Friday

April 18, 2014

April 18, 2014

Total # Posts: 483

**Calc**

find F''(pi/3) f(x)= 4cos(x/2) i got -cos(pi/6) but i don't think that's the correct answer... Thanks!

**math**

What is the differnece in meaning between the notstions of a line over QR and not a line over QR?

**math**

What is the differnece in meaning between the notstions of a line over QR and not a line over QR?

**chemistry**

what does 9.54e-7+7.25e-4 equal?

**Chemistry**

Estimate the value of the equilibrium constant for the dissolution of LiF(s) in a strong acid

**Chemistry**

To 0.360 L of 0.140 M NH3 is added 0.150 L of 0.100 M MgOH2. How many grams of (NH4)2SO4 should be present to prevent precipitation of Mg(OH)2 (s)? THANK YOU!!!

**Chemistry**

Find the [OH-] of .196 M NaOH and .262 M NH4Cl

**Chem**

So do you add the 6.6E-3 and 1E-2 together as the value for Ba^2+?

**Chem**

6.6×10−3 M Ba(OH)2 and 1.00×10−2 M BaCl2 what is [OH-] of solution?

**chemistry**

Molybdenum (Mo) has a density of 10.22 g/cm3 and it crystalizes into a fcc unit cell, calculate the radius of a (Mo) atom?

**world issuse**

LUGGAGE

**Chemistry**

the concentration of HCl, a strong acid is 0.500 M. if 20.0 ml HCl is needed to titrate 40.0 ml of NaOH, what is the concentration of NaOH I don't understand how to do this. Can I see a step by step way of how to do this please

**Math**

Order of operstions

**Math**

-6 5/6 + 2 1/3

**chem**

What is being oxidized in each of the following reactions? (a) Sr(s) + F2(g) SrF2(s) F2 SrF2 Sr .(b) H2(g) + I2(g) 2 HI(g) H2 HI I2 .(c) 2 Li(s) + Pb2+(aq) 2 Li+(aq) + Pb(s) Pb2+ Li+ Pb Li thanks:) can you give an explanation. I know a is Sr but I don't get why. If it does...

**chemistry**

what solution of sugar in water has the highest molarity?

**chemistry**

what is the molarity of a solution containing 23g of NaCl in 500 mL of solution? (the molecular mass of NaCl is 58.44.)

**chemistry**

if you have 2 mol of glucose in 4L of solution, what is the molarity of the solution?

**chemistry**

if you have 100 ml each of 1.0 m solutions of NaCl,KCl, and CaCl2 which solution would have the largest mass? explain..

**LIfe orientation**

i think many communities will encounter due to substance of abuse

**Accounting**

If Grant House Furnishing accepted a ten month 8% interest rate, $3000 note from one of its customers on april 1, 2008. How much interest will Grant House Furnishing accrue for the month of April?

**Chem**

Thanks

**Chem**

An ethylene glycol solution contains 20.9 g of ethylene glycol (C2H6O2) in 85.0 mL of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water.) freezing point °C boiling point °C How would I set this up? thanks

**english**

what is the tone and diction in the poem Tableau by countee cullen

**Math**

In how many ways can two dice be rolled to yield a sum divisible by 3?

**history**

How is the New Deal a conservative defense of capitalism?

**history**

"Rather than a radical departure from capitalism, the New Deal was a conservative defense of capitalism." Assess the validity of this statement.

**history**

What is Johnson’s thesis regarding Sam, the Market Revolution, and antebellum American society in the book Sam Patch?

**history**

For whom and to what extent was the American West a land of opportunity from 1865 to 1890?

**Algebra II**

What does it mean when the domain of a function is (-‡,‡)? What about a range of,say, (2,‡)? (In case it doesn't come out right, that symbol is the infinity symbol).

**Chemistry**

20.2 mL of 0.234 M FeCl3 is added to 42.5 mL of 0.453 M NaOH. Iron(III) hydroxide precipitates. NaCl remains in aqueous solution. 1) What mass (in g) of Fe(OH)3 should precipitate (assuming 100% yield)? 2) How many moles of the excess reactant remain after the reaction is comp...

**math**

if i invested $1000.00 at 5% per year for the next 20years how much will i have

**math**

you invest 1000$ at an annual growth intrest rate of 5%.how much money will your investment be worth in 20years?

**math**

Maratha paid $42.40 for her sisters birthday present. this included 6% sales tax. What was the cost of the gift before tax?

**math **

64.675 = 64.68

**math **

video games are on sale for 35% off. if a particular game regulary sells for $99.50 what is the sale price

**math**

25%

**math**

find the percent of decrease from 280 to 210. round to the nearest tenth of percent if necessary

**math**

In a survey, 480 people or 75% said they attened a movie at least a month. how many people were surveyed? i dont get how to find the answer

**math**

Bob makes 5.5% commision selling eletronics. How much commission dose she make if she sells a flat-screen TV for %10,000? how would i solve this?

**math correct or not?**

1. 19 is what percent of 40 a. 19=n x 40;47.5% b. 40=19 x n;2.1% c. 40=19 x n;40.4% d. 19=n x 40;52.3% is it a? 2.64 is 80% of what? a.64 x n=80; 0.8 b.0.64 x n=80; 125 c.60= 0.80 x n;80 d.80=64 x n;1.3 is it c?

**math**

so 14.3%?

**math**

1/7 as a percent?

**math**

What is 35% of 63? a. n x 0.35 = 63;180 b. n= 35 x 0.63; 22.05 c. n= 35 x 63; 2,205 d. n= 0.35 x 63; 22.05 i thought it was b or d?

**math**

Two us states are not part of the contential us. What percent of the fiffty us states are included in the contential state? A.2% B 13% C.48% D 96% is it D?

**math**

9.9/6 = x/16 or how would i writea proportion for that?

**math**

i dont know its confuses me

**math**

At the store, 6 pencils sell for $.99. At this rate what is the cost of 16 pencils?

**math**

Write a proportion that can be used to find the cost of 10 notebooks if 3 notebooks cost $1.98

**Maths**

help me in math trish

**math**

The sale price of a coat is 40% off it's regualr price of $59.50. Which equation can be used to find s, the sale price of the coat? A. S= 59.50 - 59.50(0.40) B. S = 59.50 + 59.50(0.40) C. S= 59.50 - 59 50(0.60) D. S=59.50 + 59.50(0.60)

**math**

Write a proportiom to describe the situation the solve. Three cans of dogs food sell for 99 cents. Fine the cost of 15 cnas

**math**

find the unit rate.

**math**

A car travels 84 mi on 3 gal of gas how would I do this?

**math**

$230 would I have to put it in like proportion to like show my work?

**math**

how do I do it?

**math**

Loretta bought a new computer for $1849 a new printer for $159 and a new software for $289 incudeing tax. She plans to make equal payments of 10% of the total amount. What is a resonable amount for each payment? A. $20 B.$23 C.$23 D.$2100

**math**

A recipe calls for 6 1/2 cups of flour. You have 4 3/4 cupa. How much more flour do you need?

**math**

0.4245

**math**

Regular price: $8.49 percent ot discount 5%

**math**

percent*

**math**

percent*

**math**

Find the selling price Cost: $6 percebr of markup: 50%

**math**

selling*

**math**

how would I find the spelling cost?

**math**

Find the selling price. Cost: $6 percent of markup: 75% would the answer be $4.50 selling price?

**math**

1. Find the markup cost:$18 percent of markup: 35%

**math**

The population of Alaska was about 128,535. That was about 20.5% about how many people lived there? how would the proportion go? 20.5/100 = x/128535 or 20.5/100 = 128535/x?

**Math**

Mimi was 36 inches tall two years ago. If she is 17% taller this year, how tall is she. Round your answer to the nearest inch.

**math**

x/ 2 cm = 5 1/4 m/3 m

**math**

26% increase

**math**

from 87 to 108 would the answer be 26% decrease?

**math**

from 27 to 72 would the answer be 166.66666 = 166.7 increased?

**math**

would it be 18.8%

**math**

ok so how would I put it in a porportion and solve it?

**math**

Increase goes up and decrease goes down.

**math**

I think so. Wouldn't the answer be decreased?

**math**

it saysFind each percent of change. tell weather the change is an increase or decrease. Where necessary round to the nearest tenth of percent.

**math**

from 80 to 95 would it be 18.75 or negative 18.75??

**math**

wouldn't it be 26.1?

**math**

I thought I had to multiply 1.7 times 100 the divide that by 6.5

**math**

yes

**math**

from 6.5 to 4.8

**math**

A computer that cost $1,099 last year cost $999 this year. Would it be about 9 or 9.1?

**math**

I don't get it.

**math**

A computer that cost $1099 last year costs $9999 this yeat would it be 1099 from 9999 ?% of 1099 is 9999 right??

**math**

would it be decresed or increased from 96 to 78 n% or 96 is 18 how can I tell?

**math**

would it be decresed or increased from 96 to 78 n% or 96 is 18 how can I tell?

**math**

from 96 to 78 if I rounded to the nearest tenth would it be 18.8?

**math**

from 96 to 78 would the final answer be 18.8 if I rounded to the nearest ten?

**math**

From 77 to 13 would the final answer be 83.1 %?

**math**

how is it negative?

**math**

From 42 to 35 I got that the answer is 16.666666 reapeating. What would my answer be if I rounded to the nearest tenth?

**math**

About 47 years to about 77 years. Find the percent of increase to the nearest percent. would the answer be 64%?

**math**

Find each percent of increase from 48 ro 60 so 25% of 48 is 12 x= 25 % increase?

**math**

Find each percent of increase from 48 ro 60 so 25% of 48 is 12 x= 25 % increase?

**math**

a 6.5 ft tall car standing next to an adult elephant casts a 33.2 ft shadow. If the adult elephant casts a shadow that is 51.5 ft long then how tall is it?

**math**

A 6.5 ft tall car standing next to an adult elephant casts a 33.2 ft shadow. If the adult elephant cast a 33.2 ft shadow that is 51.5 ft long then how tall is it. Would it be 6.5/33.2 = 51.5/x?

**4th grade math**

598.

**math correct or not correct?**

Find the distance between riverside and milton if they are 12 cm apart on a map with a scale of 4 cm : 21 km The final answer is x= 63 km?

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