# Posts by Melissa

Total # Posts: 1,315

**Microbiology**

if the original concentration of phage was markedly increased from the concentration that you received, how could you ensure that you had between 30-300 plaques on your plate? (instead of TNTC)

**Statistic HELPPPPPP**

A linear model can be used to describe the relationship between fuel economy(mpg) and horsepower (hp) for certain automobile models. mpg=46.868-0.0838 hp R^2=75.5% 1) Give the symbol and the value of the correlation coefficient. 2)What would the gas mileage be for a car with a...

**math**

A Model M3SWE mandolin has a list price of $1299.90, with a chain discount of 5/3/2. (A) What would be the trade discount amount? (B) What would be the net price?

**Math**

Amy Powell invested $8500 twice a year in an ordinary annuity at New York Securities for a period of 5 years at an annual interest rate of 10% compounded semiannually. Using the ordinary annuity table , calculate the total value of the annuity at the end of the 5-year period

**Diff eq**

y'(x)=sqrt2y(x)+7, y(4)=1 Solve the seperable diff eq

**Stat Help Please**

Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to screen.

**Stat Help Please**

Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to screen.

**history**

Who came to power in China, instituting a Communist regime that would bring great suffering to the nation's people

**Math**

I don't get this question at all.Can you help me?

**Global History**

How were the Mongols able to conquer so much territory so rapidly?

**statistics**

A television program director has 14 shows available for Monday night and 5 shows must be chosen. How many different possible combinations are there?

**math**

a wheel makes 8 1/10 revolutions per minute if it rotates for 85 mins. how many revolutions will it make

**Math**

The Midtown Middle School cheerleaders earned $175 at a car wash. If this amount is 25% of the cost of a new set of uniforms, what is the total cost fora a set of uniforms? Explain your reasoning.

**general chemistry**

so to get volume, you do v=(1.33)*3.14*99e-7^3????

**general chemistry**

the radius of a chlorine atom is 99 pm and its mass is 5.89 X 10^-23 grams what is the density

**chemistry**

inorganic chemistry

**chemistry**

I am supposed to add NH4 and C2H3O2 together and write the new ion. Would it be NH7C2O2? do I add the hydrogens together and were would it go in the order then?

**Sociology HELPPPP**

How does deviance and crime function both for and against society? Be sure to include social control in your answer group.

**Chemistry**

so you get your 760 torr because that is your total and you subtract your 17.5 torr and you get 742.5 and that is your pO2

**Vector Calculus**

An airplane is traveling in the direction 20degrees west of north at 700 km/hr. Find the component form of velocity of the airplane assuming that the positive x-axis represents due east and the positive y-axis represents due north.

**american government**

judicial review is the power of the american courts to:

**algebra**

Determine which of the flowing points lie on the line given by the equation 3x+6y=12

**Physics**

A sound wave is traveling in warm air when it hits a layer of cold, dense air. If the sound wave hits the cold air interface at an angle of 23 degree angle, what is the angle of refraction? Assume that the cold air temperature is -10 degrees C and the warm air temperature is +...

**physics**

A particular guitar string is supposed to vibrate at 210Hz , but it is measured to vibrate at 220Hz By what percent should the tension in the string be changed to correct the frequency?

**Physics**

Assuming the fluid has a density of 1.00 (g/cm^) at what height h should the bottle be placed so the liquid pressure is 38mm-Hg ? B.At what height h should the bottle be placed so the liquid pressure is 460mm-H_2O ? C.If the blood pressure is 18 {mm-Hg} above atmospheric ...

**Physics**

Determine the minimum gauge pressure needed in the water pipe leading into a building if water is to come out of a faucet on the twelfth floor, 40m above that pipe. Pa?

**Physics**

A 7.9cm diameter horizontal pipe gradually narrows to 5.9cm . When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 31.0kPa and 21.0kPa , respectively. What is the volume rate of flow? in m3/s please help!

**Biology**

The half-life of Carbon-14 is 5730 years. What is the age of a fossil containing 1/16 the amount of Carbon-14 of living organisms? Explain your calculation.

**Physics**

a child twirls a yo-yo about in a horizontal circle. The yo-yo has a mass of 0.20 kg and is attached to a string 0.8 m long. what is the velocity of the yo-yo? thanks!

**physics**

A 160kg horizontal beam is supported at each end. A 330kg piano rests a quarter of the way from one end. What is the vertical force on each of the supports?

**Physics**

SOrry! the units are 11500rmp 1.52 m*N 6.07kg 0.0750m

**Physics**

A centrifuge rotor rotating at 11500 is shut off and is eventually brought uniformly to rest by a frictional torque of 1.52 . a.If the mass of the rotor is 6.07 and it can be approximated as a solid cylinder of radius 0.0750 , through how many revolutions will the rotor turn ...

**Algerbra**

Combine and show all work please 3/2y+2/y-1-2/y

**Algerbra**

simplify a-1/a ___________ 2+3/2+1/a^2

**math**

Use the tangent line approximation to approximate the value of ln(1.004)

**Chemistry**

thanks! But it turns out I was over thinking it!

**Chemistry**

In this lab experiment you will make 100.0 mL of a 0.100 M solution of Co(NO3)2. However you must calculate the number of moles of compound that will be needed (moles= Molarity x Liters).Then calculate the mass of Co(NO3)2 that will need to be weighed out (mass= moles x molar ...

**math**

a small business loan in the amount of 50,000 with an interest rate of 9% that compounds monthly for 7 years what would my monthly payment be

**math**

State a trigonometric ratio that is equivalent to each of the following trigonometric ratios Sin 3pie/10 Cos 6pie/7

**Physics**

A hydraulic lift is used to jack a 780 kg car 15 cm off the floor. The diameter of the output piston is 15 cm, and the input force is 160 N. a)What is the area of the input piston (in m^2)? b)What is the work done in lifting the car 15 cm? c)If the input piston moves 13 cm in ...

**Physics**

Calculate the true mass (in vacuum) of a piece of aluminum whose apparent mass is 1.6000kg when weighed in air.

**physics**

A newspaper carrier on delivery route travels 200.-m South-West and 300.-m West. What is the direction of the displacement

**physics**

A newspaper carrier on delivery route travels 200.-m South-West and 300.-m West. What is the magnitude of the displacement?

**accounting**

Analyze and record, in the form of T Accounts, Mr. James' transactions: Jan 1: Amount invested in the business $10,000 Jan 7: Bought equipment for $500 Jan 9: Bought office furniture with $2,000 cash Jan 10: Bought materials with $2,000 cash Jan 17: Sold part of equipment...

**Chemistry**

convert 458166 atoms of H20 to moles

**pre algebra**

A woman who is 5feet 4 inches cast a shadow that is 6 feet tall. How long of a shadow would be cast by a man who is 6 feet 8 inches tall

**Algerbra**

George pays a flat amount for the first 200 minutes plus so much for each additional minute on his cellular phone each month. Last month it cost him $33.78 for 244 minutes of use. The previous month it cost $38.94 for 287 minutes of use. What are the flat rate and per minute ...

**Math**

Jared can paddle his canoe 1 mile upstream in 1 hour, but it takes only a half hour to paddle back the same distance. Find the speed of water. (Hint: d=rt and the rate or canoe speed, depending on which way he is going.)

**Calc**

Find all solutions of the equation (sec(x))^2−2=0 The answer is A+Bk where k is any integer and 0<A<pi/2 Find: A= pi/4? B=??

**English**

About what?

**Math**

Find all solutions of the equation (sec(x))^2−2=0 The answer is A+Bk where k is any integer and 0<A<pi/2 Find: A= pi/4? B=??

**Math**

Show how to make one addend a ten. Complete the new addition sentence. 38 + 25=? ---- + ---- =

**algebra**

2st squared -s squared. S=4 t=8

**geometry**

If the endpoints of the diameter of a circle are (3, 1) and (6, 5), find the length of the diameter.

**Physics**

Takeoff Speed= Range=(initial velocity^2 * Sin (2 theta))/g 11m = (V0^2*sin(36))/(9.8) V0= sqrt((11*9.8)/(sin36)) V0=13.54

**o Chem**

a sample consisting of 1-bromopropane and 1-chloropropane isinjected into a gas chromatograph quipped with a nonpolar column.which compound has the shorter retention time? Explaine the answer. b.if the same sample were run several days later with theconditions as nearly the ...

**math**

The function f(x) = ax^3-x^2+bx-24 has three factors. Two of these factors are x-2 and x+4. Determine the values of a and b, and then determine the other factor

**math**

An open topped box can be created by cutting congruent squares from each of the 4 corners of a piece of cardboard that has dimensions of 20cm by 30cm and folding up the sides. Determine the dimensions of the squares that must be cut to create a box with a volume of 1008cm^3

**math**

An open box is made from a rectangular piece of cardboard, with dimensions of 24 cm by 30 cm, by cutting congruent squares from each corner and folding up the sides. Determine the dimensions of the squares to be cut to create a box with a volume of 1040 cm ^3

**world geography**

economics status, social status.

**world geography**

What processes cause changes in settlement patterns?

**world Geography**

Culture, age, money.

**world Geography**

What social factors determine population trends and demographics of a region?

**World Geography**

What human and physical features influence the size and distribution of settlements?

**World Geography**

Work, distance, stores

**World Geography**

What economic factors determine population trends and demographics of a region?

**World Geography**

The economy if its bad..not able to survive there, social status.

**World Geography**

What processes cause changes in settlement patterns?

**World Geography**

Push factors are those that encourage a migrant to leave his place of residence. Includes cost of living, personal safety, environmental catastrophes or more minor issues suc as weather and climate. Pull factors are those that attract a migrant to a country, such as the ...

**World Geography**

How do push and full factors and physical geography affect immigration?

**math**

The volume of a rectangular box is (x^3+6x^2+11x+6) cm^3. The box is (x+3) cm long and (x+2) cm wide . How high is the box

**math**

Consider the function f(x)=x^3+4x^2+kx-4. The remainder from f(x)/(x+2) is twice the remainder from f(x) / (x-2). Determine the value of k

**math**

The function f(x)=ax^3-x^3+bx-24 has three factors. Two of these factors are x-2 and x+4. Determine the values of a and b , and then determine the other factor

**3rd Grade Math**

title is class collection data week 1

**math**

Factor each expression (X+5)^3-(2x+1)^3

**math**

Factor each expression (X+5)^3-(2x+1)^3

**World History**

In the question "Why the haitian revolution probably truer to itself than it's French or American counterparts?" Is it referring to how the Haitian revolution stayed truer to their cause in revolution because they gave everyone equal rights, while american and ...

**math**

Each dividend was divided by another polynomial, resulting in the given quotient and remainder. Find the divisor Divided:5x^3+x^2+3 ,quotient:5x^2-14x+42, remainder:-123

**world history**

I have no idea. someone help me too!!!

**health**

why is having excessive abdominal fat a serious concern

**O Chem**

Comment on the suitability of running a infared spectrum under these conditions A KBr pellet is prepared with a compound that melts at 200 C same question but at 30 C

**O chem**

comment on suitability of running infared spectrum under the following conditions: A neat spectrum of liquid with a boiling point of 150 C is determined with salt plates. and same question but at 35 C

**math**

the final grade for a particular course is calculated by dividing total points earned by total points available. There are 6 quizzes worth 15 points each, and 2 exams worth 50 points each. If a student earns 67 points total on the quizzes and wants to get at least 86% in the ...

**math**

Evaluate f(x) = x^2+3-4 For f(1/4)

**math**

156 / 55 - how do i show my work for long division?

**Art**

thank you.

**Art**

Just a fast question. Im writing about Gothic stained glass windows, and was wondering if in the decorations on the windows was Christ depicted in them ?

**algebra**

Write a rule in words and as an algebraic expression to model the relationship in each table. The local video store charges a monthly membership fee of $5 and $2.25 per video. 1 video is $7.25 2 videos are $9.50 3 videos are $11.75

**Algebra**

Please help me with this algebra question?!?!?!? Find the discriminant of the equation in terms of p and q. Suppose q<p<0. Tell how many real solutions the equation has. px^2+qx-p I really need help with this math question! And indoor gym room consists of a rectangular ...

**HEALTH**

Man im here for ashworth and ms sue keeps messing me up

**Math computation**

8 9/15 - 1/2 = A.8 8/13 B.8 4/15 C.8 8/15 D.8 8/1 E. None of these A? 5/6 / 15= A. 1/2 B. 10 5/7 C. 18 D. 1/18 B?

**math concepts and applications**

Which of these is another way to write 11/50? A. 11% B. 22% C. 110% D. 220% A?

**math concepts and applications**

B?

**math concepts and applications**

A rectangle has a length of 6 meters and a perimeter of 20 meters. What is the width of the rectangle? A. 4 meters B. 7 meters C. 14 meters D. 52 meters C ?

**math concepts and applications**

What number completes this number sentence? 3x(5+8)= (3x5)+(__x8) F.3 G.5 H.15 J.24 F ?

**math concepts and applications**

What is the volume of a triangular prism that has a base area of 30 mm2 and height of 18 mm? (v=bh) A.48 mm3 B.96 mm3 C.270 mm3 D.540 mm3 A?

**Math concepts and applications**

B?

**Math concepts and applications**

which number sentence is true ? A.0.027 < 0.0027 B.0.0027 < 0.027 C.0.27 < 0.027 D.2.7 <0.27 D?

**math**

8 9 A)8 8/13 b)8 4/15 c)8 8/15 _ D)8 1/10 i think a 15 - 1 _ 2 _______