# nick

Newest questions and responses by nick-
## History

What items brought to the Americas from Europe in the Columbian Exchange changed Native Americans' daily lives? Select all that apply. A.horses B.corn C.cows D.potatoes E. sugar

*asked on February 28, 2019* -
## math

A lot measures 75 ft by 100 ft. It is all lawn except for the house on the lot. The house measures 30 ft by 50 ft. What is the area of the lawn?

*asked on February 14, 2019* -
## Algebra

What expression gives the solutions of -5+2x^2=-6x?

*asked on January 22, 2019* -
## geography

why did English settlers wanted to hide their colony from Spaniards

*asked on January 10, 2019* -
## Social Studies

Which of the following accurately describes the workforce of both the U.S and Canada? A. Most jobs in both countries are found in service industry. B. Most jobs in both countries are found in manufacturing. C. Most jobs in both countries are faced with

*asked on December 12, 2018* -
## Chemistry

Prediction of colors for V(CN)6 ^-2, VCl6 ^-2, and V(edta)? I think the above are transition metal complexes and if it helps the link below contains some of the energy levels and colors imgur.com/gallery/S1w9XFi

*asked on November 21, 2018* -
## Chemistry

When 200 mL of an aqueous benzoic acid solution were extracted with 30 mL of ethyl actetate 45% of the benzoic acid were extracted. Calculate the partition coefficient of benzoic acid.

*asked on September 27, 2018* -
## Calculus

Using separation of variables, solve the following differential equation with initial conditions dy/dx = e^(2x+3y) and y(0) = 1. Hint: use a property of exponentials to rewrite the differential equation so it can be separated

*asked on August 14, 2018* -
## Chemistry

Need help with Chemistry, thanks in advance! For the system: 2H2O(g) ↔ 2H2(g) + O2(g) ; at equilibrium 27.0g of H2O, 0.25g of H2 and 16.0g of O2 was found in a 5.0L flask. Calculate the equilibrium constant, Keq.

*asked on April 11, 2018* -
## Chemistry

When 400ml of a 0.01M MgCl2 solution is mixed with a 300ml if a NaOH solution at pH 9.0, a precipitate will form. True or False?

*asked on April 9, 2018* -
## Trigonometry

Prove cot u - cot 2u=cosec 2u?

*asked on March 21, 2018* -
## math

graph the function and use graph to find the indicated limit f(x) = 7e^x, Lim x --> 0 F(x)

*asked on February 27, 2018* -
## Calculus

If an arrow is shot upward on Mars with a speed of 52 m/s, its height in meters t seconds later is given by y = 52t − 1.86t2. (Round your answers to two decimal places.) What is the average speed over the given time intervals? (i) [1, 2] (ii) [1, 1.5]

*asked on January 31, 2018* -
## Calculus

If an arrow is shot upward on Mars with a speed of 52 m/s, its height in meters t seconds later is given by y = 52t − 1.86t2. (Round your answers to two decimal places.) What is the average speed over the given time intervals? (i) [1, 2] (ii) [1, 1.5]

*asked on January 31, 2018* -
## Calculus

If an arrow is shot upward on Mars with a speed of 52 m/s, its height in meters t seconds later is given by y = 52t − 1.86t2. (Round your answers to two decimal places.) (i) [1, 2] (ii) [1, 1.5] (iii) [1, 1.1] (iv) [1, 1.01] (v) [1, 1.001]

*asked on January 31, 2018* -
## Science

Explain the reaction (iron sulpide) using the Big Idea of Energy?

*asked on January 12, 2018* -
## precalc

find the standard form of the hyperbola, the center and vertices given the foci (0, -+8) and asymptotes at y=4x

*asked on December 12, 2017* -
## Chemistry

In an experiment, 95.0 mL of 0.225 M silver nitrate was mixed rapidly with 47.5 mL of 0.225 M calcium chloride in a coffee cup calorimeter. If a reaction occurred, was it exothermic or endothermic? If the reaction started at 23.7 °C, what is the final

*asked on October 12, 2017* -
## Math

In the early months of some year, one site added 0.5 million new accounts every day. At this rate, how many days would be needed to add 40 million new accounts?

*asked on October 9, 2017* -
## Math

A car has a fuel efficiency of 33 miled per gallon.(a) Find a function G that calculates the number of gallons required to travel x miles. (b)If the cost of gas is $4 per gallon, find the function C that calculates the cost of fuel to travel x miles.

*asked on October 9, 2017* -
## Sociology

How would a conflict theorist analyze the attitude about the feminist perspective?

*asked on October 3, 2017* -
## chem

1m^3= cm^3 is it 1000000cm^3?

*asked on September 23, 2017* -
## algebra

Mark, Tony, and Grant decided to eat a 72-inch sub in one sitting. They divided it so that Tony (the big eater) would eat 8 inches less than triple what Mark would eat. That left Grant with a portion that was 5 inches longer than Mark's portion. How big

*asked on September 19, 2017* -
## math

find the reference angle, quadrant, and rotational angle for the point (3,-8)

*asked on September 18, 2017* -
## Phase Transformation

Concentration vs Distance plots resemble _____________ . Lognormal distribution Binomial distribution Lorentzian distribution Gaussian distribution

*asked on August 13, 2017* -
## Phase Transformation

Change in Gibbs free energy is _____ related to interfacial energy and _____ related to radius of precipitate. directly, inversely inversely, directly directly, directly inversely, inversely

*asked on August 13, 2017* -
## Phase Transformation

Which of the following phase diagram shows liquid immiscibility ? Eutectic Peritectic Monotectic Eutectoid None of these

*asked on August 13, 2017* -
## history

Explain how the Lend/Lease Act meant that the United States really wasn't being "neutral" before they joined WWII.

*asked on June 9, 2017* -
## Math

MIKE has a dog pen with an area of 120 sq. Feet. What is its width?

*asked on May 30, 2017* -
## Math

What is 7/2 into a proper fraction?

*asked on May 3, 2017* -
## Statistics

The correlation coefficient between X and Y is the same as the correlation coefficient between Y and X. True - If you were to find the correlation coefficient with a given data set for x and y, it would have the same correlation coefficient value as y and

*asked on April 23, 2017* -
## Chemistry

What volume will 11.2 grams of H2 gas occupy at 25.1oC and a pressure of 758 mmHg?

*asked on April 5, 2017* -
## Genetics

Alkaptonuria is a recessive trait. If tow parents are carriers(heterozygous, unaffected), what is the chance they would have: A. 2 children, both with alkaptonuria? B. 3 children, all 3 not having alkaptonuria? C. 5 children, the first 3 not having

*asked on February 27, 2017* -
## Math

Lisa is running around the circular track x^2+y^2=10000, whose radius is 100 meters, at 4 meters per second. She starts at point (100,0) and runs in the counterclockwise direction. After 30 minutes of running, what are her coordinates?

*asked on February 21, 2017* -
## Math

Using suffix notation and the summation convention, prove that u.del*u= w x u+ del(1/2q^2) where w= del x u and q= /u/?

*asked on February 4, 2017* -
## Math (Tensor Notation)

Using suffix notation and the summation convention prove that u.del(u)= w x u + del(1/2q^2) where w= del x u and q=/u/

*asked on February 4, 2017* -
## stats

Industry standards suggest that 18% of new vehicles require warranty service within the first year. Jones Nissan, sold 11 Nissans yesterday What is the probability that less than three of these vehicles require warranty service?

*asked on February 1, 2017* -
## Math

I need help solving equation it says to round to the neatest hundredth if needed the problem is 9- 6(1-5a)=-26

*asked on January 5, 2017* -
## pre calc

-1less or equal to x less then 4, state raltion represented by y=[2x]+1 by listing ordered pairs

*asked on December 14, 2016* -
## Calculus

the sum of three positive numbers is 40. The first plus three times the second plus four times the third add up to 80. Select the numbers so that the product of all three is as large as possible.

*asked on December 12, 2016* -
## Physics

A tension spring opposes being stretched, but offers no resistance to being compressed (think of a slinky!). A tension spring, with an equilibrium length of 1.25 m, is suspended by one end from a ceiling at a height of 2.5 m above the ground; a mass of 100

*asked on November 26, 2016* -
## math

A rectangular poster is to have 50 squared inches for printed matter. It is to have a 1 inch. margin on each side and a 2 inch. margin at the top and bottom. Find the dimensions of the poster so that the amount of paper used is minimized. Horizonatal

*asked on November 21, 2016* -
## Physics

A car is proceeding at a speed of 14.0 m/s when it collides with a stationary car in front. During the collision, the fist car moves a distance of 0.350 m as it comes to a stop. The driver is wearing her seat belt, so she remains in her seat during the

*asked on November 15, 2016* -
## Science

Help pzzzzzz Sound in an empty room can be very loud,with many echoes.Describe three ways to make the room quieter?

*asked on November 15, 2016* -
## maa central

a set is composed of marbles with different colors, namely: 5 blue marbles, 3 red marbles and 2 gren marbles.What is the fractional form of blue marbles?

*asked on November 2, 2016* -
## Math

If there are 35 kids in a class and 22 are girls what is the ratio of girls to boys in the class

*asked on October 22, 2016* -
## Math

3. (2.56 x 10^6) x (3.56 x 10^2) = a. 9.1136 x 10^12 b. 91.136 x 10^8 c. 9.1136 x 10^8 d. 91.136 x 10^12 4. In a recent year, the population of California was about 2.52 x 10^7 people. Its land area is about 4.05 x 10^5 km2. What was the average number of

*asked on October 21, 2016* -
## math

Find the angle of depression from the top of a lighthouse 191 feet above the water level to the water line of a ship 4 miles offshore.

*asked on October 19, 2016* -
## chemistry

Gold has a latent heat fusion of 64.5 J/g. How much energy is required to melt 20.0 g of gold?

*asked on October 18, 2016* -
## chemistry

Ethyl alcohol has a heat of vaporization of 850. J/g. What mass of ethyl alcohol can be boiled using 15000 J of energy?

*asked on October 18, 2016* -
## chemistry

A student melts 50.0 grams of ice using 16650 J of energy. What is the heat of fusion of ice?

*asked on October 18, 2016* -
## physics (super hard)

a carnival ride is designed with seats that carry two people weighing 910.0 N each. the seats itself weights 630 N.each seat is connected to central spindle by one chain and rotates on a radios of 6.07 meters. the ride is designed to rotate fast enough

*asked on October 9, 2016* -
## physics

a grandfather clock is designed to have a pendulum which swings a mass at the end of the chain in a horizontal circular motion. the pendulum is designed to swing 7 degrees off of the vertical. the chain is 1.50 meters long and the maximum tension in the

*asked on October 9, 2016* -
## physics

an 85kg concrete block rests on a flat surface with coefficient of static friction us=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block? please help and show work

*asked on October 9, 2016* -
## physics

determine the minimum radios of a highway curve which has banking angle of 5.74% over which vehicles will travel at 110km/h. assume that there is no friction between the road and the tires. calculate the radios?

*asked on October 9, 2016* -
## math

Five years after purchase, a machine has a value of $300. The depreciation rate is 26% per year. Calculate the value of the machine when it was bought five years ago.?

*asked on October 6, 2016* -
## math

One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again

*asked on September 29, 2016* -
## Math

The minute hand of a colck is 10cm long.How far does the minute hand move in 1 hour?

*asked on September 18, 2016* -
## math

Use an integer to represent the change in the airplane's height. An airplane descends 5,000 feet.

*asked on August 28, 2016* -
## math

use an integer to represent the change in the airplanes height.an airplane descends 5,000 feet.

*asked on August 28, 2016* -
## Math

What is the perimeter in meters of a rectangle that is 13 meters long and 10 meters wide

*asked on May 18, 2016* -
## pysics

550 g of water (cw = 4186 J/kg.K) at 75°C is poured into an 855 g aluminum (cw =900 J/kg.K) container with an initial temperature of 11°C. What is the final temperature of the system, assuming no heat is exchanged with the surroundings? Select one: a. 75

*asked on May 17, 2016* -
## Building Traded

On a print with a scale of 1/2=1FOOT HOW much would a 20 ft hallway be in inches?

*asked on May 11, 2016* -
## Statistics

Listed below are body temperatures for four subjects measured at two different times in a day. Body Temperature (°𝐹) 𝑎𝑡 6 𝑎𝑚: 98.0,97.0,98.6,97.4 Body Temperature (°𝐹) 𝑎𝑡 6 𝑝𝑚: 98.0,97.6,98.8,98.0 Assume the sample data are

*asked on April 26, 2016* -
## Stastics

The UMUC bookstore states the average textbook costs $119. A randomly selected sample of 26 new textbooks at the UMUC bookstore had a mean price of $123.45 and sample standard deviation of $15.23. Use a 0.05 significance level to test the claim that the

*asked on April 26, 2016* -
## Math

If an oval is 225 yards how many feet of fence go around it fence is sold by foot how o I figure it out

*asked on April 22, 2016* -
## Math

How many apples will it take to get 27kg 8 divided by ? equals 27kg

*asked on March 30, 2016* -
## Physics

A man completes 31 lengths of a 50 metre pool with an average speed of 0.9 km/h. What is the magnitude of his average velocity vector in Standard SI units?

*asked on March 30, 2016* -
## Math

What is the rate of the current if a canoe travels 22mph

*asked on March 21, 2016* -
## Chemistry

Using your knowledge of chemical migration, outline the two most possible chemical migration pathways for non-polar C9H12 that has been spilled onto an open field on a warm spring day.

*asked on March 4, 2016* -
## Math

In the questions below P(x,y) means “x and y are real numbers such that x + 2y = 5”. a) Determine whether the statement ∃x∀yP(x,y) is true. b) Negate the statement ∃x∀yP(x,y).

*asked on March 3, 2016* -
## math

if don gecewicz invested $6000 at 8% interest compounded quarterly, find the amount after 7 years

*asked on March 1, 2016* -
## Physics

The figure shows an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley and pulls with a force of magnitude 93.4 N on the wall to which it is attached. The tensions in the shorter cords are T1 =

*asked on February 23, 2016* -
## Math

You live 2 3/4 miles from school. In the morning, you walk 1/3 mile directly toward school to the bus stop. Later, when you get off the bus, you walk home the same distance. How many miles do you ride to and from school each day?

*asked on February 18, 2016* -
## Math

Use the distributive property to solve the equation 8+1/7x=9.

*asked on February 17, 2016* -
## physics

A piece of luggage is being loaded onto an airplane by way of an inclined conveyor belt. The bag, which has a mass of 15.0 kg, travels 4.50 m up the conveyor belt at a constant speed without slipping. If the conveyor belt is inclined at a 30.0° angle,

*asked on February 16, 2016* -
## math

Elaine is making a model of a house that she designed. She wants to put wood molding around two rooms in the model. She measures and finds that she needs feet of molding for one room and feet of molding for the other room. She has feet of molding

*asked on February 2, 2016* -
## Chemistry

Would you expect H 2 SO 3 to be oxidized to H 2 SO 4 in our natural environment? Please explain using the molecules in our environment and the concept of oxidation states.

*asked on January 30, 2016* -
## maths

y=3ln5t/2cos2t

*asked on January 23, 2016* -
## Math

Kenny wants to invest $250 every three months at 5.2%/a compounded quarterly. He would like to have at least $6500 at the end of his investment. How long will he need to make a regular payments? *PLEASE SHOW WORK*

*asked on January 17, 2016* -
## math

when 4 times a number n is decreased by 3 its at most 21

*asked on January 11, 2016* -
## Health

{1} which is the best example of a win-win situation. A. One side gets what it wants.... B. Both sides get what they want but one side get more.... C equal need are met for both sides....D neither side get what it wants. I think C is the answer. {2} A

*asked on January 11, 2016* -
## Business

Tina borrowed some money at 6% simple interest and paid it back exactly seven years later by making a single payment of $4544. How much did she borrow in the first place?

*asked on January 10, 2016* -
## Math

What is {23%,0.21,1/4,1/5} from least to greatest I need the answer today please thank you

*asked on January 4, 2016* -
## Math

If a 14-ft ladder leans against a building, with an angle of elevation of 70°, how far up the building will the ladder reach? I believe this requires law of cosines but otherwise I am lost.

*asked on December 11, 2015* -
## Trigonometry

Peanuts cost $3 per pound, almonds $4 per pound, and cashews $8 per pound. How many pounds of each should be mixed to produce 140 pounds of a nut assortment that cost $6 per pound, in which there are twice as many peanuts as almonds?

*asked on December 4, 2015* -
## Algebra

The sum of two numbers is 53. If twice the 1st number minus 3 times the second number is 26, find both numbers.

*asked on December 1, 2015* -
## Math - Statistics

A six-sided die is rolled 36 times. What is the probability that an odd number is rolled at most 15 times? What is the probability that an odd number is rolled exactly 15 times? Use the Normal Approximation to a Binomial.

*asked on November 30, 2015* -
## Chemistry

In the electrolysis of water 75.0 cm3 of oxygen gas are produced.How many cm3 of hydrogen are produced ?

*asked on November 23, 2015* -
## Algebra

The second of three numbers is three times the first. The third is 5 more than the second. if the second is decreased by twice the third number, the result is five? x 3x 3x-2(3X)=5 x= 3/5 ?

*asked on November 22, 2015* -
## health

Identical twins often have similar interests even if they were not raised together. This shows how ________ influences personality development a) modeling b) a peer group c) environment d) heredity d would someone check this answer.

*asked on November 17, 2015* -
## health

A person who is afraid of heights likely suffers from ( select all that apply ) a)anxiety b) a phobia c) obsessive-compulsive disorder d) an impulse control disorder Would Someone Please Help Me With The answer I Know One Is Phobia But I Don't Know The

*asked on November 17, 2015* -
## Math

an electrician needs to run a cable from the top of a 48-foot tower to a transmitter box located 20 feet away from the base of the tower. Find how long he should cut the cable.

*asked on November 3, 2015* -
## Quantitative Math

Find the amount if $600 is invested at 14% compounded monthly for 15 months. I don't understand how to set this problem up.

*asked on November 1, 2015* -
## Calculus

The formula for the amount (A) in a savings account compounded n times per year for t years at an annual interest rate r, with initial deposit P, is given by A=P(1+r/n)^nt. Evaluate this formula as the number of compoundings per year becomes infinite. (the

*asked on October 27, 2015* -
## Calculus

A baseball player hits a baseball from home base towards second base with a velocity of 90 feet/second. At that same moment, he runs from home base towards first base at 30 feet/second. Find the rate of change of the distance between him and the baseball

*asked on October 27, 2015* -
## math

What is 26cm:4m ratio in simplest form?

*asked on October 20, 2015* -
## Physics

A pilot, whose mass is 70.0 kg, makes a loop-the-loop in a fast jet. Assume that the jet maintains a constant speed of 325 m/s and that the radius of the loop-the-loop is 5.922 km. What is the apparent weight that the pilot feels (i.e., the force with

*asked on October 16, 2015* -
## Math

Nine times twelve minus four times two to the power of two plus six equals sixty eight

*asked on October 5, 2015* -
## algebra I

find all numbers such that a third of a number increased by half that number is at least 3 less than that same number. not sure what to do

*asked on September 23, 2015*