# Posts by teddy

Total # Posts: 61

**Math**

A father who is 42 years old has a son and a daughter. The daughter is three times as old as the son. In 10 years, the sum of all their ages will be 100 years. How old are the two siblings at present?

**Science**

1. What is the main difference between mechanical and electromagnetic waves? A. Mechanical waves involve transfer of energy, electromagnetic waves do not. B. Mechanical waves require a medium to travel in, electromagnetic waves do not.~~~~ C. Mechanical waves have amplitude ...

**Math**

Your crew can pave two driveways in a day. You work five days per week but take off 2 weeks each year for holidays and vacations.

**finance**

a company has an outstanding issue of 1,000 face value bonds with a 9.5% annual coupon and 20 years remaining until maturity. The bonds are currently selling at a price of 90 (90% of face value).

**Social Studies, are they all right?**

Oh, I'm sorry about the first comment. I wasn't intending to be mean. I was intending to be just ashamed.

**Social Studies, are they all right?**

Thank you, though, very much. I really appreciate you looking at it. I was like, "I hope all of these answers are correct.", so, you're a lifesaver! :)

**Social Studies, are they all right?**

OO_ Excuse me...

**Social Studies, are they all right?**

1. In a typical rural village in Mexico, you might expect to find that most people living on farms get their food by a. growing their own. b. buying what they need at large supermarkets. c. buying what they need at small supermarkets. d. gathering nuts and wild berries. 2. ...

**calculus**

A person can row at a constant speed of 6 miles per hour. If the rower wants to row directly across a river with a current of 2 mph, at what angle should they row? How fast does the boat actually cross the river?

**chemistry**

why should you use a minimum amount of water to rinse the conical vial while transferring the purified acetaminophen to the Hirsch funnel?

**Math**

The formula r=2sqrt(...)5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will Acari skid at 20 mph?

**physics**

Stones are thrown horizontally, with the same initial velocity, from the tops of two different buildings, A and B. The stone from building A lands 4 times as far from the base of the building as does the stone from building B. What is the ratio of building A's height to ...

**physics**

Stones are thrown horizontally, with the same initial velocity, from the tops of two different buildings, A and B. The stone from building A lands 4 times as far from the base of the building as does the stone from building B. What is the ratio of building A's height to ...

**physics**

A projectile is launched from ground level at 37.0 m/s at an angle of 30.6 ° above horizontal. Use the launch point as the origin of your coordinate system. a)How much time elapses before the projectile is at a point 8.9 m above the ground and heading downwards toward the ...

**physics**

A)A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 8.15 m/s at an angle of 19.0o below the horizontal. It strikes the ground 2.50 s later. How far horizontally from the base of the building does the ball strike the ground? B)...

**math**

is it independent or dependent: The contract states that every day past the agreed upon completion date the project is not finished, the price is reduced by $25. Also state the rate of change?

**chemistry**

Exactly 10 mL of water at 25°C was added to a hot iron skillet. All of the water was converted into steam at 100°C. If the mass of the pan was 1.20 kg and the molar heat capacity of iron is 25.19 J/mol∙°C, what was the temperature change of the skillet?

**chemistry**

Exactly 10 mL of water at 25°C was added to a hot iron skillet. All of the water was converted into steam at 100°C. If the mass of the pan was 1.20 kg and the molar heat capacity of iron is 25.19 J/mol∙°C, what was the temperature change of the skillet?

**chemistry**

Exactly 10 mL of water at 25°C was added to a hot iron skillet. All of the water was converted into steam at 100°C. If the mass of the pan was 1.20 kg and the molar heat capacity of iron is 25.19 J/mol∙°C, what was the temperature change of the skillet?

**science**

A car is traveling down the road at 25 m/s,and then increases their speed to 45 m/s in 5 seconds. What is this car's acceleration?

**college math**

simplify -10 -5

**math**

If a conservationist catches 72 trout, tags them and throws them back in the lake. Later 33 trout are caught, 11 of them are tagged. How many trout would the conservationist expect to find in the lake.

**math**

A student traveled 236 km in 18 days. At the same ratio how far would the student travel in 54 days.

**physics**

E= 131 N/C ? = 12.6 ? up from the negative x axis

**physics**

E= 131 N/C

**Cell Biology**

How many molecules of ATP will be synthesized by the complete oxidation of one molecule of fructose 1, 6-bisphosphate to carbon dioxide and water by a liver cell? Show your work.

**MATH**

A semiograph 300km from the epicenter of an earthquake recorded a maxximum amplitude of 5.3x10^2 um. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth)

**Spanish**

Preterite vs. Imperfect I'm just trying to clarify the differences. For example: 1. The food was delicious-imperfect? 2. The house was very big-imperfect? 3. The bump on his head was a tumor-imperfect? Are these right? or should they be preterite?

**Math**

I think so too. The independent variable is the number of papers and dependent is how long it takes them to deliver.

**Math 132 Trigonometry (College)**

exact value of csc 450 degrees

**Statistics**

I don't know, I need help too

**binghamton**

I wanna find some one to taking my class. I will pay it.

**English**

Is this a complete sentence? Or should the comma be replaced by a semi-colon? Surely there are certain situations in which appropriate attire is necessary, so should we as women give in to that standard?

**English**

What punctuation is correct for this sentence? Comma or Semi-Colon? But these weren’t simply mashed; they were formed delicately by my mother’s hands But these weren’t simply mashed, they were formed delicately by my mother’s hands

**English**

Is this sentence below correct grammatically ? Thanks! Throughout the story a couple of crucial events take place, but we shouldn’t merely focus on these occurrences themselves, but rather on Edie’s assessment of them.

**Geometry**

The coordinates of the vertices of quadrilateral ABCD are A (-8, 8), B (-4, 8), C (-4, 4), D (-8, 4). The coordinates of the vertices of quadrilateral PQRS are P (-10, 10), Q (-2, 10), R (-2, 2), S (-10, 2). Which statement is correct? Answer A. Quadrilateral ABCD is similar ...

**accounting**

1.9

**Geometry**

Which set of ordered pairs has point symmetry with respect to the origin (0, 0)? (5, 4), (-5, 4) (5, 4), (-5, -4) (5, 4), (5, -4) (5, 4), (4, 5)

**Geometry**

Which set of ordered pairs has point symmetry with respect to the origin (0, 0)? (5, 4), (-5, 4) (5, 4), (-5, -4) (5, 4), (5, -4) (5, 4), (4, 5)

**Physics**

In a tug of ear each side pulls with a force of 500 newtons, but the rope does not move. how much work is done on the rope?

**Biology**

In regard to the kidney, Why is everything dumped into the tubule? Why not dump only wastes and toxins like insects?

**Biology**

Is urine normally found in bladder of fetal pig? Why or why not?

**Biology**

When dissecting a fetal pig, how can you tell the difference between veins and arteries? I remember someone saying something about if you poke one, its spongier or something? help! Thank you!

**Biology**

Which root system is most effect anchor? And which is the most effective for storage of nutrients, why? I thought that the best anchor would be the taproot but I don't know how to figure out which is best for storing nutirents?

**Biology**

Name all the structures that bile passes through (in order) from its creation to where it actually functions.

**chemistry**

Calculate the volume of 0.05 kg of bromine. (D=3.12 g/ml)

**math**

what is the distance between a (0,0,0) b (2,7,-1)

**Statistics**

In a certain city, there are 10,000 persons age 18 to 24. A simple random sample of 500 such persons is drawn, of whom 200 turn out to be currently enrolled in college. Find a 90% con¯dence interval for the percentage of persons age 18 to 24 in the city who are attending ...

**math**

if there are 3 numbers on a combination lock. how many combinations can there be?

**Chemistry**

which isomer Maleic acid or fumanic acid has the strongest intermolecular bonding? why?

**algebra 2 logs and trig**

It's csc 2x, and I got it down to this before but I don't know if I can use your hint from there or if I should start from square one: log(base 2)csc(x) = log(base 4)csc(4x^2) Would that become the following? log(base 2)csc(x) = 2log(base2)csc(4x^2)

**algebra 2 logs and trig**

log(base 2)cotx - 2log(base 4)csc2x = log(base 2)cosx the answer should be x = pi/3, 5pi/3 not sure how to work it out though, any help? I tried canceling the bases but that led to a dead end.

**algebra 2**

Well the original problem was the following but I worked it out to what I put here before: log(base 2)cotx - 2log(base 4)csc2x = log(base 2)cosx I switched the cosx and the csc2x and used properties of logs to get log(base 2)cscx, but maybe I'm wrong in doing that. is ...

**algebra 2**

log(base 2)csc(x) = log(base 4)csc(4x^2) I tried doing the log(base a)b = logb/loga but I can't get past that because I'm not sure what to do after that. How do I set it up so I get like cscx=? or something so I'm able to solve for multiple values of x? the answer ...

**trigonometry**

I just solved for each log individually on my calculator and used decimals to find the answer, and it ended up being right thanks!

**trigonometry**

(3^m)(5^(m+1))=12^(2m-1) not sure how to solve this but I think you use natural logs? I'm just stuck because the first two are multiplying and not adding and we didn't go over this

**Physics**

An old Chrysler with mass 1800 kg is moving along a straight stretch of road at 58 km/h. It is followed by a Ford with mass 1400 kg moving at 70 km/h. How fast is the center of mass of the two cars moving?

**business**

explain the operational components of planning, sourcing, making, and delivering applied in supply chain management

**Chemical Kinetics**

The kinetics of the catalytic decomposition of NH3 into N2 and H2 on a hot tungsten filament at 1100 °C was investigated by Kunsman. He measured the times (t1/2) required for half of NH3 to decompose at different initial NH3 pressures, as shown below: P (torr) t1/2 (...

**macroeconomics**

Describe the four factors of production: land, labor, capital, and entrepreneurship. Pick a product with which you are familiar, and explain how these four factors of production were used to transform raw materials into the finished good that you enjoyed. What role did the ...

**science**

I see others have asked the same question but I do not understand the answers given. Question is to do with zinc solid and dilute sulphuric acid. What substance is left? I see by other posts that Bob Pursley answered this question. I haven't seen his answer but here is a ...

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