# Posts by JO

Total # Posts: 489

**Physics**

Okay, I'm really confused in general. My question says: "A solid piece of clear transparent material has an index of refraction of 1.61. If you place it into a clear transparent solution and it seems to disappear, approximately what is the index of the refraction of ...

**algebra**

An object is thrown straight up into the air at an initial vertical velocity of 32 feet per second from an initial height of 128 feet and is represented by the vertical motion model, h(t) = -16t^2 + 32t + 128. How much time does it take for the object to reach its maximum height?

**algebra**

How much of a solution that is 45% sulfuric acid needs to be mixed with a solution that is 90% sulfuric acid to produce 120 liters of a solution that is 60% sulfuric acid?

**algebra**

How much of a solution that is 45% sulfuric acid needs to be mixed with a solution that is 90% sulfuric acid to produce 120 liters of a solution that is 60% sulfuric acid?

**Math**

Felicia makes 1/2 gallon of fruit punch. She pour an equal amount into 8 glasses. What fraction of the fruit punch in each glass

**math**

-4+7x+4=8 direct vriation

**math**

the sum of two numbers is 20.one number is 3 time the other number . find the two numbers?

**math**

if the terminal side of an angle , theta, passes through the point (3,-5). find sin(theta)

**math**

TWO YEARS AGO, KIM INVESTED RMP AT HER ACCOUNT WHICH EARNS r% simple interest . after eighteen months , she noticed that the amount had become rm 10450 and today amount is rm 10600 . FIND THE VALUE OF p and r

**Math**

If Mrs. Jacobsen wants to buy the item with the unit price , what item should she order and how many of that item should she order?

**Math (statistics)**

Suppose an employee starts working after completing her MBA at age 30 at a starting salary of $50,000. She expects an annual salary increase to be at minimum 1%, at maximum 5%, with a uniform distribution. Her retirement plan requires that she contribute 8% of her salary, and ...

**Math**

How to find the transformations of these graphs of equations? 1. y=(x+2)^2-3 2. y=3x^2-6 3. y=-2(x-4)^2+5 Please teach me..

**Science**

Kinetic energy equation = 1/2mv^2 1/2(50 kg)((10m/s)^2) would result in something along the lines of 2500 joules...

**math**

Okay, well to find the area of a square you would need to do one side times another side which would result in the area. According to this equation in polynomials, it would be (2x+5) cm times (2x+5) cm.... Once you FOIL these sides together you should get something on the ...

**Physics**

Two parallel straight wires are 1 meter apart. Each wire carries a current of 2 Amperes in the same direction. What is the resultant magnetic field produced by both wires at a point: 2) 1/4 of the distance between them I don't really understand what 2 is saying to be real ...

**Physical Educationcal Educationcal**

What is the role of 1mile running? ( like important things, teaching points ) I need to find for P.E. class.. Please introduce me some good websites

**Art**

Hundertwasser who was born in December15, 1928 in Austria and died in February19, 2000. What do you think about characteristics of his work?

**English**

If you suddenly lost everything, what would you miss most?

**P.E.**

What is Conditioning coach and Conditioning activities..?

**English Writing**

Please bring something interesting to share with the class tomorrow. It can be anything that you have seen/heard/read recently in English (an article, a song, a new phrase, a short video, a picture of a sign you saw, etc). It needs to be appropriate of course! Do you have ...

**Statistics**

Conclude H0 if TS is less than or equal to 1.645

**Phyics**

A 56 kg astronaut stands on a bathroom scale inside a rotating circular space station. The radius is 250 m and the bathroom scale reads 42 kg At what speed does the space station does the floor rotate

**calculus**

A running circuit is to be constructed in the shape of a rectangle with two semicircles attached at the east and west ends of the path (see figure). A picnic area will be set in the center of the circuit. If we want the total length of the circuit to be 2000 m (2km ), what ...

**calculus**

A printed page is to have 1 in. margin on all sides. The page should contain 80 sq. in. of type. What dimensions of the page will minimize the area of the page while still meeting the other requirements?

**Science**

A piece of lead at 100 degrees celsius has a mass of 500 grams. It is placed in a 200 grams of water at 20 degrees celsius that is contained in an aluminum caloriemeter with a mass of 400 grams. If the final temperature of lead, water and caloriemeter is 24 degrees celcius, ...

**Maths**

Solve the problem - How many three digit numbers do not contain a five? Show evidence of solving the problem in a systematic way.

**Maths**

Solve the problem - How many three digit numbers do not contain a five? Show evidence of solving the problem in a systematic way.

**Math**

Week 1 42hours(including 4 hrs sick leave,6 hrs travel) Week2 46 hours(including 5 hrs travel) What percentage of the recorded time did the worker spend traveling

**Math**

56

**Ed Tech**

1. plot 2. setting 3. characters

**social studies**

How are interest rates and wages similar? A. Both rise due to inflation. B. both are types of prices. C. Both relate to the cost of borrowing. D. Both are payment for work done. i feel like it is D or b? please help

**social studies**

Sorry. I just needed an answer quick

**social studies**

bump

**social studies**

How are interest rates and wages similar? A. Both rise due to inflation. B. both are types of prices. C. Both relate to the cost of borrowing. D. Both are payment for work done. i feel like it is D or b?

**Math**

one more, -4n + 7 + 2n = 1 n= 3?

**Math**

How do you simplify this expression? 5(x+10)+x 6x+50 is the answer?

**math**

I did 21 divided by 8 = 2.625

**math**

7x/8 = 21 i am kind of confused on this

**math**

thanks

**math**

my teacher just asked me for the simplified expression

**math**

How do you simplify this expression? -12 / 3 x (-8+(-4)^2 - 6) +2 I got -8+2. Is this right?

**math**

Complete 25:35=5 :?

**Math**

The difference between 2 numbers is 14.When the greater number is divided by the lesser, the quotient is 2 and the remainder is 5.What are the numbers?

**Linear Algebra**

Stop cheating for mth2021

**math**

**In the Figure KE is parallel to LF which is parallel to MG which is parallel to NH etc. Also DK: KL= 2:1 DL:LM = 2:1 DM: MN=2:1 etc If KE = 2 cm , calculate the length of the 10th parallel line,rounded off to one decimal place.(N.B NH is the 4th parallel line)

**Math**

An Equilateral Triangle Of Side 20cm Is Inscribed In A Circle.Calculate The Distance Of A Side Of The Triangle From the Centre Of The Circle.

**Math**

a jar contains 26 fluid ounces of spaghetti sauce, how many cups of spaghetti sauce do 4 jars contain?

**Chemistry**

A chemist reacted 0.05 moles of sodium with water to form 50cm3 of sodium hydroxide solution. Na + H2O -- NaOH + H2 (unbalanced) What mass of sodium was reacted?

**Art**

Correct!

**Art**

That is correct!

**geometry**

What is the ratio of the area of sector AOB to the area of sector COD? 1/3,1/4,1/9,3/8

**Biology**

CCAB

**Please help!!**

It's 7,000

**Physics**

A 25 kg box is dragged across a floor by a rope that makes an angle of 60 degrees with the horizontal. The tension in the rope is 100 N while the box is dragged 15 m. A) how much work is done by tension? B) how much work is done by gravity?

**math**

A ball is launched from a slingshot. Its height, h(x), can be represented by a quadratic function in terms of time, x, in seconds. After 1 second, the ball is 148 feet in the air, after 2 seconds the ball is 272 feet in the air. Find the height in feet of the ball after 6 ...

**Chemistry**

jjj

**math**

The large red equilateral triangle has sides of 8x units. The midpoints of the red triangle are joined to form the blue triangle. The midpoints of the blue triangle ate joined to form the green triangle. The process of joining midpoints to form new triangles continues ...

**math**

The large red equilateral triangle has sides of 8x units. The midpoints of the red triangle are joined to form the blue triangle. The midpoints of the blue triangle ate joined to form the green triangle. The process of joining midpoints to form new triangles continues ...

**Math**

67

**Math**

Construct the 2 x 3 matrix B=[b_ij] where b_ij= (-1)^i+j(i^2-2j)

**Math**

Thanks :)

**Math**

Express log z+ 2 log y - 3log x as a single logarithm.

**ENGLISH**

(before he ate dinner) AND (in the morning)

**ENGLISH**

1. Joseph ate dessert before he ate dinner. --> Are the capitalized words a phrase or a clause? Answer: Clause. 2. She left early in the morning. --> Are the capitalized words a phrase or a clause? Answer: Phase. IS THIS CORRECT?

**english**

Define verb tense. Write a sentence that has a simple present tense verb. Rewrite it, changing the verb to simple past tense, simple future tense, each of the perfect tenses, and each of the progressive tenses.

**math**

if you spend 4/7 of your money and have $15 left how much did you spend

**Calculus**

For this problem, first draw a 3D rectangle and label the width as "x", the length as "3x" and the height as "y". This will help you visualize the area formulas presented. Area Formulas: Area of top and base= 2(3x)(x)= 6x^2 *This is multiplied by ...

**Math**

A circular pool 10m wide in diameter has a deck 2m wid around it. What is the area of the deck?

**Psychology**

An extremely loud noise awakens you; you emerge from sleep confused and do not remember the noise. You were most likely in which stage of sleep. a. Stage 1 b. Stage 2 c. REM d. Stage 4 e. Twilight Sleep

**Physics**

You testify as an expert witness in a case involving an accident in which car A slid into the rear of car B, which was stopped at a red light along a road headed down a hill (Fig. 1). You find that the slope of the hill is Ɵ = 120 , that the cars were separated by ...

**algebra**

why is 0.57 considered a rational number?

**Math**

^^^^^^^ That was me btw :)

**Math**

Do the following points represent a point on the graph of y=x-4? (0,-4) (5,-1) is this neater?

**Math**

Do the following points represent a point on the graph of y=x 4? (0.-4) (5,-1)

**Math**

the half life of a radioactive substance is one day. You have 100 grams. how much of the substance would be left after a week?

**Chemistry**

Calculate the molarity of a solution made by adding 33.4 mL of concentrated nitric acid (70.4 % by mass, density 1.42 g/mL) to some water in a volumetric flask, then adding water to the mark to make exactly 2000 mL of solution. (It is important to add concentrated acid or base...

**Chemistry**

Moles of potassium nitrite (in 536g) would be 6.29 or 6.3 moles, correct?

**Chemistry**

I forgot to add the equation so here it is: 2KNO3(s) ---> 2KNO2(s) + O2(g)

**Chemistry**

How many grams of potassium nitrate (KNO3) are required to produce 536 g of potassium nitrite (KNO2) according to the equation below? *I've tried this question for so long and I get so many different answers in the end so please help.

**business**

A proportionate tax consumes a determinate apportionment of one’s monetary flow.

**Physical Chemistry**

If a 30g piece of ice at -5C is immersed in 125mL of water at 25C in an insulated container... A. Determine the final temperature and final composition of the system B. Determine the entropy changes of the ice and the water and the overall entropy change of this process.

**math - relations and functions**

What is mean , Write a set of 10 ordered pairs that represent a function?

**Physics**

An optical fiber is made of a clear plastic with index of refraction n=1.6, For what angles with the surface the light remain contained within the plastic guide?

**physics**

A stone is thrown into water pond forming 10 waves in 5 seconds. The diameter of the first crest is 13 m and the diameter of the last crest is 4m. Find a.the periodic time b.the frequency c.the wave length d.the wave velocity

**math**

Classic Furniture purchases dining room sets with an invoice date of September 27, and terms of sale of 3/10, n/60. What is the net date? A) October 17 B) October 22 C) November 2 D) November 26

**Mechanics**

A 1-kg ball in the air has an initial velocity vo = [ 20 ] i + [ -30 ] j m/s. It falls for a total time of 1 s. Assume that positive x-values are to the right and positive y-values are upward. A)What is the impulse or change in momentum Delta p of the ball? B)What is the final...

**physics**

The acceleration of gravity is 9.8 m/s 2 . What is the magnitude of the total force on a(n) 87 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 41 m/s in 5.3 s? Answer in units of kN

**POL 201**

torn between A and C

**POL 201**

_______ is core to the notion of “life, liberty and the pursuit of happiness” in the Declaration of Independence. (Points : 1) Human agency Pure unfettered liberty the idea that government may never restrict citizens’ liberty the concept of American exceptionalism

**POL 201**

Thank U

**POL 201**

A?

**POL 201**

If Americans were said to have a positive liberty to work, then the government (Points : 1) may not prevent one from working. is required to provide jobs to those that cannot find jobs. may never pursue a policy that leads to unemployment. must prohibit discrimination in the ...

**ashford**

Those who attended the Constitutional Convention believed that (Points : 1) England was an evil society. America had made a great mistake in fighting the revolutionary war. British institutions of government were good but they became corrupt. America would only achieve ...

**math**

In three successive years the price of the common shares of Bedrock Resources Ltd. fell 40%, 60%, and 70% ending the third year at 50 cents. How much (in dollars and cents) did the share price drop in the second year?

**physics**

A box slides down a 28° ramp with an acceleration of 0.98 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.

**chemistry**

what could cause the difference in the actual number of mole and the expected number of mole in copper oxide?

**chemistry**

what is the molar ratio of 0.114 copper to 0.116 oxygen? Then how do you make an empirical formula from this information?

**chemistry**

in a empirical formula lab how do you calculate the number of moles of Cu in 0.0114 moles of CuSo4*H2O? Thanks

**calculus**

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. x+y=4,x=5−(y−1) 2 ;

**physics**

A hunter wishes to cross a river that is 1.0 km wide and that flows with a speed of 4.9 km/h. The hunter uses a small powerboat that moves at a maximum speed of 9.6 km/h with respect to the water. What is the minimum time necessary for crossing?