# Posts by David

Total # Posts: 2,287

**History**

Does anyone know what impact has gothic architecture had on modern architecture?

**Physics**

In a glancing collision between two identical steel spheres, which of the following statements are correct? (Assume this collision is perfectly elastic. Select all that apply.) a) The velocities of the spheres after the collision in the direction perpendicular to the incoming ...

**Physics**

A steel ball rolls off a flat table of height 1.05 m with a velocity of 1.90 m/s a) How long will it take the ball after leaving contact with the table to hit the ground? b) How far from the edge of the table will the ball hit the floor?

**History**

Need help with study guide!! 1. What are two inventions/concepts that Eli Whitney is known for? 2. Why did New England become the center of the American Industrial Revolution? 3. What was a key element in developing a market economy in nineteenth century America? 4. What was ...

**Math**

Building A is 190 feet shorter than Building B. The total height of the two buildings is 1520 feet. Find the height of each building.

**Math**

well you will have 20 dimes and 16 quarters.

**Math**

Consider the equation f(x)= -2 sqrt(X+3). List in order the transformations applied to the parent function.

**MATH HELP PLEASE**

Find the restricted values of x for the following rational expression. x^2 + x + 6/8x^2 − 8x

**Algebra**

y=2-x

**Math**

Find the restricted values of x for the following rational expression. x^2 + x + 6/8x^2 − 8x

**Physics**

In a repair shop a truck engine that has mass 429 kg is held in place by four light cables (Figure 1) . Cable A is horizontal, cables B and D are vertical, and cable C makes an angle of 37.1∘ with a vertical wall. Tension in cable A is 729 N . a.What is the tension in ...

**school for wildlife conservation**

what is the meaning of global warming

**Physics**

A road heading due east passes over a small hill. You drive a car of mass m at constant speed v over the top of the hill, where the shape of the roadway is well approximated as an arc of a circle with radius R. Sensors have been placed on the road surface there to measure the ...

**Math**

Four thousand students at a school were asked to name their favorite pizza topping. The results were 800 Pepperoni, 1,000 Sausage, 1,200 Mushrooms, 560 Peppers, 240 Onions, and 200 Other. Your friend expresses these results in this circle graph. Your friend made a mistake, ...

**intermediat Algebra**

Rachel runs 7 miles in 80 minutes. At the same rate, how many miles would she run in 64 minutes?

**math(elmntry euclidean geometry)**

The sum of the angles of a quadrilateral is 360°. Find the conditional, draw a diagram, and state the given and conclusion. CONDITIONAL FORM: If it is the sum of the angles of a quadrilateral, then it measures 360°. DIAGRAM: Not shown, but pictures a trapezoid with ...

**ALgebra**

what is the maximum speed a car could be traveling in order to stop within 40ft? d=0.05V^2+1.20V

**Science**

Scientific methodology is what distinguishes science from other disciplines. Explain

**statistics**

a golf ball is selected at random from a golf bag. If the golf bag contains 4 brown balls, 9 yellow balls, and 12 orange balls, find the probability of the following event. probability the ball is brown or yellow?

**Math**

simplify the expression (4 square root of x)/(6-square root of x) I need help with this. I've worked it out to the point where i got (2 square root of x)/(3-square root of x), but I'm pretty sure that it can be simplified further. If what I'm thinking is right you ...

**Math**

simplify the expression (4 square root of x)/(6-square root of x) I need help with this. I've worked it out to the point where i got (2 square root of x)/(3-square root of x), but I'm pretty sure that it can be simplified further. If what I'm thinking is right you ...

**Chem**

a gas has a volumn of 36.0 L and a pressure of 750 torr when the temperature is 10 degrees celsius. what is the pressure if the volume changes to 78 degrees celsius if the amount of gas stays the same?

**sensitive probability plz help**

Lol what a joke of a teacher

**Physic**

A bullet of mass 0.05kg has a speed of 400cm|s. What is its kinectic energy? It hits a wall of which the average resistive force is 1000N, Cal.the distance penestrated by the bullet

**Maths**

Five-eights of the population of a village are men, one-sixth are children and the rest, 500 in number are women. How many children are there?

**billing and coding**

which of the following will you place below the returned address of a business envolope

**Math**

A boy throws a ball with a horizontal speed of 2.5 m/s at a height of 0.8 m above the ground. The Coefficient Of Restitution between ball and ground is 80%. • Calculate the x− and y−components of the ball’s velocity, immediately after its first bounce. ...

**Algebra**

the approximate distance, S, in feet that an object falls in t seconds when dropped from a height can be found by using the formula S=16t^2. How long will the object have fallen in 8 seconds?

**Geometry**

The Effel Tower in Paris is 328 feet wide at the bottom and 984 feet tall a model of the tower is 12 inches tall What is the width of the model?Round to the nearest tenth

**algebra 2**

Bonnie and Bruce have a rectangular swimming pool that is 6 feet wide and 10 feet long. They are going to build a tile border of uniform width around the pool. They have a 105 square feet of tile. How wide should the border be?

**Physics**

A 50kg sign for a local business is hung from a bar which meets a wall at right angles as shown in figure 1. The bar is 1.5 meters long, and it's mass may be neglected. The center of mass of th sign is 1.0 meters from the wall (but .50 meters from the tip of the cable) as ...

**UNIBEN Demonstration secondary school, benin city,Nigeria**

how to calculate mole fraction

**math**

In a class of 40 students 18 passed economics 19 passed accounts 16 passed economics 6 passed mathematics only 9 passed accounts only 5 passed mathematics and accounts only 2 passed accounts and economics only. How many failed in all the papers? How many failed in economics? ...

**Physics**

An automobile and a truck start from rest at the same instant, with the automobile initially at some distance behind the truck. The truck has a constant acceleration of 2.15m/s2 , and the automobile an acceleration of 3.47m/s2 . The automobile overtakes the truck after the ...

**Chemistry**

1 mol of any gas occupies 22.4L of space at STP. 2L of H2 spread in 22.4L of space =2/22= .089molH2 According to the equation, 1 mol H2 is produced from 1 mol of Zn. .089molH2 * 65.38gZn = 5.8gZn

**HESI**

27.81

**history**

She Do Help Us you Idiot She always Helps you are just lazy go back to the text

**International Accounting**

On December 1, Year1, El Primero Company purchases inventory from a foreign supplier for 40,000 coronas. Payment will be made in 90 days after El Primero has sold this merchandise. Sales are made rather quickly and El Primero pays this entire obligation on February 15, Year 2...

**Language Arts**

Thank you so much Ms Sue!

**Language Arts**

Jillian ran around the track as fast as she could Seth waited on the corner for the bus to arrive The house on top of the hill looked abandoned The squirrel sensing danger hid behind a tree

**Language Arts**

Which of the following sentences contains a prepositional phrase that acts as an adjective?

**math**

(10^2t)-2(10^t)+1=0 let 10^t=y please help

**math**

I NEED HELP MF

**Math**

nvm i guessed 120 and got it right

**Math**

Simplify the expression 6P3. I don't know how to solve it so if you could help me with it as well i would really appreciate it.

**AP Chemistry**

Determine the volumes of 0.10 M CH3COOH and 0.10 M CH3COONa required to prepare 10.0 mL of buffer of each of the following pH values? a. Ph 3.7 b. pH 5.7 C. pH 5.7 I just need to see how to do one of them and I'll understand how to do the rest.

**PE**

1 i got ankle sprain 2 i don't really understand it 3 you got it right its a

**chemistry**

Sulfur dioxide and oxygen gases react at high temperature (400 o C) in the presence of a catalyst(like Pt) to form sulfur trioxide gas. The reaction is started from a gas mixture at 400oC with the partial pressures PSO2 = 15 atm and PO2= 10. atm. What will be the final partial...

**chemistry**

Hydrogen gas (7.0 mL) is mixed with chlorine gas(4.0 mL) at a certain pressure and temperature. A reaction between H2and Cl2 is initiated by UV light. If pressure and temperature are kept constant, which gases and in which volumes will be found after the reaction is completed?

**Physics**

I don't know where to even begin... Two equally charged ping pong balls, each having a mass of 5g repel eachother hanging from different strings attached at the same fixed point above. The angle each makes with the vertical is 30 degrees and they are separated by a ...

**English**

My child is autistic and we try our best.

**English**

I am helping my child and didn't read much of the book Dragonwings, so can you help me to answer what is moon shadows point of view of the opium dens.

**Math**

45

**PHYsics**

A centrifuge for separation of sugar crystals in molasses must exert a force of 6 N/g. If the filter drum has a radius of 350 mm, determine the required speed in the revolution per minute I tried the following F = 6 = 10^-3*a a = 6000 = ω^2*r

**math**

A city park employee collected 600 cents in nickels, dimes and quarters at the bottom of a wishing well. There were 10 nickels and a combined total of 25 dimes and quarters. How many dimes and quarters were at the bottom of the well? I know the answer but need help with what ...

**chemistry**

The Equation is going to be E = constant + (0.05916)log[X] find constant first use that constant to find the new []

**Math**

(-24,-15)

**physics**

A copper atom has 29 electrons revolving around the nucleus. A copper ball has 4x10^23 atoms. What fraction of the electrons be removed to give the ball a charge of +9.6uC?

**Pschology 202**

well- being

**Pschology 202**

true

**Chemistry**

I, II, III

**Math**

You run 21 miles in 6 days. find the rate.

**Math**

2/8

**Managerial Accounting**

Waterways is thinking of mass-producing one of its special-order sprinklers. To do so would increase variable costs for all sprinklers by an average of $0.70 per unit. The company also estimates that this change could increase the overall number of sprinklers sold by 10%, and ...

**Accounting**

Waterways is thinking of mass-producing one of its special-order sprinklers. To do so would increase variable costs for all sprinklers by an average of $0.70 per unit. The company also estimates that this change could increase the overall number of sprinklers sold by 10%, and ...

**chemistry**

10 l of a solution containing 1.5 moles of HI

**Physics**

Consider an air-bubble level that is sitting on a horizontal surface. Initially, the air bubble is in the middle of the horizontal glass tube. (a) If the level is pushed and a force is applied to accelerate it, which way would the bubble move? Which way would the bubble move ...

**Physics**

A 100 kg crate rest at the back of the bed of a pick up truck. The length of the crate is 1 m in the length of the bed is 4 m. There is no friction between the bed of the truck in the crate. If the truck is traveling at 25 m/s just before it hits the wall, how long before the ...

**Maths**

To solve for the two values of y

**scdience**

the density of gas was done twice, but with the tablet and 15 cm^3 of water in each case.When the rubber tube was placed as shown , 435 cm^3 of gas was collected. When the tube reached only slightly beyond the mouth of the bottle, only 370 cm^3 of gas was collected. The change...

**math**

n-1/2

**math**

first string sports can purchase sneakers for $450 per dozen less trade discounts of 14/12 from ideal shoes. Fancy footwear is offering the same sneakers for $435 less trade discounts of 18/6. Which supplier offers a lower net price? would i be correct if i said first string ...

**math**

Would I be correct if I put $54.58 as my answer, Steve?

**math**

okay i get that so would i be correct if i did 889.00*61.4? since trade discount equals list price * trade discount percentage?

**math**

A watch with a list price of $889.00 is sold by a wholesaler at a net cost of $545.75. Find the single trade discount rate being offered. round to the nearest tenth of a percent To solve this i did 545.75 divided by 889.00 that gave me 0.61389 which comes out to 61.4% if i ...

**math**

so would i be correct if i got $155.56 as an answer, Lucina?

**math**

The list price of a set of fine china is $345.70 and the trade discount is 55%. Find the net cost. I did $345.70 *.55= 190.14 that gives me the trade discount. i'm confused on how i then find the net cost, do i subtract 190.14 from 345.70 to get the net cost?

**math**

The ratio is 2:7>their mom gives each of them the 15 marbles and now David has twice as many marbles as Charlie.How many marbles does each boy have

**math**

The ratio of Juma’s and Akinyi's earnings was 5:3. Juma’s earnings rose to shilling 8400 after an increase of 12%. Calculate the percentage increase in Akinyi’s earning given that the sum of their new earnings was shilling 14100. (b) Juma and Akinyi ...

**Business Math**

Find the ordinary interest to the nearest cent. $19,000 at 12% for 101 days

**math**

In the geometric progression, the first is a and the common ratio is r. The sun of the first two terms is 12 and the third term is 16 Determine the ratio (ar^2)/(a+ar) If the first term is larger than the second term, find the value of r.

**math**

A perpendicular to the line -4x +3 = 0 point (8, 5). Determine its equation x = 4/3 undefined y = 5

**Math**

A fuel dealer makes a profit of shillings 520 for every 1000 liters of petrol sold and shillings 480 for every 1000 liters of diesel sold. In a certain month the dealer sold twice as much diesel as petrol. If the total fuel sold that month was 900,000 liters, find the dealer&#...

**science**

In an experiment to determine the speed of sound, two observers, A and B, were stationed 5.0 km apart. Each was equipped with a gun and a stopwatch. Observer A heard the report of B's gun 15.5 s after seeing it's flash. Later, A fired his gun and B heard the report 14....

**physics**

h=v_0+at^2 h=0+(-9.8)t^2 h=96.4(t) .45h=96.4(1) h=96.1/0.45 h=213.422ft

**math**

its no proof but you could see the results are: 3/2, 6/5, 15/14,42/41,123/122,366/365,1095/1094,3282/3281,9843/9842. as you could see it comes closer and closer to 1 therfore its limit is 1.

**math**

I can answer the second part. Obviously it converges to 1. But i do not know how to prove it... I do not know if it is legit but maybe since you know the limit is 1 use definition: For every n>N |a_n-1|<epsilon and prove this way.

**ELA FAST HELP URGENT**

It's A. Limericks are witty poems that are about 5 lines long. There was a young lady of Niger who smiled as she rode on a tiger; They returned from the ride with the lady inside, and the smile on the face of the tiger.

**physics**

At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constant acceleration of 2.10m/s2 . At the same instant, a truck, traveling with a constant speed of 15.1m/s , overtakes and passes the automobile. How far ...

**physics**

A rod with length L and mass m stand on a frictionless table. a ball with mass m and speed u cimped perpendicular to the rod a distance x from the bottom of the rod and sticks to it. what is the angular velocity of the rod+ball after the collison? I need help on how to solve ...

**math**

if your body releases about a liter of saliva a day how many years to release a kiloliter

**math**

what are all the rectangular pens you can build with 16 yds of fencing

**Physics**

A car slows down from a speed of 24.0m/s to rest in 9.0s, How far did it travel in that time?

**Physics**

car leaves skid mark 72m in length with a deceleration speed of 7.20m/s^2. what was the initial speed prior to braking?

**Physics**

A car leaves skid marks 72m in length. The deceleration is 7.2m/s^2. What is the speed of the car before braking?

**Chemistry**

How much energy (in kilojoules) is released when 15.2g of steam at 114.5∘C is condensed to give liquid water at 63.5∘C? The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/(K⋅mol) for the liquid and 33.6 J/(K⋅...

**accounting**

did you ever get your answer

**english**

Write a narrative essay that ends with 'once beaten, twice shy'

**physics**

A heavy table of mass M is vibrationally isolated by being hung from the ceiling by springs, so that its frequency of vertical oscillation is \omega_0 (take \omega_0 to be 2\pi/sec, a typical value). Assume now that the ceiling vibrates vertically with amplitude A at frequency...