# Posts by Bob

Total # Posts: 3,294

**Physics**

32

**Math**

Solve the equation: 4x^2 + 100 = 0 Here is my work: 4x^2 + 100 = 0 - 100 - 100 4x^2 =0 /4 /4 x = -5 or 5. Did I do this correctly?

**Algebra**

Write the expression in descending exponent form. -7y + 8y3 - y6 I think I have to combine like terms but I don't know how. Please help?

**SOCIAL STUDIES!**

Pop

**physics**

A positive test charge of 6.47 × 10^−5 C is placed in an electric field of 50.12 N/C intensity. What is the strength of the force exerted onthe test charge? Answer in units of N

**MATH**

NOლ(ಠ_ಠლ)

**algebra**

^^

**Physics**

yo mama

**Health**

someone give me th4e answer5 i 7dont have1 a11 d2y

**Trigonometry**

Which of the following is not a solution of the equation tan squared A =3? (1) -pie/3 (2) 2pie/3 (3) 5pie/6 (4) 120 degrees

**trig**

To the nearest degree, all of the following angles are solutions of the equation 2sin x + 4 cos 2x =3 except: (1) 40 degrees (2) 150 degrees (3) 166 degrees (4) 194 degrees

**physics**

12 kg

**Physics**

Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States ...

**Physics**

When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell. As a simple model of the supernova process, assume that the star is a...

**math**

the areas of two similar rectangles are 338 cm squared and 73 cm squared. what is the similarity ratio of the perimeters

**us history**

who developed the first fiscal plan?? was it hamilton and who was the author of the great compromise in constitution? was it madison

**MicroEcon**

Suppose that you supply bottled water in a competitive market and that you are producing the profit-maximizing quantity of bottled water. If you can sell your water at $2 a bottle and you currently employ five workers at a wage of $50 a day, what is the value of the marginal ...

**math**

poo

**science**

how to calculate calories is food

**Statistics**

Which of the following statements is not true about samples that can be treated as matched pairs data? I. Data collected on these samples is analyzed by calculating the differences between paired observations and using that data in one sample tests. II. Each value in the first...

**Physics**

C is the correct answer. Both have resistance to current (though the filament's resistance is most likely very small, compared to the resistor). Their combined resistance R1+R2, is the load.

**Math**

It is a square, so you have to find the area, which is length times width. The length is 24 rows and the width is 48 seats. So you do 24 X 48 which equals 1152, so the theater can hold 1,152 people.

**Math 8 - help!**

Y=4X + B

**Physics**

You need to use vectors because there is an angle and you know the initial velocity, and acceleration but not the final velocity. Make a picture and write out all information given to you in columns labeled X and Y directions. Then plug them into different kinematic equations ...

**Math**

IM TRYING TO FIGURE OUT THE SAME THING

**English**

8.deluged 9. Verges 10. logical

**physics**

what is the velocity of the object as a function of time? for 0s < t < 10s

**Pre algebra**

Thx

**Pre algebra**

On a map the scale is 1 cm:50 ft. The distance between the post office and the fountain is 6 cm. What is the actual distance?

**Math**

Find the general solution F(x,y)=C of the differential equation: (-3(x^2)y-8x)dy+(-3xy^2-8y)dx=0 Where F(x,y)=___________________

**Math**

11.

**algebra**

nt=440

**Physics**

A ball player hits a home run, and the baseball just clears a wall 20.6 m high located 132.0 m from home plate. The ball is hit an an angle of 35° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.1 m above the ground. (a) What ...

**math**

suppose you invest $500 in a savings account that pays 3.5% at an annual interest. When will the account contain $650?

**per-algebra**

whats the sequence,common difference or common ratio and the next three terms of the sequence of 10,18,26,34

**math**

;!_3#5(H((\)

**Geometry :)**

Thanks :)

**Geometry :)**

Use coordinate geometry to prove that the quadrilateral formed by connecting the midpoints of a kite is a rectangle. I have no Idea how to do this problem, so if anyone could help I would be very greatfull. :)

**7th grade art ASAP please**

This was perfect!!!!!!!!!!!!!!!!!!!!! All Correct. I just Got 100% on my quiz

**Algebra**

Factor the GCF out of 5x2 - 10x? I know I need to find the GCF of the coefficients but I need to write it using the distributive property. Help please?

**geometry**

What is the most precise name for quadrilateral ABCD with vertices A(–3, 2), B(–1, 4), C(4, 4), and D(2, 2)? 1. parallelogram 2. rhombus 3. quadrilateral 4. rectangle

**chem**

What volume of 0.250 M H2SO4 is required to titrate a solution containing 0.200 g of KOH to its endpoint?

**chemistry**

Calculate the density of M&M’s given the following data: Mass of 250.0 mL beaker = 197.816 g Mass of beaker and 20 M&M’s = 342.816 g Volume of water in graduated cylinder = 8.0 mL Volume of water in graduated cylinder and 10 M&M’s = 18.5 mL (Points : 3)

**chem**

A 14.3 L sample of gas at 23.45°C and a pressure of 123.45 kPa is heated until its temperature reaches 43.20°C and its volume is 16.72 L. What is the pressure of the sample of gas

**chemistry**

A student is asked to prepare 250.0 mL of 3.5 M copper (II) sulfate from solid copper (II) sulfate pentahydrate. Describe how this solution should be made in the chemistry laboratory.

**Chemistry**

Thx :)

**Chemistry**

solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. how many molecules of hydrogen gas are formed when 48.7 g of sodium are added to water? 2Na + 2H2O ------> 2NaOH + H2

**math**

12 nickels

**Math**

Explanation please

**Math**

Before 1986, a gold bullion in the Federal Reserve Bank was rectangular and had a volume of approximately 727.7 cm3. The density of gold is 19.3 g/cm3. A pound is approximately 454 g. Find the weight of one gold bullion to the nearest tenth of a pound.

**math**

1.1232 players 2. There are 29 teams because 438\15 =29.2 so there will be a remainder of 2 people. 3. There are 16 students on each team because 544/34 =16. 4. 96 people are on teams (P.S. /=division)

**math**

Which of the following values is in the solution set of the inequality -8-7x>-6 a) 2 b) -2 c) -3 d) -1

**chemistry**

The temperature of a dilute 0.847 M solution of NaBr was increased from 25 degrees Celcius to 40 degrees Celcius. What effect did this temperature change have on the molarity of the NaBr solution?

**ap chem**

The diatomic molecule OH exists in the gas phase. The bond lengthand bond energy have been measured to be 97.06 pm and 424.7 kJ/mol.Knowing that only the 2p orbitals of will interact significantlywith mol, respectively. Assume that the OH molecule is analogous tothe HF ...

**ap chem**

Show how a hydrogen 1s atomic orbital and a fluorine 2p atomic orbital overlap to form bonding and antibonding molecular orbitals in the hydrogen fluoride. Are these molecules sigma or pi molecular orbitals?

**ap chem**

nevermind i got the answer

**math**

Each time the same letter appears it represents the same digit.Different letters represent different digits.C+C=D;D+E=17;A+2C=D;2B+C=8.Find the sum A+B+C+D+E

**Math**

As an invesment Mrs. Astor purchased 2 paintings. She later sold the two paintings for $24,000 each. On one painting she made a 20% profit, but on the other she esperienced a 20% loss. Mrs. Astor lost__________ on her investments in the 2 paintings.

**math**

An escalator moves down at the rate of 60 steps per minute. Alan can walk fast up ordinary steps at the rate of 80 steps per minute. There are 50 steps from one level to another. Alan decides to walk fast up the down escalator. How long will it take him to go up one level?

**help hexagon geometry**

iiitss hahaha nto telling you

**help hexagon geometry**

That's not the answer hes dumb

**Statistics**

2 only

**math**

The points A, B, C, D, & E are located on a straight line, in order, in accordance with the following conditions: The distance from A to E is 20 cm The distance from A to D is 15 cm The distance from B to E is 10 cm C is halfway between B & D What is the distance from B to C?

**Physics**

i thank thee for leh answer :D

**Physics**

An electronic motor is revolving at 2000rpm. After 3sec, it is moving at 150rpm. Determine the angular acceleration. What is angular momentum of the electric motor if the rotational inertia is 18.kg.square meter in initial velocity? In final velocity? What is the average ...

**Grammar-clauses**

a,d,b,b,c,a

**Applied Behavioral**

diabetes

**Cps**

Tks. As I thought

**Cps**

HCl+CaCO3 --> CaCl+H3O balanced?

**french**

how do you unscramble eiuocrrl in French?

**Math**

ABC has vertices A(0, 6), B(4, 6), and C(1, 3). Sketch a graph of ABC and use it to find the orthocenter of ABC. Then list the steps you took to find the orthocenter, including any necessary points or slopes you had to derive.

**math**

Over a period of 5 games a basketball team made exactly 44% of their shots. the number of shots taken was more than 310 and less than 350. How many shots were made?

**algebra**

What are the coordinates of the point labeled A?

**math**

logan built an enclosure for his chickens. He wanted opposite sides to be parallel, but the adjacent sides to be different lengths. what was the shape of the enclosure?

**math**

Assuming that the temperature has to be below freezing in order for it to snow, if the probability of the temperature being below freezing tomorrow is 85%, and the probability of there being precipitation tomorrow is 25%, what is the probability that it will snow tomorrow?

**Fraction to decimal question**

Move is right

**Economics**

Your pay stub deducts money for FICA. What does this mean? A. Money is being withheld for personal exemptions and deductions. B. Money is being withheld for excise and estate taxes. C. Money is being withheld to fund Social Security and Medicare. D. Money is being withheld for...

**History**

Thank you Ms. Sue. I believe you have helped me in the past learn history. I'm homeschooled. So sometimes I do research on the internet for help. I came across some questions that you answered and your answers and links have really helped me understand history. Thanks :)

**History**

Ms. Sue. Do you have the answers for English 3 and 4 for Ashworth High School? I have completed all the other classes by myself. But if I don't finish English 3 and 4 by next week, I'll have to repay my tuition. Please help me!

**physics**

Suppose the roller coaster in Fig. 6-41 (h1 = 38 m, h2 = 11 m, h3 = 25) passes point 1 with a speed of 1.60 m/s. If the average force of friction is equal to one sixth of its weight, with what speed will it reach point 2? The distance traveled is 45.0 m.

**precalc/trig**

olve for the interval [0, 2pi]. cos(x+ pi/4)+cos(x- pi/4)=1

**algebra**

A store manager bought c calculators for $8. All but four were sold for $10 each. The remaining four calculators were not sold. Find the store's profit, in simplified form, in term of c.

**Algebra**

I solved the problem like that: Sara: 2x Miguel: x 2x+6 =4/3x 18/3 =4/3 -6/3x 6 = -2/3x x = - 9 so Miguel = -9 Sara = -18 Is it correct?

**Algebra**

Sara has twice as much money as Miguel. If she had $6 more. She would have 4/3 as much money as he has. How much money does each have now?

**chemistry**

3.00L

**GEOMETRY QUESTION**

4pi - 8

**HELP ME HELP ME GEOMETRY PROBLM!!!**

THANK YOU !!!!!!!

**Physics**

An 80 kg man climbs a 50 m-high hill in 20 minutes. What is the average power in watts he expends climbing the hill?

**Math**

A pizza shop tried 45 new type pizza during the past year and 20% percent of them became popular. Which best represents the fraction of pizzas that did not become popular?

**Math**

A pizza shop tried 45 new type pizza during the past year and 20% percent of them became popular. Which best represents the fraction of pizzas that did not become popular?

**Chemistry**

Br7C

**Physics**

The diagram below shows a large cube of mass 25 kg being accelerated across a frictionless level floor by a horizontal force, F. A small cube of mass 4.0 kg is in contact with the front surface of the cube. The coefficient of static friction between the cubes is 0.71. What is ...

**wierd math question**

11/36

**counting and probability**

Total number of numbers using 1-6 = 6^8 = 1679616 For any number to be divisible by 8, its last 3 digits must be divisible by 8 but these last two digits must contain only the digits from 1 to 6, with no zeros. possible cases are: 112 136 144 152 216 224 232 256 264 312 336 ...

**probability**

The digits 2, 3, 4, 7, and 8 are each used once in a random order to form a five-digit number. What is the probability that the resulting number is divisible by 4? Express your answer as a common fraction.

**math**

I look at a random time of day at a digital clock (that shows times from 1:00 through 12:59). What is the probability that (ignoring the colon) I see a palindrome such as 8:08? Express your answer as a common fraction.

**Calculus**

A wire 4 meters long is cut into two pieces. One piece is bent into a square for a frame for a stained glass ornament, while the other piece is bent into a circle for a TV antenna. To reduce storage space, where should the wire be cut to minimize the total area of both figures...

**college algebra, Please help!!**

fu