# Greg

Newest questions and responses by Greg-
## statistics

An English teacher needs to pick 10 books to put on her reading list for the next school year and she needs to plan the order in which they should be read. She has narrowed down her choices to 4 novels 8 plays, 5 poetry books, and 5 nonfiction books. If

*asked on February 10, 2019* -
## Photography

The overall impact of all of a photographs features is called what? A. Unity** B. Structure C. Aesthetic D. Emphasis

*asked on November 15, 2018* -
## science

The light from the Sun heats a metal surface. This is an example of A. conduction. B. radiation. C. convection. D. reflection.

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

A rectangular box with a square base and cover is to have a volume of 2500 cubic feet. If the cost per square foot for the bottom is $2, for the top is $3, and for the sides is $1, what should the dimensions be in order to minimize the cost?

*asked on December 10, 2017* -
## math

1.-3(n+5)=12 2.46=-6t-8

*asked on September 27, 2017* -
## Science

How would you experiment to find out how much this plant type needs for optimal growth? I am not sure how to answer this question.

*asked on September 21, 2017* -
## Physics

The density of the dead sea is 1.24x10^3 kg m^-3. A wooden board with an area of 2.5m^2 is dropped in the Dead Sea. Calculate the proportion that would float above the surface. Density of wood= 800kg m^-3

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

Hi I wanted to check my work for this problem. Consider the points A(1,0,0) B(2,2,2) and C(0,2,1). 1) Find the vector CA x CB I got -2i -3j +4k for this 2) Find an exact value for the area of the triangle ABC. I got sqrt29/2 for this. 3) Plane II(1) is

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

Hi, I was working on my math homework and I was stumbling on these problems. I wanted to double check my answers that I have; I also could not answer 5. If vectors O(0,0,0), A(6,0,0), B(6,-sqrt(24), sqrt(12)), and C(0,-sqrt(24), sqrt(12)) form a square. 1)

*asked on April 19, 2017* -
## Chemistry

is the flame coloration a test for the metal or for the acid radical?

*asked on April 18, 2017* -
## vector calculus

Hi, I'm having trouble answering this question. The lines l1 and l2 are defined as l1: (x-1)/3 = (y-5)/2 = (z-12)/-2 l2: (x-1)/8 = (y-5)/11 = (z-12)/6 The plane j contains both l1 and l2. Find the Cartesian equation of j.

*asked on April 18, 2017* -
## Math 11

write the equation in vertex form, of a parabola with vertex (5, -1) and that passes through the point (6, 8)

*asked on April 11, 2017* -
## Math

Katie is baking cookies. She only wants to make 3/4 of the recipe. She needs to take 3/4 of the 2/3 cup of sugar. How much sugar does she need?

*asked on January 24, 2017* -
## Math

Henry needs to cut a 4 2/3 foot board into 5 equal pieces. How long was each piece?

*asked on January 24, 2017* -
## 6th

Approximately 2% percent of the people in the world have red hair. There are about 7,000,000, people in the world.About how many people have red hair?

*asked on January 22, 2017* -
## algebra

A man has two investments. The first pays him 3% interest per year and the other, 4%. The total income from these two investments is $170. If the interest rates were interchanged, the yearly income would be $180. How much is the investment?

*asked on November 5, 2016* -
## Chemistry

What volume of (2.5M) Hydrochloric Acid will be needed to neutralize 359mL of a 1.50M solution of potassium hydroxide?

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

2+3 add each number to itself plus one

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

How many 3/8 foot pieces of wood can you cut from a board that is 1 7/8 feet long?

*asked on August 22, 2016* -
## math

no row or column contains products with only odd numbers , do you agree?

*asked on April 25, 2016* -
## Chemisty

Combustion of hydrogen sulphide with oxygen in kmol H2S +O2 = H2O + SO2 can somebody balance this for me and break it down to the atomic mass.

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

Combustion of hydrogen sulphide with oxygen in kmol H2S +O2 = H2O + SO2 can somebody balance this for me and break it down to the atomic mass.

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

An object is projected directly upward from the ground. Its distance in feet from the ground in t seconds is s equals s=112t−16t^2 The object will be 160 feet from the ground after () second(s) and after () second(s). The object strikes the ground

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

sonya spent 3/8 of her money and had $15 left. how much money did she orginally start with?

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

john has 28 marbles and sue had 157 marbles, after each added the same amount, sue had 4 times more than john. how many did they each add?

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

A seed company claims that 90% of its bean seeds will germinate. If seven of these seeds are planted in warm, moist, soil, what is the probability that exactly 6 of them will germinate? Round answer to nearest ten-thousandth (4 places after decimal)

*asked on March 5, 2016* -
## Math

The Washingtons buy a $260,000 home by putting 20% down and financing the balance with a 30-year fixed-rate 4.2% mortgage, compounded monthly. What is the amount of their monthly loan payment to amortize the loan?

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

If a baseball player has a batting average of 0.420, what is the probability that the player will get at least 2 hits in the next four times at bat?

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

Find the probability of the independent event. If P (E) = 0.9, P (F ∣ E) = 0.36, and E and F are independent, find P (F).

*asked on February 20, 2016* -
## Math

A rectangular swimming pool is bordered by a concrete patio. The width of the patio is the same on every side. The area of the surface of the pool is equal to the area of the patio. What is the width of the patio? (Length of Pool: 24 Width of Pool: 16)

*asked on February 3, 2016* -
## Math

Find the solution to the system of equations by substitution. 2x+5y=8 and 6x+y=10 Would the answer be (1.5,1)?

*asked on January 29, 2016* -
## Statistics

A study was conducted to investigate the relationship between the resale price, y (in hundreds of dollars), and the age, x (in years), of midsize luxury American automobiles. The equation of the line of best fit was determined below. y = 179.3 − 20.78x

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

Solve the sytem of equations using the addition method. 5x+2y=1, x-3y=7

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

The MAthematical model C=500x+80,000 represents the cost in dollars a company has in manufacturing x items during a month. How many items were produced if costs reached $250,000? I'm so stumped I don't even know where to start.

*asked on January 27, 2016* -
## physics

An electrical device contains a transformer. Its primary coil has 200 turns, and its secondary coil has 20 turns. If the device is plugged into a 120-volt line, what is the output voltage of the device?

*asked on November 2, 2015* -
## Algebra

In 2009, a diabetic express company charged $39.95 for a vial of type A insulin and $30.34 for a vial of type B insulin. If a total of $2022.21 was collected for 60 vials of insulin, how many vials of each type were sold?

*asked on August 17, 2015* -
## chemistry

To what volume should you dilute 47.0 mL of a 5.95 M KI solution so that 27.5 mL of the diluted solution contains 3.50 g of KI?

*asked on July 26, 2015* -
## History

Which of the following best explains why trade among the colonies flourished? The different regions specialized in different crops. The colonies had developed large fleets of trading ships. Existing trade routes were well-maintained by Native Americans.

*asked on July 25, 2015* -
## History

Which answer best expresses some of the issues related to economics that are listed in the Declaration of Independence? Cutting off trade and imposing taxes on the colonists are unfair practices. Denying the colonists trial by jury and sending them to

*asked on July 25, 2015* -
## Calculus

Using a graphing calculator and the concept of differentials determine the values for x when 1/(1+3x)^5 is approx = to (1-15x) within .01

*asked on June 21, 2015* -
## stats

Find the probability of at least 2 girls in 10 births. Assume that male and female births are equally likely and that the births are independent events.

*asked on March 16, 2015* -
## statistics

In a certain lottery, five different numbers between 1 and 31 inclusive are drawn. These are the winning numbers. To win the lottery, a person must select the correct 5 numbers in the same exact order in which they were drawn. What is the probability of

*asked on March 16, 2015* -
## chemistry

If four grams of Oxygen and four grams of Helium are placed in a five liter vessel at 338 K, what will be the partial pressure of each gas and the total pressure in the vessel?

*asked on March 5, 2015* -
## Chemistry

Given that the initial rate constant is 0.0190s^-1 at an initial temperature of 20 degrees Celsius, what would the rate constant be at a temperature of 170 degrees Celsius? Activation energy is 32.4kJ/mol

*asked on February 12, 2015* -
## algebra

A math class has a total of 47 students. the number of females is 17 less than the numberof males. how many males and how many females are in class?

*asked on February 8, 2015* -
## Math

Find the adjusted balance due at maturity for a 90 day note of $15000 at 13.7% ordinary interest if a partial payment of $4000 is made on the 60th day of the loan.

*asked on January 27, 2015* -
## Math

How do I find the exact interest on a loan for $3000 with a simple interest annual interest rate of 15% that was made on June 11 and was due on August 11.

*asked on January 27, 2015* -
## chemistry

What mass of precipitate is formed when 0.750 L of 2.50 mol/L CaCl2 reacts with 650 mL of 1.75 mol/L AgNO3

*asked on January 12, 2015* -
## Chemistry

Find the molar concentration of 57.9 g of potassiuum chlorate dissolved in 975 mL of water my work c=nv (57.9/122.55)(975ml) and i got 460 is this correct

*asked on December 16, 2014* -
## Physics

An auditorium has dimensions 10m x 10m x 60m. How many moles of air fill this volume at STP? I'm stumped.

*asked on December 3, 2014* -
## Math

do you borrow his bike for a total of 41 minutes.before lunch,he vote for one minute less than five times the number of minutes he rolled after lunch. how many minutes did you fire ride before lunch

*asked on November 12, 2014* -
## Chemistry 111

Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 17. g of ethane is mixed with 107. g of oxygen. Calculate the minimum mass of ethane that could be left over by the chemical reaction. Be sure your

*asked on October 22, 2014* -
## Physics College

What is the rate of deceleration of a 1400-kg SUV that is going 75.0 km/h and then slows to 25.0 km/h in 8.20 s?

*asked on September 30, 2014* -
## algebra

the sum of to kim and tony's ages is 42, the difference in their ages is 4 years. what are the ages of kim and tony?

*asked on September 22, 2014* -
## Biology

Is respiratory control sensitive to small changes in arterial PO2 or in arterial PCO2?

*asked on September 8, 2014* -
## Physics Electricity and Magnetism

A microscopic droplet of ink in an ink-jet printer is deflected onto the paper by a force of 2.34×10-4 N. If the field causing the deflection is 6.62 kN/C, what is the charge on the droplet? What equation do I use to solve and What does each value mean in

*asked on August 29, 2014* -
## calculus

a small business owner buys a truck for $20,000 to transport supplies for her business. She anticipates that she will use the truck for 5 years and that the truck will be worth $10,000 in 5 years. She plans to claim a depreciation tax credit using the

*asked on August 2, 2014* -
## Physics

How long will it take the voltage across the capacitor in an RC circuit to discharge 75% of its initial charged voltage if the resistor has a resistance of 450 kilo-Ohms and the capacitor has a capacitance of 49 micro-farads? How do I solve this problem?

*asked on August 1, 2014* -
## Math

When you use a coupon for 15 percent off the original price of a headset, you pay $27. What is the original price of the headset? Please use an equation.

*asked on June 2, 2014* -
## Chemistry

Consider the following reaction: CaCO3(s)→CaO(s)+CO2(g). Estimate ΔG∘ for this reaction at each of the following temperatures. (Assume that ΔH∘ and ΔS∘ do not change too much within the given temperature range.) A) 310K B) 1070K C) 1470K And is

*asked on May 14, 2014* -
## math

A truck has 5.9L engine in it. 5.9L of the overall displacement in 6 cylinders each 102mm bore (diameter) and 120mm stroke (length). Engine operates at 16.3:1 compression ratio and with 6psi (0.41atm) of boost cruising at 1600rpm. What is the volume of ONE

*asked on May 4, 2014* -
## Chemistry

Having trouble with this question on my homework =/ 200mL of 0.5M H2SO4 is combined with 500mL of 0.1M NaHCO3. List the physical states of all products, give molarity of aqueous ions and grams of gases and solids. Thanks alot guys!! Any help is awesome

*asked on May 3, 2014* -
## Chemistry

Calculate empirical formula C=41.7%,H=6.2%,N=19.3%, and O=33.1% Thanks. any help at all will be awesome!

*asked on April 22, 2014* -
## Math Accounting

Determine the proposal’s appropriateness and economic viability. For all scenarios, assume spending occurs on the first day of each year and benefits or savings occurs on the last day. Assume the discount rate or weighted average cost of capital is 10%.

*asked on April 9, 2014* -
## math

In right triangle, the side opposite to right angle is called what? ANSWER FAST PLZ!!! THX

*asked on January 29, 2014* -
## TRIG help quickly please

Mark any solutions to the equation 2cos2x - 1 = 0. The answer can be more than one. Thank you π/8 -7π/4 15π/4 3π/4

*asked on January 14, 2014* -
## Science check answers please and quickly

1. Jim is doing a physics experiment on the rate of cooling of solid objects in air. Which of the following is a variable that is not directly part of his experiment, but should be controlled in his experiment? (Points : 1) initial temperature to which he

*asked on January 8, 2014* -
## Check Answers Quick -Physics

What causes the centripetal acceleration of an electron in a hydrogen atom? electrical attraction gravity friction

*asked on December 16, 2013* -
## A/P Biology

The Echinopsis mamillosa is a flowering cactus native to Bolivia. A high-rise building is built near a particular Echinopsis, filtering the amount of direct sunlight it receives. Which of the following processes is negatively affected first by the

*asked on November 14, 2013* -
## Math 8th grade

Type the missing number. -25 -23 -22 -21

*asked on November 9, 2013* -
## math - calc

A conical water tank with vertex down has a radius of 12 feet at the top and is 26 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?

*asked on October 1, 2013* -
## math - calc

A conical water tank with vertex down has a radius of 12 feet at the top and is 26 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?

*asked on October 1, 2013* -
## chemistry science

substrate concentration= 3.5mM (c2) buffer=0.4 ml 10mM PNPP stock= ?ml (V1) water=?ml enzyme= 0.2ml total volume =1ml (V2) I need help with a dilution, I understand that you would be using c1v1=c2v2 but im confused as to what we need to find the amount of

*asked on October 1, 2013* -
## biochemistry

substrate concentration= 3.5mM (c2) buffer=0.4 ml 10mM PNPP stock= ?ml (V1) water=?ml enzyme= 0.2ml total volume =1ml (V2) I need help with a dilution, I understand that you would be using c1v1=c2v2 but im confused as to what we need to find the amount of

*asked on October 1, 2013* -
## Math- factoring

Show all work and factor completely. 6a^2+5a-4 (6a^2+8a)-(3a-4) 2a(3a+4)-1(3a+4) (3a+4)(2a+1) Is this correct?

*asked on September 28, 2013* -
## Math

The Empire Carpet Company orders merchandise for $17,700, including $550 in shipping charges, from Mohawk Carpet Mills on May 4. Carpets valued at $1,390 will be returned because they are damaged. The terms of sale are 2/10, n30 ROG. The shipment arrives

*asked on September 25, 2013* -
## math

if a plane is traveling at an altitude of 11.9 miles and is 46 miles from the airport and is descending at a 12 degree angle, what is the mph to the airport?

*asked on September 19, 2013* -
## Physics

Vector C has a magnitude 25.8 m and is in the direction of the negative y axis. Vectors A and B are at angles á = 41.9° and â = 26.7° up from the x axis respectively. If the vector sum A B C = 0, what are the magnitudes of A and B?

*asked on September 4, 2013* -
## Finite Math

A sinking fund is the accumulated amount to be realized at some future date (the end of the term) when a fixed number of periodic payments are paid into an account earning interest at the rate of i per period.

*asked on July 24, 2013* -
## math

250 people on a plane; 120 speak english;150 speak spanish; 30 speak neither. what probability speak English and Spanish ?

*asked on June 4, 2013* -
## Math

Suppose the quantity demanded per week of a certain dress is related to price by the demand equation p=√75-2x. In order to maximize revenue, how many dresses should be made and sold each week?

*asked on May 6, 2013* -
## calcullus

Suppose the quantity demanded per week of a certain dress is related to price by the demand equation p=√75-2x. In order to maximize revenue, how many dresses should be made and sold each week?

*asked on May 5, 2013* -
## Physics...NEED HELP

Physics help. what are the steps to solving the following problems? Attack on the ice fortress! A comic book villain has taken shelter in an ice fortress in an attempt to hide from the Avengers. Apparently, though, only the Hulk and some guy with a cannon

*asked on May 3, 2013* -
## math

If the probability of an event happening is 2/5, then the probability of the event not happening is 3/5? This is False. The answer is 1/3. Explain why the answer is 1/3

*asked on April 25, 2013* -
## english

is correct to say "the patient was brought to the operating room." ? "was brought" seems awkward. Instead, "the patient was taken to the OR."

*asked on April 22, 2013* -
## computer science

I need help one how create a spreadsheet that will give an accurate launch profile for a vertical liftoff for the SpaceX Falcon 9 rocket. the information they give me is: •Start with a rocket with a mass, M1, moving with a speed, v1 •The rocket expels

*asked on April 13, 2013* -
## volumes of prisms

How do the volume of prisms compare as the number of faces in the prisms increases? Does the volume remain the same? Explain Please!

*asked on April 7, 2013* -
## math

It costs $35 for 5 friends to go it for lunch. How much is the total bill including 8% tax? How much will each person pay if everyone pays an equal amount?

*asked on April 6, 2013* -
## Physics

For parts A-C: /^Vo | 2M | velocity into pg. ->R )2m ) ------ top view rear view A car of mass, 2m, is going around a turn at a constant radius, R, with velocity, v0. The turn is not banked – it is a flat surface. Assume the car and the road are on

*asked on April 6, 2013* -
## Chem

How many kilojoules of energy are needed to convert 104 g of ice at -14.6 to water at 25.8°C? (The specific heat of ice at -14.6 is 2.01 J/g°C.)

*asked on April 4, 2013* -
## chem

Given that Ka for HClO is 4.0 × 10-8 at 25 °C, what is the value of Kb for ClO– at 25 °C? Given that Kb for CH3CH2NH2 is 6.3 × 10-4 at 25 °C, what is the value of Ka for CH3CH2NH3 at 25 °C?

*asked on March 26, 2013* -
## Proctology

Hi, I am an 11th grade student beginning to look into some college options. I am interested in pursuing a career in proctology and have been reading some preliminary books on the topic. Can anyone recommend a college or pre-med program that would offer a

*asked on March 25, 2013* -
## Critical Points, Etc.

find the values for a, b, and c such that the function f(x)= x^3 + ax^2 + bx+ c has a critical point at (1,5) and an inflection point at (2,3). a= -6 b= 3 c= 7 i got those, but they're wrong. i'm not sure why. :/

*asked on March 20, 2013* -
## Tangent Lines (2)-Calculus

find an equation of the line tangent to y= sqrt(25-x^2) at the point (3,4) i got y= x/8 + 29/8 this is wrong. but im not sure why. can you explain thank you

*asked on March 20, 2013* -
## Tangent Lines-Calculus

a line is tangent to the curve y= (x^2 + 3)/ (x+3)^1/2 at the point where x=1. write the equation of this line i get y= 3x-1 yet it's wrong. please explain thank you

*asked on March 20, 2013* -
## Algebra

Linear Function graphing. y=-x ???

*asked on February 7, 2013* -
## Can someone Please Help

You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A What would be the temperature of absolute zero in A ?

*asked on February 4, 2013* -
## Chemistry

You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A What would be the temperature of absolute zero in A ?

*asked on February 4, 2013* -
## Chemistry

Can someone pls help me!! You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A. What would be the boiling point of water in A ? What would be the

*asked on February 2, 2013* -
## Chemistry

You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A. What would be the boiling point of water in A ? What would be the temperature of absolute zero

*asked on February 2, 2013*