# Posts by Bob

Total # Posts: 3,268

**Math**

When Alina was hungry she ate c cookies, which was 30% of all the cookies she had. How many cookies did she have in the beginning?

**Math**

There were d passengers in the train. 15% of all of them went in the first car, 20% went in the second car. How many passengers were in the rest of the train?

**Math**

This 3 demensional shape has 7 faces that are rectangles as well as two bases that are polygons. What is this shape ?

**Math**

This 3 demensional shape has 7 faces that are rectangles as well as two bases that are polygons. What is this shape ?

**Geometry **

This 3 dimensional shape has 6 faces that are triangles as well as one base that is a polygon. what is this shape?

**Math **

I am a 3 dimensional shape whose 8 faces are equilateral triangles. What am I?

**5th Grade English Grammar**

Are the answers: colorful, more colorful, most colorful late, later, latest northern, more northern, most northern troubled, more troubled, most troubled straight, straighter, straightest friendly, more friendly, most friendly dry, drier, driest safe, safer, safest useful, ...

**5th Grade English Grammar**

worst is worst, worst, worst?

**5th Grade English Grammar**

positive comparative superlative for troubled, straight, friendly, dry, safe, useful, flat, willing, blue, worst, and sad. Thanks.

**Math**

Let's say you flip 2 coins simultaneously. There are 3 possible outcomes: Both are heads, both are tails, or one is heads and the other is tails. Does this mean that the probability of getting one head and one tail is 1/3?

**Math**

Let's say you flip 2 coins simultaneously. There are 3 possible outcomes: Both are heads, both are tails, or one is heads and the other is tails. Does this mean that the probability of getting one head and one tail is 1/3?

**Calculus**

Consider the equation xy2 ? x2y = 6. (a) Find all points on the graph when x = 2. (b) Find a formula for dy dx in terms of x and y. (c) Find the tangent lines for the points you found in the ?rst part

**Caclulu**

consider the function f(x) = 9/x^3 -10/x^7 let F(x) be the antiderivatice of f(x) with F(1)=0 then F(x)=

**Caclulus**

A particle is moving as given by the data below 4sin(t)-3cos(t); s(0)=0

**Calculus**

A particle is moving as given by the data below 4sin(t)-3cos(t); s(0)=0

**Calculus**

consider the function f(x) = 9/x^3 -10/x^7 let F(x) be the antiderivatice of f(x) with F(1)=) then F(x)=

**Calculus**

Consider the function f(x)= x^3+5 sqrt(x) Let F(x) be the antiderrivative of f(x) with F(10=-9

**Calculus**

Find the anti derivative for 4/(x^2+1)

**Calculus**

Apply the concepts of calculus (limits and derivatives) to describe the graph y = sec(x). Include a quality graph

**Chemistry**

1. The decomposition of acetaldehyde is a second order reaction with a rate constant of 4.71 × 10^?8 L/mol/s. What is the instantaneous rate of decomposition of acetaldehyde in a solution with a concentration of 5.55 × 10^?4 M? 2. The rate constant for the first-...

**Calculus**

Find all solutions to the equation with 0 is less then or equal to a is less then or equal to 2pi Give an exact answer if possible, otherwise give value(s) ofa accurate to at least four decimal places. 4tan(a)+5=2 a= how do i find a

**Trigonometry**

That doesnt really help me solve for theta

**Trigonometry**

If possible find a solution to 2 cos(theta)=-0612. theta=

**Calculus**

Find all solutions to tan(theta)=1/sqroot(3). In the interval 0 less then or equal to theta less then or equal to 2pi. Theta=

**Calcalus**

Solve the equations below exactly Give your answers in radians, and find all possible values for t If there is more than one answer, enter your solutions in a comma separated list (a) sin(t)= sqroot(2)/2 when t= (b) cos(t)=1/2 when t= (c) tan(t)=-1 when t=

**Calculus**

If cos of theta= -7/12 and theta is in quadrant 2 then find a. tan(theta) cot (theta)= b. csc(theta) tan(theta)= c. sin^2(theta)+ cos^2(theta)=

**Algebra 2**

Claire has borrowed $\$5,\!000$. She plans to pay off the loan in full after two payments. She will make one payment in 3 years, then another payment in 6 years. The second payment will be exactly double the amount of the first payment. How much is the first payment if the ...

**Algebra 2**

Claire has borrowed $\$5,\!000$. She plans to pay off the loan in full after two payments. She will make one payment in 3 years, then another payment in 6 years. The second payment will be exactly double the amount of the first payment. How much is the first payment if the ...

**English **

Is under a preposition? True or False.

**Math**

hjd

**precalc**

Suppose that u=log(2) and v=log(5). Find possible formulas for the following expressions in terms of u and/or v. Your answers should NOT involve any log's. a) log(0.4)= b) log(0.08)= c) log(2500)=

**math**

24sqrt3-36

**science**

Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time period not really considered a part of Earth’s ...

**Math**

your cousin borrow 5000 at an interest rate of 7.5% and the rest at an interest rate of 12% the total paid is 819 . how much did your cousin borrow at each rate

**Math**

Describe a real world situation that could be represented by planes slicing a three dimensional figure to form cross sections

**Calculus**

In 1979, a biologist Reto Zach published a study on how crows drop whelks, a type of mollusk, from a height that minimized the amount of energy spent to break open the shells. Drop from too low a height, and the bird has to pick the shell up many times before it breaks. Drop ...

**Calculus**

Quotient Rule: Use the limit definition of the derivative to prove that the quotient rule

**math**

Steve is correct

**Mechanical principles **

A car initially at rest experiences uniform acceleration of 5 m/s2 for 6 sec. It maintains constant velocity for 14 sec and is then brought to rest in 5 sec by a uniform retardation. a) Using the formula, find out how far the car has travelled. b) Find the total angular ...

**Data**

Bridget works part time in a shoe store. Sometimes when it is not busy, she rearranges the shoes for fun. If she takes six different pairs of shoes and rearranges them in a row, in how many ways can she rearrange them so that no two shoes match? Is the answer 478 955 520 or ...

**Math ASAP**

In a survey, one out of three people named blue as their favorite color. Two out of seven named red. If 1,092 people were included in the survey, how many named neither blue nor red as their favorite color? A. 416 people B. 432 people C. 540 people D. 512 people

**Math**

2. Write a ratio for the situation in three ways comparing the first quantity to the second quantity. In union City, about one in every three homes has two cars A. 5 to 2, 5:2, 5/2 B. 1 to 3, 1:3, 1/3 C. 5 to 3, 5:3, 5/5 D. 3 to 2, 3:2, 3/2

**math **

A window in a building is 15.0m above the ground. From this window the angle of elevation to the top of the second building is 32degrees and the angle of depression to the bottom of the second building is 17degrees. What is the height of the second building? -diagram needed ...

**math**

The table shows the number of people that went to see a movie last week. Use these statements to complete the table. On Thursday, 60% of the moviegoers were male. On Friday, 35% of the moviegoers were male. On Saturday, 70% of the moviegoers were female. On Sunday, 45% of the ...

**Dating with Radioactivity**

TruthOverload is 100% right! Just took the test!

**Math**

A company runs food service concessions for sporting events throughout the country. Their marketing research department chose a particular football stadium to test market a new jumbo hot dog. It was found that the demand for the new hot dog is given approximately by p=6?ln(x),...

**Math**

Abby has 45 dogs and ciara has 8000 dogs.Add the dogs 8000 +. 45

**science**

This question can not be answered as you need to know the mass (or weight, since we're on earth) of the stone: PE = mass x height x acceleration KE = mass x velocity^2 / 2

**math**

This equation is known as the slope intercept equation, usually written as y = mx + b, that represents straight lines on a graph. The value of m = 3/5 and represents the slope of the line or the angle at which the line is drawn, while the value of b = 6 means the line crosses ...

**Meth**

Yes

**world history**

1. Which of the following would Locke most Favor? A. Republic B. Oligarchy C. Theocracy D. Absolute monarchy

**Science**

In a chemical compound, would you expect an oxide ion to be joined with one atom of calcium or one atom of potassium? Why?

**Physics**

A hammer of mass m falls from rest off of a roof and drops a height H onto your head. a) Assuming that the tool is in actual contact with your head for a time ?t before it stops and slides off, what is the algebraic expression for the average force it exerts on your skull ...

**Physics**

The engineer of a passenger train moving at 29.0 m/s sees a freight train 360.m ahead on the track moving at 6.00 m/s. The engineer takes 0.400 seconds to react, and then applies the brakes. At what rate must the passenger train then decelerate in order to avoid a collision? ...

**Physics**

I haven't learned momentum yet, is there any way to do it with only Forces and F=ma as well as kinematics? Thanks

**Physics**

A 55kg person pushes on the floor with 800 N of force for 0.25 seconds. How high do they jump off the ground? I know how to find acceleration but I can't find distance.

**Math**

To begin with the amount of lemonade in a jug was 5 times the amount in a cup. Another 15th was then poured into each if the containers.The amount of lemonade in the jug was then 3 times the amount in the cup. How much lemonade was in the jug to begin with?

**English**

oh man i really need this done but if you think i will get better answers than ok.

**English**

but the lesson is over chapters 1-7?

**English**

Yes i'v read up to chapter 7

**English**

--The Watsons go to Birmingham- 1. Which of the following passages from the novel most accurately reflects the political climate of the United States in the early sixties? A. Let's see, where was the 'Coloreds only' bathroom downtown? B. Bright in the spot where ...

**Math**

A boat has a mass of 5680 kg. Its engines generate a drive force of 3380 N due west, while the wind exerts a force of 990 N due east and the water exerts a resistive force of 1310 N due east. Take west to be the positive direction. What...

**HELP ME PLZ MATH**

What are the answers!!!!

**Math**

draw a line with a slope of 1/4 through the point (0 -4)

**Math**

so what is the answer

**Math**

x = e, 5, 7, 10, 12 y = 10, 13, 19, f, 34 a. f = 28; e = 4 b. e = 28; f = 4 c. f = 30; e = 2 d. e = 30; 5 = 2

**math**

Find all values of x such that x^2-5x + 4=0. If you find more than one value, then list your solutions in increasing order, separated by commas.

**Social Studies**

The answer the question is B

**Science**

idk

**calculus**

suppose that c(x)=3x^3 - 12x^2 +9000x is the cost of manufacturing x items. find a production level that will minimize the average cost of making x items

**physics**

A skate boarder traveling at a constant speed of 22 m/s on a road comes to a straight incline with a constant slope (do not use g for incline). While going up the incline, the skater has constant deceleration. If she is 16m up the incline after 12.0 s A) what is the ...

**math**

rate = L/H rate = 100L/H therefore: 100 = 550/H H = 550/100 = 5.5 hours.

**Physics**

You demonstrate hitting a board in a karate class. The speed of your hand as it hits the thick board is 12 m/s with respect to the board, and the mass of your hand is about 0.74 kg. How deep does your hand go into the board before stopping if the collision lasts for 2.0×...

**fraction**

I'm trying to find the common denominator for these numbers 5/7 4/9 2/3

**Morales**

A black rectangular box is 8 inches longer than it is wide. A green rectangle box is 3 inches wider than the black box but it has the same length. The area of the green box is 39 square inches more than the area of the black box.

**Morales**

A black rectangular box is 8 inches longer than it is wide. A green rectangle box is 3 inches wider than the black box but it has the same length. The area of the green box is 39 square inches more than the area of the black box.

**English please help**

are these right?

**Math**

Indira predicts that the actual difference of 19 - 7.82 will be greater than the estimate of 19 - 8 = 11. Indira correct ? Explain how Indira might have arrived at that prediction without subtracting the actual numbers.

**Math**

AA climbing gym charges $10 to climb each day.A pair of climbing shoes costs $84.it costs $169 to buy 6 days of climbing,one pair of climbing shoes,and one harness.how much does a harness cost

**Physics**

A hamster is pushed off a cliff by wind. Its mass is 0.040 kg and has a Potential Energy of 98 J. Find the kinetic energy.

**Math**

Write an equation to model: The temperature of hot water placed in the freezer is 80 'C and it decreases at a rate of 8' C per hour

**Physics: Centre of Mass**

Three masses of 4.0 kg, 5.0 kg and 7.0 kg are located on a line at positions +4.0, +8.0, and -5.0 in meters from the origin, respectively. Where is the center of mass of these three masses? With respect to the origin as x = 0, I calculated the center of mass to be: (4.0 kg)*(4...

**American Government**

BLESSSED

**American Government**

Life saver!!!!^

**Chemistry**

A cold pack manufacturer has decided to change the chemical in their cold pack from ammonium nitrate to ammonium chloride, a safer chemical. The original cold pack formulation used 100.0g of room temperature (27.0C) water and 35 g of ammonium nitrate. Assume that the solution ...

**math**

Which of the following phrases would represent this expression? x/3

**Math**

do ur hw scrub

**math**

In 2007, the population of a town was approximately 35,250. In 2012, the population of the town had decreased to 28,200. Based on a linear model, what will be the approximate population of the town in 2014? Please i need help with this i don't understand.

**maths**

A farmer has 120 metres of fencing. He is going to make a rectangular enclosure PQRS with the fencing. He is also going to divide the enclosure into two equal parts by fencing along MN. SNR The width of the enclosure is x metres. The length of the enclosure is y metres. (a) (i...

**Science**

NaNa was right.

**math**

if the of musician in a fanfare is between 21 and 49. which way does the musician have to stand to form the biggest number of rectangle

**thermodynamics**

what is enthalpy of pure ethly alcohol at 1atm?

**physics**

computer-controlled display screens provide drivers in the Indianapolis 500 with a variety of information about how their cars are performing. for instance, as ac car is going through a turn, a speed of 221 mi/h (98.8m/s) and centripetal acceleration of 3.00g are display. ...

**statistics**

Suppose the average weight for population of men is 178 pounds. You draw a random sample of 10 men and record the following weights: 150, 145, 180, 200, 175, 190, 142, 175, 240, 150. Calculate the sampling error.

**Math**

In this 2x3 grid, each lattice point is one unit away from its nearest neighbors. A total of 14 isosceles triangles(but not right triangles), each with an area of ½u squared have only two vertices that are one unit apart in the grid. how many such half-unit triangles ...

**PHYSICS: PLEASE HELP A.S.A.P HMK DUE AT MIDNIGHT T**

no way

**Maths**

When the plane is directly above the runway, it is at an altitude of 652.7m

**Math**

my divisor is 10. greatnessthan4 times 5 . I am greater than 4 times 5 my remainder is 1 . what dividend am I.

**Chemistry**

the answer to 3# is D

**PLEASE HELP HISTORY**

These answers are 100% RIGHT^^