# Posts by Bob

Total # Posts: 3,224

**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 ...

*March 19, 2017*

**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

*March 19, 2017*

**Math**

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

*March 5, 2017*

**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 ...

*March 1, 2017*

**Calculus**

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

*March 1, 2017*

**math**

Steve is correct

*February 25, 2017*

**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 ...

*February 23, 2017*

**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 ...

*February 14, 2017*

**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

*February 9, 2017*

**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

*February 7, 2017*

**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 ...

*February 4, 2017*

**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 ...

*January 26, 2017*

**Dating with Radioactivity**

TruthOverload is 100% right! Just took the test!

*January 25, 2017*

**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),...

*January 24, 2017*

**Math**

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

*January 24, 2017*

**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

*January 20, 2017*

**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 ...

*January 20, 2017*

**Meth**

Yes

*January 15, 2017*

**world history**

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

*January 13, 2017*

**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?

*January 12, 2017*

**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 ...

*January 9, 2017*

**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? ...

*January 7, 2017*

**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

*January 7, 2017*

**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.

*January 7, 2017*

**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?

*January 7, 2017*

**English**

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

*January 6, 2017*

**English**

but the lesson is over chapters 1-7?

*January 6, 2017*

**English**

Yes i'v read up to chapter 7

*January 6, 2017*

**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 ...

*January 6, 2017*

**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...

*January 4, 2017*

**HELP ME PLZ MATH**

What are the answers!!!!

*December 19, 2016*

**Math**

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

*December 19, 2016*

**Math**

what is the answer

*December 9, 2016*

**Math**

so what is the answer

*December 9, 2016*

**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

*December 9, 2016*

**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.

*December 1, 2016*

**Social Studies**

The answer the question is B

*November 29, 2016*

**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

*November 21, 2016*

**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 ...

*November 20, 2016*

**math**

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

*November 20, 2016*

**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×...

*November 19, 2016*

**fraction**

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

*November 18, 2016*

**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.

*November 17, 2016*

**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.

*November 16, 2016*

**English please help**

are these right?

*November 15, 2016*

**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.

*November 15, 2016*

**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

*November 14, 2016*

**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.

*November 11, 2016*

**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

*November 9, 2016*

**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...

*November 8, 2016*

**American Government**

BLESSSED

*November 8, 2016*

**American Government**

Life saver!!!!^

*November 7, 2016*

**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 ...

*November 3, 2016*

**math**

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

*November 2, 2016*

**Math**

do ur hw scrub

*November 2, 2016*

**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.

*November 1, 2016*

**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...

*November 1, 2016*

**Science**

NaNa was right.

*October 31, 2016*

**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

*October 30, 2016*

**thermodynamics**

what is enthalpy of pure ethly alcohol at 1atm?

*October 29, 2016*

**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. ...

*October 27, 2016*

**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.

*October 27, 2016*

**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 ...

*October 25, 2016*

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

no way

*October 21, 2016*

**Maths**

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

*October 13, 2016*

**Math**

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

*October 11, 2016*

**Chemistry**

the answer to 3# is D

*October 10, 2016*

**PLEASE HELP HISTORY**

These answers are 100% RIGHT^^

*October 5, 2016*

**physical science**

a car travels 50km east in 30 mins. what is the velocity in km/h

*October 2, 2016*

**math**

Paige spent a total of $60 on clothing items. She bought 2 pairs of shorts for $10 each. She bought some T-shirts for $4 each. She also bought some sandals for $12 each. How many of each clothing item did she purchase?

*September 29, 2016*

**american Government**

BLESSED US^^^

*September 25, 2016*

**american government**

Correct answers ^^

*September 24, 2016*

**check my work**

BDA y'all we blessed

*September 23, 2016*

**math**

1. Which of the following numbers is a rational? A. 4/5 B. square root of 27 C. 4.02002000200002... D. Square root of 31 2. Which type of number is shown below? 0.313311333111... A. repeating decimal B. rational C. irrational D. terminating decimal 3. Select all the rational ...

*September 21, 2016*

**World History**

NVM! B D IS CORRECT OPS XD

*September 14, 2016*

**World History**

6. Is c, d not b, d

*September 14, 2016*

**Government**

^^^OCA was totally correct^^^^ Thanks so much

*September 12, 2016*

**physics**

A particle is traveling counterclockwise in a circle of radius r = 2.30 m. At some instant in time, the particle is located by the angular coordinate α = 24.0°, the total acceleration has a magnitude of a = 15.0 m/s2 and is directed at an angle β = 20.0° with...

*September 10, 2016*

**stuff**

is hair biotic or abiotic

*September 9, 2016*

**english**

"I hear American siniging the varied carols I hear" Is this a) onomatopea b) anaphora c)Aliteration d)Antithesis E) Personification I think it is personification because Americaa is not a person therefore it can't sing?

*September 9, 2016*

**math**

Water contained by a dam exits a spill-way 685ft above the base of the dam. Determine the velocity of the water as it strikes the base of the dam if its initial velocity as it leaves the spillway is negligible.

*September 8, 2016*

**history**

1. A & C 2. A & C 3. B

*September 8, 2016*

**Algebra II**

What is the standard deviation of the data set? Round the answer to the nearest tenth. 5, 9, 11, 4, 8, 9, 12

*September 7, 2016*

**biology**

explain the following statement: "life is complex on the molecular level"

*August 31, 2016*

**math**

The coach of a baseball team separates the players into groups for drills. Each group has the same number of players. Is the total number of players on baseball team prime or composite? Explain.

*August 30, 2016*

**History**

What can we learn from reading ancient greek dramas?

*August 24, 2016*

**Math**

Find the real part of (sqrt{3} - i)^{2011}.

*August 24, 2016*

**Math**

Find the imaginary part of (cos12 degrees +i*sin12 degrees +cos48 degrees +isin48 degrees)^6.

*August 23, 2016*

**American government**

its ADDC

*August 23, 2016*

**American Government**

No Number 1 is B

*August 21, 2016*

**Lead Skls Dev**

Haileab Asgedom lived a wild young adulthood primarily due to the lack of parental figures in his life. What did he say was his greatest regret about this period in his life?

*August 18, 2016*

**Social studies (Ms.Sue are these correct?)**

13.is c and 16. is a

*August 17, 2016*

**Math**

It is saying it is wrong where have i messed this up?

*July 30, 2016*

**Math**

I think it is 9. Am I right?

*July 30, 2016*

**Math**

A lattice point is a point with integer coordinates. How many lattice points (x,y) with -100 less than or equal to x less than or equal to 100 and -100 less than or equal to y less than or equal to 100 are on the graph of the parametric equations x=30-40 cos t y=-50 + 30 cos t...

*July 30, 2016*

**Math**

Let G be the graph of the parametric equations x = cos(4t), y = sin(6t). What is the length of the smallest interval P such that the graph of these equations for all t E P produces the entire graph G?

*July 30, 2016*

**Math**

Yeah sorry I don't know why it keeps happening.

*July 30, 2016*

**Math**

1. The graph of the parametric equations x= 2-3t, t= -1+5t is a line. What is the slope of this line? Please help!!!!!

*July 30, 2016*

**Math**

Sorry it was a typo it was the first one thanks a lot!!!

*July 29, 2016*