algebra**

Wy did you put 0.25x in the first line? x reps what?

**algebra**

what number minus 25% equals 6000?

**Co-op**

yes but the male to female ratio and stuff like the graphss that will all be different..please help me:( Can you just help me with these parts for the pharmacy technician : - Required skills: a) job specific skills b) Transferable skills - Employmentoutlook for future salary ...

**algebra**

a minus the fraction a^2-a-6 over 2(a-3) thank you

**algebra**

please help because am missing something.thankyou factor completely given that x+2 is a factor. 2x^3 + 7x^2 - 3x - 18

**Algebra**

Didnt write my question too good last time so here is what I meant. This is a mixed ezpression written as fraction and then to be put in simplest form. 3/1 minus 2x-2/x^2-1 thank you

**Algebra**

Didnt write my question too good last time so here is what I meant. This is a mixed ezpression written as fraction and then to be put in simplest form. 3/1 minus 2x-2/x^2-1 thank you

**algebra**

Please help THANKS write as a fraction in simplest form (a/b +1)(b/a-1)

**algebra**

3 - __2X-2______ X^2-1 Write the expression as a fraction in simplest form. 3 minus 2x-2 over xsquared minus 1 Can anyone help?

**Algebra**

What is 2a^2 over 4b times b^2 over a^2 or what is 2a squared over 4b, times b squared over a squared ? Thankyou

**Algebra**

Help Please! 2n(x-n)=x-5n+2 Solve for X

**pre-calc**

F(x)= x^2+x-12/ x^2-4 find the x and y intercepts and find x when f(x)=1

**math**

hey Anabelle what is 55-10

**math**

what graphs are there Ms Sue just tell me

**math**

i don't know what the graph is called

**math**

i don't know what kind of graph it is

**math**

your welcome Anabelle

**math**

a median is the middle

**algebra**

For the statement that says: b + (-a) = b - a What property would that be? Is it the addition property of equality? or something else.

**Algebra**

The total amount of water in 2 containers is 35quarts. If 7 quarts gets poured from the container with less water into the continer with more water, the container with more water will have 4times as much water as the other container. How many quarts are in the container with ...

**University of Phoenix**

target marketing in contrast to mass marketing

**HCA 270**

What is the relationship between inventory and cost of goods sold by a pharmacy or medical supply business? Explain the depreciation concept. What items in a physician practice can be depreciated? What is the purpose?

**analyzing poem**

How does the tone change from the first half to the last half of the poem?

**Chemistry**

Got it - thank you.

**Chemistry**

1. What mass of carbon is required to produce 100kj of heat, when burned in air? Enthalpy change = -392kj. 2. What mass of methanol is required to produce 1000kj of heat, when burned in air?

**algebra**

Kayla Wants To write an Expression that will always produce an odd integer. Which of the Following will always produce an odd integer for any given integer ?

**science**

An object is traveling in a straight line in space.No forces are affecting it. What will happen to the object's motion?

**science**

A book is on top of a table. Earth's gravity exerts a constant force of 15N on the book. Why does the book not move as a result of this force?

**Physics**

A JFET has a specified pinch-off voltage of -5V. When VGS = 0, what is VDS at the point where ID becomes constant?

**COLLEGE CALCULUS.**

hey mily how u get result for m?

**COLLEGE CALCULUS.**

Use implicit differentiation to find the equation of the tangent line to the curve xy^3+xy=5 at the point (4,1) . The equation of this tangent line can be written in the form y = mx+b where m is:? and where b is:?

**Chemistry**

Perform the following calculations to the correct number of significant figures. (89.6-23.981)/0.0047

**physics**

F(along radius) = ma μmg=mv²/r μg=v²/r μgr=v² v²=(0.590)(9.80)(36.5) v ~= 14.5m/s

**math**

at the beginning of the week a particular stock sold for 29 3/8 per share. at the end of the same week it sold for 31 2/8. what was the amount of inctrease per share?

**math**

105 miles

**Chemistry**

All I know is that Marcus is wrong because solids don't have to become liquids before they become gas. That is what is the case with dry ice. It becomes a gas before it has the time to go to a liquid.

**Calculus**

For f(x)=lnx, construct tables, rounded to four decimals, near x=1, x=2, x=5, and x=10. Use tables to estimate f'(1), f'(2), f'(5) and f'(10). Then guess a general formula for f'(x).

**Calc**

Use a graph to estimate the limit: lim θ->0 (sin(5θ)/θ) Note: θ is measured in radians. All angles will be in radians in this class unless otherwise specified. I tried graphing it on my calculator but the limit I got is incorrect.

**Calc**

Sorry! That was a typo. It was as the limit approaches 4. I'm still confused on how to find the y intervals.

**11th grade math**

what is the perimeter of the smaller triangle

**english**

can you answer this one into correct dangling modifier.Having wrapped up the package carefully it should be tied.

**Physics**

A 0.400 kg block of wood hangs from the ceiling by a string, and a 0.0700 kg wad of putty is thrown straight upward, striking the bottom of the block with a speed of 5.80 m/s. The wad of putty sticks to the block. Is the mechanical energy of this system conserved? yes or no (b...

**chemistry**

if you have 5 moles of conjugate acid, 2 moles of base, and 2 moles of acid. What is the dissociation constant for his reaction and the temperature is 30 degree celcius?

**science**

I am doing a case study on MMR and MMR/Autism. The question I have been given is 'Does MMR cause autism?" Please can you suggest any websites etc. I need to find at least 5 sources to show for and against. Many thanks.

**Precalculus(NEED HELP ASAP PLEASE!!)**

If sin t=-1/4, find sin t + 6pi

**law**

what are laws