Friday

February 24, 2017
Total # Posts: 119

**Maths probability**

Records show that 8% of blood samples tested for a certain condition test positive. Assuming that whether or not a blood sample tests positive is independent of whether or not any other blood sample tests positive, calculate by hand the following probabilities to three signi?...

*January 16, 2017*

**maths**

In an A.P., the first term is 2 and the sum of the first five terms is one-fourth of the next terms. Show that 20th term is -112.

*November 7, 2016*

**Maths**

here are some of the ingredients for bolognese sauce 400g minced beef 800g chopped tomatoes 600ml Stock 300ml red wine Julie has only had 300g of minced beef how much of other ingredients should she use

*October 1, 2016*

**statistics**

Directional and nondirectional hypotheses can be easily interchanged according to the hypothesis the researcher is testing. For instance, a drug company might predict that a drug will help a subject lose weight while another drug company might predict that a drug will alter a ...

*December 11, 2015*

**Math Heeeeelp!!!**

I chose A...i guessed. Its really hard

*May 18, 2015*

**Math Help!!!**

How many 3 letter sequences can be formed if the first letter must always be a consonant (not a, e, i, o, u), the second letter must always be a vowel (a,e,i,o,u) and 3rd letter must be different from the first. A. 2100 B. 4056 C. 3250 D. 2625 I chose A... i guessed

*May 18, 2015*

**Math Help!!!**

How many ways are there to choose a potato and two green vegetables from a choice of three potatoes and seven green vegetables? A. 126 B. 63 C. 21 D. 252 i chose A. But im 50% not sure Please help test tomorrow something similar

*May 18, 2015*

**math Help!!!!**

You have 1 red marble, 1 blue marble, 1 yellow marble and 1 white marble. You draw 2 marbled out of the bag without replacing. What is the probability that you may choose 1 red marble?

*May 18, 2015*

**math...Please help!!!!**

This is a standard deviation question. I don't know much about standard deviation. Here it goes... Teachers making 30,000 to $60,000 the union is considering a $1,000 pay raise. A. Will the standard deviation change and the mean and the median stay the same? B. Will the ...

*May 18, 2015*

**math**

5 kids median age is 9. Two of the kids ages are 5. The range of all the kids is 7. What is the age of the 2nd to the oldest. Please help....! a. 5 b. 7 c. 9 d. 12 to figure it out, i tried this 1. 12 2. 11 3. 9 4. 5 5. 5

*May 15, 2015*

**math**

What is the shape of a linear function on a coordinate plane. choices are: a. circle b. ellipse c. vertical d. horizontal I chose "D"

*May 15, 2015*

**math**

-4 + 6 + 2(7) = I put 2+14 = 16

*May 15, 2015*

**math**

-4 + 6 + 2(7) = I put 2+14 = 16

*May 15, 2015*

**math**

Monday -4 degrees Fahrenheit increase 6 degrees. On Tuesday it increased 2 degrees. For the next 7 days it increased. What is the temperature on the 9th day?

*May 15, 2015*

**math**

Andy averages 17 points per game during 5 games of the basketball season. If he scored 12, 24, 20, 18 in four of the games. How many points did he score in the 5th game. 17 * 5 = 85 12 +24 +20 +18 +x = 74 85-74 = 11

*May 15, 2015*

**math**

The answer is 30

*March 25, 2015*

**Math**

So. The answer is seven

*September 26, 2014*

**business math**

. Ludwig borrowed $8,000 on July 20, at 11% interest. If the loan was due on October 17, what was the amount of interest on the loan using the exact interest method?

*September 7, 2014*

**Cooking catering**

When your creating garnishes which of the following is the most adaptable to creative and interesting shapes

*March 12, 2014*

**Finite Math**

The purchases made by customers at a convenience store are normally distributed, with a mean of $5.50 and a standard deviation of $3.50. What is the probability that a randomly chosen customer makes a purchase between $2.00 and $9.00?

*March 9, 2014*

**art**

What happens when negative and positive shapes begin to fuse together?

*November 26, 2013*

**math**

I don not now how to do this

*November 25, 2013*

**business math**

. $13,027.57

*November 17, 2013*

**Chemistry**

If 23.7g of C8H18 are combusted, what mass of water will be produced?

*September 7, 2013*

**Business Math**

2. The interest on $6,000 at 6 percent compounded semiannually for 8 years is: (Use table in the handbook) (Points : 1)

*October 5, 2012*

**Business Math**

7. By using the table in the handbook, the present value of $12,000 for six years compounded at 6 percent semiannually is:

*October 4, 2012*

**Math**

Cost of 1m shirt material=Rs50 Cost of 1m trouser material=Rs90 Let Has an buys shirt material =3x Hasan buys trouser material =2x Cost of shirt material cloth=Rs50Ã—3x=150x Cost of trouser material cloth =Rs90 Ã—2x=150x S.P. of shirt material =C.P.&...

*September 15, 2012*

**Chemistry**

A reaction has a standard free-energy change of -11.80 kJ/mol (-2.820 kcal/mol). Calculate the equilibrium constant for the reaction at 25 degrees C. Please help!

*November 9, 2011*

**2nd grade math homework**

does the broken key 5 means not to use the number5

*September 27, 2011*

**math**

show25 broken key is 5 show in 3 ways

*September 27, 2011*

**math**

please help with daughters homework show 25 broken key is 5 show in 3 ways

*September 27, 2011*

**English**

how does the The character in “My Mother” feel?

*June 1, 2011*

**sentence skills**

but

*May 26, 2011*

**Math**

Rebate 12000 Discount 2.4

*February 27, 2011*

**Physics**

what is calculus

*October 24, 2010*

**math**

The volume of a cone is three hundred cubic kilometers. If the radius of the base is 9 kilometers, what is the height of the cone? Use three point one four for pi. Show your work and round to the nearest tenth.

*August 27, 2010*

**chemistry**

Calculate the wavelength (in nanometers) of a photon emitted by a hydrogen atom when its electron drops from the n = 4 state to the n = 3 state.

*March 23, 2010*

**english**

what is a good thesis statement for jim crow laws?

*March 11, 2010*

**chemistry 106**

Methanol, ethanol, and n-propanol are three common alcohols. When 1.00 g of each of these alcohols is burned in air, heat is liberated. Calculate the heats of combustion of these alcohols in kJ/mol. (a) methanol (CH3OH), -22.6 kJ (b) ethanol (C2H5OH), -29.7 kJ (c) n-propanol (...

*March 3, 2010*

**chemistry 106**

A 0.1589 g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter contains exactly 251 g of water, and the temperature increases by 1.126°C. Calculate the heat given off by the burning Mg, in kJ/g and in kJ/mol.

*March 3, 2010*

**chemistry 106**

Calculate the work done if a gas is compressed from 8.3 L to 3.3 L at constant temperature by a constant pressure of 3.0 atm, and give your answer in units of joules. (1 L · atm = 101.3 J)

*March 3, 2010*

**chemistry 106**

The first step in the industrial recovery of zinc from the zinc sulfide ore is roasting, that is, the conversion of ZnS to ZnO by heating. 2 ZnS(s) + 3 O2(g) → 2 ZnO(s) + 2 SO2(g) ΔH = -879 kJ/mol Calculate the heat evolved (in kJ) per gram of ZnS roasted.

*March 3, 2010*

**chemistry 106**

Determine the amount of heat (in kJ) given off when 2.23 multiplied by 104 g of ammonia are produced according to the following equation. Assume that the reaction takes place under standard-state conditions at 25.0°C. N2(g) + 3 H2(g) 2 NH3(g) ΔH°rxn = -92.6 kJ

*March 3, 2010*

**chemistry 106**

Which of the following standard enthalpy of formation values are not zero at 25°C? (Select all that apply.) H2(g) N2(g) Au(s) Be(s) H20(g) Ne(g)

*March 3, 2010*

**math**

what is -.ooo552 in scientific notation

*March 1, 2010*

**chemistry 106**

Dry air near sea level has the following composition by volume: N2, 78.08 percent; O2, 20.94 percent; Ar, 0.93 percent; CO2, 0.05 percent. The atmospheric pressure is 1.00 atm. (Hint: Since volume is proportional to the number of moles present, mole fractions of gases can be ...

*March 1, 2010*

**chemistry 106**

Nitroglycerin, an explosive compound, decomposes according to the equation below. 4 C3H5(NO3)3(s) 12 CO2(g) + 10 H2O(g) + 6 N2(g) + O2(g) Calculate the total volume of gases when collected at 1.2 atm and 25°C from 1.3 multiplied by 102 g of nitroglycerin. What are the ...

*February 28, 2010*

**chemistry 106**

calculate the pressure exerted by 1.00 moles of CO2 confined in a volume of 5.00 L at 450. K. Compare the pressure with that predicted by the ideal gas equation.

*February 28, 2010*

**chemistry 106**

A gas-filled balloon having a volume of 1.50 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°C and 3.00 multiplied by 10-3 atm, respectively. Calculate the final volume of...

*February 28, 2010*

**chemistry 106**

The pressure of 6.0 L of an ideal gas in a flexible container is decreased to one-half of its original pressure, and its absolute temperature is decreased to one-seventh of the original. What is the final volume of the gas?

*February 28, 2010*

**Geometry**

a right triangle has legs of 24 units and 18 units. the lenght of the hypotenuse is?

*January 22, 2010*

**Introduction Enngineering**

i need bad help

*November 3, 2009*

**Science**

what are the 6 rules to draw atoms?

*September 30, 2009*

**ALGEBRA 1**

2/3+y=3/4 please show your work

*September 17, 2009*

**ALGEBRA 1**

2/3+y=3/4

*September 17, 2009*

**Algebra 1**

nika did you just copy the answer? thnx Ms. Sue

*September 17, 2009*

**Algebra 1**

solve this equation. show ur wrk work plz. 8y-(2y-3)=9

*September 17, 2009*

**Language Arts**

thnx!

*September 17, 2009*

**Language Arts**

what is free verse poetry? What are all of the examples of poetry?

*September 17, 2009*

**Social Studies**

its not opening up

*September 15, 2009*

**Social Studies**

What role did religious freedom play in the founding of Rhode Island and Pennslyvania?

*September 15, 2009*

**Language Arts**

what is an antonym for rationalize?

*September 8, 2009*

**Us History**

thnx!!

*September 6, 2009*

**Us History**

why were europeans interested in asia?

*September 6, 2009*

**World History**

which country had more than a dozen colonies in what is now the U.S along the atlantic coast by the mid-1700s? a.holland b.britain c.spain or d.france

*May 31, 2009*

**Intro to physical science**

I need a relating topic to physical science that is relating to the reasl world?

*May 30, 2009*

**math- pre algebra**

thnx

*May 25, 2009*

**math- pre algebra**

can you help me with this equation and may you please show your work? -3=3-y

*May 25, 2009*

**Technology**

Is a cellphone an electrical appliance

*May 17, 2009*

**maTH**

ok Ms.Sue may you help me?

*April 30, 2009*

**PRE*******ALGEBRA**

WRITE A FUNCTION RULE TO DESCRIBE EACH SITUATION. PLEASE HELP I DO NOT UNDERSTAND THIS AT ALL. The number of pounds p(z)as a function of the number of ounces z. The selling price s(c)after a 45% markup of an item as a function of the stores' cost c. The total number of ...

*April 30, 2009*

**math**

The medians are 33 and 36 then you add 33 and 36 and divide the solution of the numbers by 2 and you should get 34.5 or 34 1/2.

*April 30, 2009*

**Pre Algebra Math**

How to write a rule for a linear function?

*April 30, 2009*

**Science**

Why do astronomers need to use special methods to detect star systems?

*April 29, 2009*

**math pre algebra**

thank you very much Bob!!

*April 29, 2009*

**math pre algebra**

what is the slope of y=5x-6 and y=7/2x +5 ?

*April 29, 2009*

**Pre Algebra**

what is the slope of y=5x - 6 and y= 7/2x + 5 ?

*April 29, 2009*

**Pre Algebra**

5x-y=6 what is the equation in slope intercept form?

*April 29, 2009*

**algebra 2**

thats part of algebra 2 that's easy were doing that now in pre algebra

*April 29, 2009*

**Social Studies**

Why are foreign investors hesitant to invest in many countries in East Africa?

*April 28, 2009*

**science**

this isnt me i never asked this question

*April 28, 2009*

**science**

explain how trees affect the water cycles including deforesting

*April 28, 2009*

**Social Studies**

what are the main resources of Sudan in East Africa?

*April 21, 2009*

**Social Studies**

thanks!!

*April 21, 2009*

**Social Studies**

nothing i donteven know what unrest means.

*April 21, 2009*

**Social Studies**

How has unrest hurt Rwanda and some other East African countries?

*April 21, 2009*

**Social Studies**

I think irrigation might make a region's land and soil more fertile and suitable for farming.

*April 21, 2009*

**Social Studies**

How might irrigation help a region's economic development?

*April 21, 2009*

**Science**

If a planet had a surface with craters but no other features, what could I say about the inside of the planet?

*April 14, 2009*

**social studies**

Where is the eastern rift located? Where is the western rift located?

*April 14, 2009*

**Math Pre Algebra**

for the second one do i do 1348(0.0025)(1.5)= 5

*April 14, 2009*

**Math Pre Algebra**

oh ok thank you

*April 14, 2009*

**Math Pre Algebra**

so the answer or the first one is 135 and im not supposed to add 900 to 135?

*April 14, 2009*

**Math Pre Algebra**

Find the simple interest. $900 deposited at an interest rate of 3% for 5 years. $1,348 deposited at an interest rate of 2.5% for 18 months.

*April 14, 2009*

**Science**

I have two questions. How can an atmosphere affect the temperature of a planet's surface? If a planet had a surface with craters but no other features, what could you say about the inside of the planet?

*April 14, 2009*

**Geography**

THANKS ALOT!!!

*April 13, 2009*

**Geography**

How does climate types found in East Africa influence what grows there? Thank You in Advance to whoever helps me!!

*April 13, 2009*

**Math - Pre Algebra**

Thank you soo much!! But can you show me the steps on how to caculate 1280(1.13)^3.

*April 13, 2009*

**Math - Pre Algebra**

$1280 at 13% compound annually for 3 years Use the formula: B= p(1+r)n Please help me I need the answer for tommorow

*April 13, 2009*

**Math - Pre Algebra**

Simple and Compound Interest Find the simple interest. principal= $870 interest rate= 6% time= 9 months Please help me I need the answer for tommorow.

*April 13, 2009*