# Posts by Andrew

Total # Posts: 1,174

**math**

The scale on amount is 2 inches equals 75 feet. On the map a rectangle or park is 8 inches long and 3 inches wide. What is the actual area of the park? Please answer I am confused.

**Math**

Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels at 85 miles per hour. The westbound train travels at 95 miles per hour. How long will it take for the two trains to be 252 miles apart?

**physics**

A 500 g mass of Copper at 24°C is placed in contact with another 750g of copper at 84°C. If it is isolated from it surroundings, what will be the final equilibrium temperature of the blocks.

**Mathematics **

Juice is sold in a rectangular prism measuring 11 cm by 6 cm by 4 cm. A cube is built to hold the same volume. By how much does the surface area decrease? Give answer to 1 decimal place.

**Physical Science**

At a crime scene, the forensic investigator notes that the 7.0-g lead bullet that was stopped in a doorframe apparently melted completely on impact. Assuming the bullet was fired at room temperature (20°C), what does the investigator calculate as the minimum muzzle ...

**Math**

Method C? It's seems to be less biased since it's randomly chosen

**Math**

Predicted winner in an election for town mayor . Method C: Telephone 100 randomly-chosen voters who live in the town. 54 percent plan to vote for the incumbent mayor. Method D: Telephone 70 people who have lived in the town for more than 25 years. 45 percent plan to vote for ...

**Math**

Perimeter (p) = 200cm 2(L+B)=200 Length (L)= (16+x)cm Solution substitute 2(16+x)=200 32+2x=200 2x=200-32 2x=168 divide both sides by 2 2x=168 2x/2=168/2 x= 81 Remember, Length(L)= 16+x 16+81 Length=97cm 2(L+B)=200 2(97+B)=200 divide both sides by 2 2(97+B)/2=200/2 (97+B)= 100...

**6th grade math (student)**

Yes. I didn't know I was to assume that she answered all 20 questions correctly. Thank you!

**6th grade math**

On a math quiz, Mary scored 3 points for each of the 12 multiple choice questions she answered correctly, and 5 points for each of the 8 free response questions she answered correctly. What was the total number of points Mary scored?

**it**

Of course.

**Mathematics**

There are 4 sides to a square. So, ideally the equation would be written as 20/4 = ? Seeing as how 20 is the entire length of the square. 20/4 = 5

**Math**

Ever tried wolfram alpha? The answer to your equation here though I've figured is 480. 48 possible arrangements of women to their roles and 10 to the men, in such a situation. to find the possible arrangement for the two combined we must then multiply as each combination ...

**math**

There are 3 red balls and 7 blue balls in Bowl A, and 8 red balls and 2 blue balls in Bowl B. Mandy rolls a die and if a prime number is up, Bowl A is selected; otherwise Bowl B is selected. Then Katie draws a ball randomly from the selected bowl. Find the probability of Bowl ...

**Physics**

A 1140 kg car traveling south at 24 m/s with respect to the ground collides with and attaches to a 2550 kg delivery truck traveling east at 16 m/s.

**Probability, Stats**

For every 1000 batteries produced by a manufacturer 15 are defective. What is the probability that 100 randomly chosen batteries will have exactly 2 defective batteries?

**Precalculus**

its pi/2

**Chemistry**

I did again, using (molecular weight 16.0) and (atomic weight 40.0), instead of the molar masses to convert from g to mol and I used a 50g imaginary sample. It is pretty close to 500. torr, maybe just a rounding error?

**Chemistry**

A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressure of argon is 200. torr, what is the pressure of methane, in torr? I am coming out with 443torr, but the listed options are 80.0 torr b. 200. torr c...

**Chemistry**

A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressure of argon is 200. torr, what is the pressure of methane, in torr?

**Math**

There are 132 people seated in the school auditorium for an assembly. There are 6 rows in the auditorium, each with the same number of seats. If the auditorium is completely filled, how many seats are there in each row?

**math**

use a arrow notation to write a rule for this translation (2,1) (5,3) (-1,4) ?

**language arts**

1. which of the following sentence contains a linking verb ? A. Teresa wore her fav shoes today. b. her shoes look really comfortable c. she put them on with striped socks d. Teresa walked for hours without a complaint ! I'm not sure whts the answer , I think its A or b , ...

**math**

2. is D n 4. is b , wht is 3 n 1?

**math**

1. determine which order pair is a solution of y = -5x + 10 A. (-15,5) **** B. (2,0) C. ( -1 , -5 ) D. (3, 25 ) 2.on which of the following lines does the point ( 7,1 ) lie? A. y-5x = 4 B. y=x -10 C. y = -4x +3 *** D. y + -x +8 3.find the slope of the line through ( -9 , -10...

**math**

Four friends contribute sums of money to a charitable organization in the ratio of 2:4:5:7. if the largest amount contributed is $1.40, calculate the total amount contributed used by the four people?

**Chemistry**

Before small batteries were available, carbide lamps were used for bicycle lights. Acetylene gas, C2H2, and solid calcium hydroxide were formed by the reaction of calcium carbide, CaC2, with water. The ignition of the acetylene gas provided the light. Currently, the same lamps...

**Chemistry**

A sample of carbon monoxide was collected over water at a total pressure of 752 torr and a temperature of 15°C. What is the pressure (in torr) of the carbon monoxide?

**math-mechanics 1**

i solved a)u=2i and b)r=2t+1/2[-0.4(i) 0,2(j)] at c) i don t have idea how to solve At time t = 0, a small boat is at a buoy travelling due east with speed 2 ms?1 . The boat experiences a constant acceleration of (– 0.4i + 0.1j) ms?2 . The unit vectors i and j are ...

**math**

A girl swims across a river. When she swims in still water, she swims at 1.25 m/s, the river flows parallel to its banks at v m/s. The girl aims to swim upstream at angle ? degrees parallel to the river bank so that her resultant velocity of 1 m/s is along AB, perpendicular to...

**Chemistry**

How many milliliters of water at 25.0°C with a density of 0.997 g/mL must be mixed with 165 mL of coffee at 91.0°C so that the resulting combination will have a temperature of 62.1°C? Assume that coffee and water have the same density and the same specific heat (4....

**Chemistry**

Calcium oxide, or lime, is produced by the thermal decomposition of limestone in the reaction CaCO3(s) arrow CaO(s) + CO2(g). What mass of lime can be produced from 2001.2 kg of limestone?

**Chemistry**

For the reaction HCl + NaOH → NaCl + H2O, how many moles of hydrochloric acid are required to produce 281.0 g of water?

**math**

At a sports festival half the number of people that chose basketball, chose football. The number of students who chose basketball was a quarter the number of students who chose baseball. There were 84 more students who chose baseball than soccer. How many chose basketball?

**Math**

Two 2 1/2 inch plastic strips and two 5 1/3 inch plastic strips are used to form a rectangle. What is the Perimeter of the rectangle?

**Physics**

A 1.55 m tall person lifts a 1.80 kg book off the ground so it is 1.95 m above the ground. A.) What is the potential energy of the book relative to the ground? B.) What is the potential energy of the book relative to the top of the person's head?

**Chemistry**

In order to determine the concentration of a solution of Carbonic Acid (H2CO3), a sample was placed in a buret and titrated with 0.1132 M Sodium hydroxide. For the carbonic acid, the initial reading was 11.0ml and final reading was 31.0 ml. For sodium Hydroxide, the initial ...

**Maths**

The sum of 26 and a number equals 3 times the number Have to define a variable ,then write equation

**Math**

70*20*20

**math**

Kyle and Andrew decide to make some money by raking leaves in their neighborhood. The houses in their neighborhood each have half acre lawns. Kyle and Andrew each start by raking the leaves from their own yards. Kyle realizes it takes him 3 hours to rake one yard and Andrew ...

**Physics (Mechanics)**

A bat makes contact with a ball 0.8 meters above the ground. The ball then travels with a speed of 22 m/s, moving up. How high does it go?

**Math**

432

**Psychology**

China and Singapore are examples of what type of economies?

**Math**

Given 800 matches, what is the largest figure in the series(ie what value of n) that you could construct and how many matches would you have left over at the end?

**Algebra**

Hey! I need some help with this question! I totally forget how to do these types of problems! 1 over 2.75 = 1 over 3.2 - 1 over x ( 1/2.75 = 1/3.2 - 1/x) / = fraction bar

**control structures**

A store uses the following policy to award discount. If the customer purchases products costing more than ksh 30,000 she is given a discount of 10%, otherwise she is given a discount of 2%. Write a complete C++ program that allows a user to input the total value of purchases ...

**COM 425**

Organizational innovation is a planned and direction change intended to 1) get an advantage over the organization's competition 2) improve the organization's upper hierarchy 3) address problems and improve organizational performance 4) dismantle organizational rules ...

**Math**

Which letter on the number line above represents 6?

**Math**

Then there would 9 and 2/5 pieces left.

**Computer science**

How is creating a virtual ecosystem similar from the real world?

**Msth**

The first 10 miles of a taxi ride for free each additional mile cost $0.45 John takes a taxi ride across town and it's a driver $4 write an expression to represent the cost of M miles

**Math**

The number of blocks has nine in the ones place the numbers in the hundreds place is one more than the number in the tens place there are two numbers equal 11 how many block are there

**Algebra**

A farmer has 20 acres to plant in wheat and barley. He has to plant at least 15 acres. Wheat costs $200 per acre to plant and barley costs $150 per acre, and the farmer has only $2400 to spend. If the estimated profit of an acre of wheat is $450 and the estimated profit of an ...

**Algebra**

Bakery has bought 250 pounds of muffin dough. They want to make waffles or muffins in half-dozen packs out of it. Half a dozen of muffins requires 1 lb of dough and a pack of waffles uses 3/4 lb of dough. It take bakers 6 minutes to make a half-dozen of waffles and 3 minutes ...

**Algebra**

The first group was responsible for making 160 suits while the second group was responsible for making 25% fewer suits in the same amount of time. The first team made 10 more suits each day than the second team and finished its job 2 days before the deadline date. How many ...

**Algebra**

A tourist traveled on a motorboat against the current for 25 km. And then returned back on a raft. In the boat the tourist traveled for 10 hours less than on the raft. Find the speed of the current if the speed of the motorboat in still water is 12 km/hour.

**Algebra**

A ship traveled 150 km with the current, and then turned around and traveled back, spending 5h and 30 min on its trip. Find the speed of the current if the speed of the ship in still water is 55 km/hour.

**Algebra**

A train covered the distance of 400 km between A and B at a certain speed. On the way back it covered 2/5 of the distance at that same speed and then it decreased its speed by 20 km/hour. Find the speed of the train at the end of its journey from B back to A, if the entire ...

**Algebra**

An automobile covered the distance of 240 km between A and B with a certain speed. On its way back, the automobile covered half of the distance at the same speed and for the rest of the trip he increased his speed by 10 km/hour. As a result, the drive back took him 2/ 5 of an ...

**politcal science**

Ralph Nader

**Math**

The units digit of a two-digit positive integer is 4. If the tens digit and units digit of the number are switched, the new number is 45 less than the original number. What is the sum of the original and the new number?

**Algebra 2**

Log base 5 of 16 cubed. Times log base 11 of 6 squared. Equals logx.

**Geography and Society**

Actually, it's "areas near the poles". I just took the quiz. Also, you know this, because near the poles, it's colder, so all the moisture in the air freezes, making very, very, very dry.

**Algebra**

identify the initial amount a and the growth factor b in the exponential function g(x)=14*2^x a=14, b=x a=14, b=2 a=28, b=1 a=28, b=x

**L.O**

Nobody can answer this question but you. What do you think it is?

**SCIENCE**

what is the question you are asking?

**English**

Thanks Ms. Sue! You are a great help!

**English**

hi I need help with this. It is a section from the story 'The Sniper' and it is a PEE (Point, Evidence, Explanation) question... PLEASE HELP ME. Here is the question: "The writer says that the sniper's eyes had 'the cold gleam of the fanatic' what does...

**English**

What i do is i look for historical events for example example World War 2 and i write about that

**Math**

How do you find the point of intersection(s) for x = 2y2 + 3y + 1 and 2x + 3y2 = 0 A) You cannot find points of intersections for non-functions. B) Plug in 0 for x into both equations and solve for y. Then plug that answer back into the other equation to find the corresponding...

**Algebra**

substitute 12=-4(5)+3 -20+3 12=-17 is not true

**physics**

session.masteringphysics. com/problemAsset/1187768/5/P4-80.jpg

**physics**

A 71.0 kg patient is suspended in a raised hospital bed as shown in the figure. The wire is attached to a brace on the patient's neck and pulls parallel to the bed, and the coefficients of kinetic and static friction between the patient and the bed are 0.500 and 0.800, ...

**Science**

If an astronaut with a tool belt accidentally pushed off from the shuttle, how could the tools in the belt be used to return the astronaut to the shuttle?

**Math**

What's another way you can write 0.023 (fraction or percent) problem: write 0.023 two different ways

**english 1**

Which sentence from the passage best supports the conclusion that the author was influenced by Amaterasu?

**Math**

Find two consecutive odd integers such that the square of the larger is one less than twice the square of the smaller.

**Physics**

A force F = 119 N acts at an angle α = 31◦ with respect to the horizontal on a block of mass m = 22.5 kg, which is at rest on a horizontal plane. The acceleration of gravity is 9.81 m/s 2 . If the static frictional coefficient is µs = 0.72, what is the force ...

**math**

7x-3y=41 2x=-5y Solve using augmented matrix What do i do?

**Math**

$10,000 invested. part at 3% and part at 6% for a period of 1 year. how much was invested in each account if the interest earned in the 6% account was $357 greater than the 3% account?

**Math**

Sorry I remembered it wrong. Here it is again. A candy machine contains 5 times the number of nickels in dimes and 16 less than the number of nickels in quarters. How many of each are there?

**Math**

A candy machine contains 5 times the number of nickels in dimes and is less than 16 the number of quarters. Total value is $12.80. How many are there nickels and dimes? I can't understand what means 5 times the number of nickels in dimes. How do you put nickels in dimes? ...

**Math**

90 members of a sport club plays at least one of the game tennis,football and volleyball,10 plays tennis and football,19 play football and volleyball and 29 plays tennis and volleyball.x people plays all the 3 games,while x people each play only one game how many play football...

**Math**

A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from the river, choose his ...

**College of Medicine ;University of Malawi**

what is the ph at 25 degrees Celsius of a solution made by dissolving a 5.00 grain tablet of aspirin in 0.500 litres of water? The tablet contains 0.325g of the acid HC9H7O4. ka=3.3*10^-4mm=180.2g/l

**Physics**

Szymon and Chris fly their balloon around the earth in 80 days. Taking the radius of the earth to be 6400 km, calculate their average speed in m/s. I did answered all the homework questions but I didn't know how to do this one?

**Kids kingdom school**

Perimeter= adding all outside sides. A carpet is square one is 15cm and the other is 12cm and because its square the other side will be the same since it's parallel 15+15+12+12= 30 + 24 = 54

**Pre-Algebra**

Jsjdhhhwhdhjwsuhfhe

**Programming**

Write a program that inputs (from the user) the number of hours worked and hourly rate for employees and outputs the total pay. The program should process an arbitrary number of employees; the user will terminate input by entering 0 hours worked and pay rate. Use a class ...

**Chemistry**

Calculating theoretical yield and percentage yield from preparation of 4-acetoxybenzoic acid from the interaction of 4-hydroxybenzoic acid and sulphuric acid

**Chemistry**

1. Explain in terms of rate laws and/or reaction quotients why the product’s low solubility favors the forward reaction over the reverse. The forward rate law is rate = k[maleic acid]n and the reverse rate law is: rate = k[fumaric acid]n. Consider how the rate laws are ...

**Chemistry**

What would happen to the peaks on your chromatogram for substances that do not separate?

**chemistry**

What would happen to the peaks on your chromatogram for substances that do not separate? How are transmittance values are affected by the amount of sample on your salt plate?

**Math**

How could you use the product of 108 and 4 to find the product of 324 and 4

**Pre-calculus**

Steve your calculations/formulas are wrong they do not work for continuous compounding sorry

**physics**

When landing after a spectacular somersault, a 40.0 kg gymnast decelerates by pushing straight down on the mat. Calculate the force she must exert if her deceleration is 5.00 times the acceleration of gravity.

**math**

can you solve expressions that have the same variables, but are in a different order? For example: 36jkm - 36mjk

**chemistry**

Recrystallization Lab What are the potential consequences of using a spatula to scrape crystals from wet filter paper during filtration?

**Math**

my son was asked to find each product by factoring the tens, and to draw rectangles if needed to on 6x2, 6x20, and 6x200. I'm not sure how to do this. please help me

**Physics-Trajectory**

Plug it in