# suppose a map is scaled so that a half inch represents 25 miles. how many inches of the map represents 87 1/2 miles?

35,906 questions, page 183-
## science

Juneau, Alaska has a dry winter season, even though it receives 53.2 inches of precipitation annually. Its average coolest-month temperature is 22'F, and its average warmest -month temperature is a surprising 56'F. What climate is it?

*asked by pam on August 31, 2010* -
## math

Factor: x^3 - 3/4x - 1/4 The answer is: (x - 1)(x + 1/2)^2 How do I learn to do that? I'd like to reread an appropriate chapter from an appropriate textbook and do practice problems. It takes experience and practiced eye. Algebra books have chapters on

*asked by mathstudent on January 2, 2007* -
## ALGEBRA 1 HELP

Your hole punch makes holes in your that have diameter of 4^-1 inch. a.Write an expression for the area of one punched hole. Use the formula for the area of a circle A=:r^2. (: is pi sign) b.Your hole punch makes three holes in a page . Write an expression

*asked by Louis on December 5, 2013* -
## Algebra

Tim works part-time at a retail store. His salary varies directly by the number of hours worked. Last week he earned $99.45 for 13 hours of work. This week he earned $160.65. a. Write and solve an equation that represents this scenario. b. How many hours

*asked by Willy on February 10, 2014* -
## math

1.What are the mean,median,mode and range of the data set given the altitude of lakes in feet:-9,-36,-23,-8,-17,-52,-27,and-36? 2.Given the data 21,13,13,37,13,23,25,15 a.What is the outlier in the data? b.what is the mean with the outlier? c.what is the

*asked by stupid lame fat on April 9, 2017* -
## Calculus

The rate of growth of the profit (in millions of dollars) from a new technology is approximated by P'(x)=xe^(-x^2) Where x represents time measured in years. The total profit in the thrid year that the new technology is in operation is $10,000. A. Find the

*asked by Liz on December 4, 2006* -
## Calculus

he rate of growth of the profit from an invention is approximated by P'(x)=xe^-x^2, where x represents time measured in years. The total profit in year 1 that the invention is in operation is $15,000. Find the total profit function. I know the answer is

*asked by Tiana on May 2, 2014* -
## algebra

You are going on a camping trip and can carry only 2 gallons, or 8 quarts, of water. After 2 days of hiking, you have used 3 quarts of water. There is an accident, and you find yourself on a ledge where you must wait for someone to find you. You decide to

*asked by rae on June 30, 2016* -
## Computer Science

Q1: Write (militaryTime t AMPM), where t is an integer from 1 to 12 (inclusive) and AMPM is either 0 to represent morning or 1 to represent afternoon/evening. The function will convert the hours of the day from standard to military time. (militaryTime 5 0)

*asked by Ronaldo on February 13, 2011* -
## algebra

Coulld someone take the time and check my answers please. 11) without graphing is the system independent, dependent, or inconsistent? y=-x+5 -3x-3y=-15 (my answer; dependent) 12) your club is baking vanilla and chocolate cakes for a bake sale. they need at

*asked by Lee on January 3, 2013* -
## ACCOUNTING

In its financial statements, Trio uses straight-line depreciation with the half-year convention. The book value of the equipment at December 31, 2006, will be: a $29,000. b $35,000. c $31,000. d Some other amount.

*asked by Anonymous on April 4, 2011* -
## Calculus (Cross Section) again

A half of a pepperoni stick is 10 cm long. Assume that a cross section perpendicular to the axis of the pepperoni at a distance x from the end if a circle of radius rad(3x). What is the volume of the pepperoni

*asked by Trinh on November 30, 2014* -
## Chemistry

Iron -59 has a half life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that a new sample of iron? Show all calculations leading to a solution. Can you work the problem? I don't know how to solve for t!!! Please.

*asked by noemi/ on May 11, 2015* -
## Chemistry

The half-life for the second-order reaction of a substance A is 58.2 s when A0 = 0.63 mol L-1 Calculate the time needed for the concentration of A to decrease to the following values. (a) one-third of its original value (b) one-sixth of its original value

*asked by Sara on June 28, 2013* -
## Chemistry

The reaction 2B--->C + 2D is found to be zero order when run at 990 degrees C. If it takes 3.3X110^2 s for an initial concentration of B to go from 0.50 M to .20 M what is the rate constant for the reaction? what is the half life of the reaction under

*asked by Lauren on February 29, 2008* -
## Chemistry

What is the half-life of sodium-24? Explain how you determined your answer. Sodium-24 decays by beta emission. Write a nuclear equation that shows the decay of sodium-24 and its products.

*asked by Help plz....Chloe on May 31, 2013* -
## English

Which of the following lines from the poem "Lines Composed a Few Miles Above Tintern Abbey" is NOT strict blank verse? A. "And passing even into my purer mind" B. "The Landscape with the quiet of the sky" C. "Five years have past; five summers with the

*asked by Justine on August 1, 2016* -
## Chemistry

On March 24, 1989, the Exxon Valdez dumped 10.8 million gallons of oil into the pristine waters of Prince William Sound. If this spill had happened in open water, how many square miles of ocean would be covered by an oil slick that is 0.5 mm thick?

*asked by Michelle on April 18, 2009* -
## Math

1) Which sum best represents the model shown below? There are 3 blue blocks, and each of them separately equal x^2. There are 2 green blocks that each separately equal x. There are 2 red blocks that each separately equal -1. And there is 1 yellow block

*asked by sasha on April 29, 2015* -
## Algebra

The functions f(x) and g(x) are described below: f(x) = 32x + 8 g(x) = 32x − 9 The graph of g(x) is obtained by shifting down the graph of f(x) by _____ units. Numerical Answers Expected! Answer for Blank 1: „ð Question 11 (Multiple Choice Worth 5

*asked by Brandon on November 24, 2015* -
## Algrebra II

hi, thanks for reading this I have a question for finding vertical and horizontal asymptotes! as to finding the intercepts, domain, and graphing it all together... like y= 6 over (x+3) I don't quite understand the concepts and things, but if you can give

*asked by Kaz18 Tsuruoka on July 13, 2007* -
## math

On the package of candy coated chocolates it states the box contains 147 grams. In reality, the mass can vary between 145 g and 150 g. You may find between 63 and 69 pieces of candy in any given box. Explain which variable represents the domain and range.

*asked by jordan on December 22, 2015* -
## Math 116

could someone please help me with this question. I have no clue where to start... the line: y = 0.15x + 0.79 represents an estimate of the average cost of gasoline for each year. the line: 0.11x - y = -0.85 estimates the price of gasoline in January each

*asked by Carmen on October 15, 2008* -
## AP macroeconomics

Ok, I have a question. There is a production possibilities frontier graph (it's linear) labeled with 2 products that can be made on the axes for 2 sets of data regarding each person (rancher and farmer.) A point is labeled in the middle of the line of data

*asked by joseph on October 5, 2011* -
## MATH

(A) Classify the following as an example of nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level: zip codes for the state of Pennsylvania (B) Determine if this data is qualitative or quantitative: Nationality

*asked by Jennifer on November 11, 2011* -
## trig

the length of the base of an isosceles triangle is 30.42 inches. each base is 26.54 degrees. find the length of the two equal sides of the triangle to the nearest hundredths. i get 15.19. is that right?

*asked by ALISON on September 6, 2011* -
## Math

Jill's front door is 42" wide and 84" tall. She purchased a circular table that is 96 inches in diameter. Will the table fit through the front door?

*asked by Anonymous on March 24, 2011* -
## math

omar lays down straight tracks for his model railroad. each length of track is 8 inches long. which of the following could be the total length of omar's track?

*asked by emm on January 15, 2013* -
## calculus

the sides of an equilateral triangle are increasing at a rate of 27 in/sec. how fast is the triangles area increasing when the sides of the triangle are each 18 inches long?

*asked by Anonymous on October 25, 2010* -
## geometry

A 30-60-90 triangle is inscribed in a circle. The length of the hypotenuse is 12 inches. If a coin is tossed on the figure, what is the probability that the coin will land in the circle, but outside the triangle?

*asked by Piggy on May 10, 2012* -
## Algebra

The diameter of a circular pizza pan is 16 inches. What is the area, to the nearest tenth, of the pan? pi*r2 = area r = diameter/2 201.1 in. squared looks good to me.

*asked by La La Laquandra on March 25, 2007* -
## Math 221*revised*

17 < BMI

*asked by Karen on July 22, 2014* -
## math

jeff has a big scoop of ice cream that is 10 inches tall. it melts by 25%in a minute.whats the height of the ice cream after one minute

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

I'm still needing some help knowing how to work this proportion. A glacier moves about 12 inches every 36 hours. About how far does the glacier move in 1 week? Is it 12 in / 36 hrs = x/week (in hours)

*asked by Kyle on January 29, 2010* -
## math

A classroom is 10 yards long.THE floor is being tiled with new tiles that are each 10 inches long.HOW MANY TILES ARE NEEDED TO MAKE 1 ROW the length of the classroom

*asked by reeree on November 16, 2011* -
## math

jeff has a big scoop of ice cream that is 10 inches tall it melts by 25% in a minute whats the height of the ice cream after one minute

*asked by joey on February 8, 2015* -
## science

mountain bike wheel has diameter of 40 inches , in how many turns will the bike be able to cover 1 km? note : circumference of circle = pi ((radius)^2) radius = diameter/2

*asked by doa'a on February 27, 2015* -
## algebra

An artist framed a rectangular picture. The dimensions of the frame are 4x+3 and 3x+5. He is going to place the picture with the border of 2 inches. Then he wants to paint the border. What is the area he has to paint?

*asked by Alex on February 17, 2015* -
## geometry

Triangle PEA has a 20-degree angle at P and a 120-degree angle at E, and the length of side EA is 6 inches. Find the lengths of the other two sides of this triangle.

*asked by Beatrice on April 12, 2010* -
## geometry

A 30-60-90 triangle is inscribed in a circle. The length of the hypotenuse is 12 inches. If a coin is tossed on the figure, what is the probability that the coin will land in the circle, but outside the triangle?

*asked by Piggy on May 8, 2012* -
## Earth Science

If atmospheric pressure is 30.40 inches of mercury, what is the air pressure in millibars? (1)1016 mb (2)1028.3 mb (3)1029 mb (4)1029.5 mb I think that the answer is either 2 or 4, could you check my answer?

*asked by KaiCaster on December 9, 2015* -
## Algebra I

volume of a basketball is 448.9 cubic inches. with the formula V=4/3(pie)radius(cubed) for the volume of the ball, find the radius of the basketball

*asked by Aaron on January 20, 2014* -
## math

so if a trapezoid has 4 sides and the top(short) side and the two not parallel sides are all 5 inches long, what are possible lengths for the long (bottom) side? and are there more than 1 possible solution?

*asked by anna on March 22, 2016* -
## Math

a book cover has the length and width (in inches). top 31-b, bottom 2+a+2b,sides 3a - b and 2+a+2b,find the values of a and b? Find the perimeter of the book cover.

*asked by Joanne on April 10, 2017* -
## college sttistics

I have read all my material regarding how to try and figure out how to use Chebyshev Theorem. I even email my teacher and to no avail, I need your help in how to work this problem out step by step. A nationwide test taken by high school sophomores and

*asked by Mary on September 8, 2008* -
## science

The basketball team needs to score at least 420 points this season to set a new school record. So far it has scored 82 points. Which inequality represents the number of points that need to be scored to set a record?

*asked by kid on December 13, 2018* -
## Algerbra

imagine you are at a gas station filling your tank with gas. the function c(g) represents the cost c of filling the gas tank with g gallons. given the equation c(g)=3.03(g) A. what does the number 3.03 represent B.find c(2) C.Find C(9)

*asked by Anonymous on April 11, 2010* -
## Pre Algebra

During a sale, the regular price of a CD was reduced by $3. Let p represent the regular price of the CD. Write an algebraic expression that represents the sale price. Having trouble with this one, don't quite understand how to write it as an equation

*asked by Julio on September 3, 2017* -
## psychology

View the results for a hypothetical psychology test psychology test. Then, create a report with the following: The mean score for each question. The mean score for the entire test. A graph that represents the scores for each question.

*asked by p on January 22, 2012* -
## Math

You are packing books into a box. The box can hold at most 10 books. The function y=5.2x represents the weight y (in pounds) of x books. a. Is 52 in the range? Explain. b. Is 15 in the domain? Explain. C. Is the domain discrete or continuous?

*asked by Murat on February 3, 2018* -
## algebra

Cindy put 1and 2 thirds cups of peanuts and 1 and 3/5 cups of popcorn into a bag what's the expression represents the total number of cups of peanuts and popcorn Cindy took to camp

*asked by Tina on February 13, 2017* -
## Math

A store is having a sale during which all outdoor front of her is 45% off The original price, p. if the post sale price of an outdoor furniture set can be calculated using the expression p-0.45p, which expression also represents the price?

*asked by Kyle on February 7, 2019* -
## Math

Four friends went to see a movie. Each ticket cost $x. The table shows the prices of several items at the theater. They bought four large pretzels and four bottles of water. Write and simplify an expression that represents the total cost of tickets and

*asked by Anonymous on December 8, 2013* -
## Math

A store advertises that all sports equipment is 30% off the retail price. In addition, the store asks customers to select and pop a balloon to receive a coupon for an additional n percent off the already marked down price of one of their purchases. Write

*asked by Vanesa on January 28, 2014* -
## Math

A store advertises that all sports equipment is 30% off the retail price. In addition, the store asks customers to select and pop a balloon to receive a coupon for an additional n percent off the already marked down price of one of their purchases. Write

*asked by Vanesa on January 28, 2014* -
## chemistry

If the standard state of sufur is S8 (s), which of the following equations represents the standard enthalpy of formation of H2SO4 (ℓ) ? A. 2H (g) + S (g) + 4 O (g) H2SO4 (ℓ) B. H2 (g) + S8 (g) + 2 O2 (g) H2SO4(ℓ) C. H2SO4 (ℓ) H2 (g) +

*asked by Ninaya on October 2, 2011* -
## Chemistry

If the standard state of sufur is S8 (s), which of the following equations represents the standard enthalpy of formation of H2SO4 (ℓ) ? A. 2H (g) + S (g) + 4 O (g) H2SO4 (ℓ) B. H2 (g) + S8 (g) + 2 O2 (g) H2SO4(ℓ) C. H2SO4 (ℓ) H2 (g) +

*asked by Hannah on October 2, 2011* -
## college algebra

Mitsuko salary for next year is $44490. This represents a 7% increase over this year's salary. Find mitsuko present salary.

*asked by Chenita on March 3, 2014* -
## algebra 1

Thelma wants to find the equation of a line that passes through the point (2, 2) and is perpendicular to the line Which equation best represents Thelma's equation?

*asked by shay on April 29, 2013* -
## Science

Hello, I just started my chem class today and I am totally stuck on this question: Hurriance Katrina had the 2nd lowest ever recorded barometric pressure at 0.920 mb. Convert this pressure to units of… a. atmospheres. b. Inches of Hg. I know i need to

*asked by Elizabeth on September 2, 2015* -
## statistics

21. Payne (2001) gave participants a computerized task in which they first see a face and then a picture of either a gun or a tool. The task was to press one button if it was a tool and a different one if it was a gun. Unknown to the participants while

*asked by bren on December 8, 2009* -
## optimal dimensions

Applications of derivatives You are planning to make an open rectangular box from an 8 by 15 inch piece of cardboard by cutting congruent squares from the corners and folding up the sides. what are the dimensions of the box of largest volume you can make

*asked by Jen on November 18, 2006* -
## Math

What is the dollar amount for the cement needed for a sidewald that is 4 inches thick, 3 feet wilde, and 40 feet long if the cement is sold for $76 petr cubic yard. Calculate the problem using fractions to avoid rounding errors caused by repeating

*asked by Alice on May 6, 2013* -
## Math

A toy company has increased their size of one of their dolls. The packaging department has calculated that they need to add 3 inches to each of the dimension of the original packaging (Original height=10 in width=2.75 length=5). What is the new amount of

*asked by Ashley on April 20, 2015* -
## Physics

Michael Jordan has the record for the highest vertical jump at 48 inches (1.22m). While on the ground, he speeds up over a distance of 0.6 m to achieve the necessary launch speed. What acceleration does his legs provide in order to achieve his height?

*asked by Joseph on October 19, 2015* -
## Micro economics

Consider a firm with the following production function: q = (ak+bl)^(1/2) The firm's total costs can be written as C = F + rk + wl 1. Calculate the firm's contingent factor demand. Illustrate it in a graph including the firm's isoquant map 2. Assume that

*asked by Rasmus on April 8, 2014* -
## physics

An archer shoots a 54.6 g arrow horizontally at a target 14.0 m away. The arrow is 18.0 inches long. The 54.6 g arrow is aimed directly at the center of the target, but it hits 60.0 cm lower. What was the initial speed of the arrow? (Neglect air

*asked by Riley on September 5, 2013* -
## Math

Assume the mean height of the soldiers to be 68.22 inches with the variance of 10.8inches square. How many soldiers in the regiment of 1000 would you expect to be-(1.) Over 6 fee tall (2) below 5.5 feet? Assume height to be normally distributed. Given;

*asked by Tshering on December 3, 2018* -
## Hydrology

I have no idea how to calculate this, I just need some direction please (like an equation)? Consider a drainage basin 187 km2. How much water is produced (m3) if 2.5 inches of rain falls on the basin? How many people could be supported on the water

*asked by Shelly on January 28, 2015* -
## Chem Help!!

A standard 1.000kg- mass is to be cut from a bar of steel having an equilateral triangular cross section with sides equal to 3.00in. The density of the steel is 7.70g/cm^3. How many inches long must the section of bar be?

*asked by Lisa on February 2, 2013* -
## math

Each time Lucy uses her credit card she earns points from the credit card company. For every 100 dollars she spends she earns 50 points. Choose the equation that accurately represents the relationship between the two variables: m = amount of money spent,

*asked by weed on October 13, 2014* -
## finance (saving for $1,000,000)

At age 5, how much would you have to save per month to have $1 million in your account at age 65, if your investment rate was 10% per year? Assume no taxes and compounding on a monthly basis. I use my TI-83..... N=(65-5)*12 I%=10%/12 PV=0 PMT=0

*asked by Jason on July 25, 2008* -
## Chemistry

Okay, I feel like this question should be really easy because it's a multiple choice question but how do you figure it out?? I'm completely drawing a blank. Consider the following equilibrium N2O4(g) 2NO2(g) Kc = 4.8E-3 Which set of concentrations

*asked by a Canadian on April 9, 2013* -
## Precalc Repost

Hello, I'm trying to figure out how to do this problem, but don't know where to begin. I think some information is missing. Blood Pressure: The function P=120+30Sin 2pi(t) models the blood pressure (in millimeters of mercury) for a person who has a high

*asked by Phillip on March 7, 2010* -
## pre-calc

Hello, I'm trying to figure out how to do this problem, but don't know where to begin. I think some information is missing. Blood Pressure: The function P=120+30Sin 2pi(t) models the blood pressure (in millimeters of mercury) for a person who has a high

*asked by Phillip on March 7, 2010* -
## statistics

1. The scores on a standardized test for high school students are normally distributed with a population mean of 500 and a population standard deviation of 100. Use the empirical rule (0LI refers to this as the standard deviation rule.). Make sure you

*asked by lay on February 3, 2013* -
## english

I am suppose to create a thesis for my research paper. Then I am suppose list three to five sub-claims I will use to support my thesis. I have done all of this just want an opinion on if I am on the right track or not. Thesis: Operation Market Garden was a

*asked by lisa on July 18, 2006* -
## calculus

They're actaully 2 question :D 1.find the rate of change of the distance between the orgin and a moving point on the graph of y=x^2+1 if dx/dt=2 centimeters per second when x=1. 2.A triangular trough is 12 feet long and 3 feet across the top. it ends are

*asked by Yoona on November 30, 2011* -
## Socials

What was an added bonus of these Europeans conducting trading in Canada? Describe the achievements of either Fraser or Thompson. How did Cook and Vancouver contribute to the history of BC? An added bonus of these Europeans conducting trading in Canada was

*asked by Sara on January 20, 2010* -
## Chemistry - acid base

What volume of 10.0 M NaOH is needed to prepare a buffer with a pH of 7.79 using 31.52 g of TrisHCl? ( Tris. At 25 ∘C, Tris has a pKb of 5.91 ) a) The buffer from Part A is diluted to 1.00 L. To half of it (500. mL), you add 0.0250 mol of hydrogen ions

*asked by K on March 9, 2018* -
## Math

Working three days per week, a clerk earns $255 per week. At the same rate of pay , which expression below represents what she would earn if she worked 5 days per week? ( let x represent full time earnings) 1. X= 3/5 (255) 2. X= 5/3(255). 3. X= 3(255). 4.

*asked by Bear on May 4, 2017* -
## Physics

There are two pieces of plastic, a full ring (like this: 0 ) and a half ring (like this: ( . They have the same radius and charge density. Which electric field at the center has the greater magnitude? Defend your answer. I want to say that the magnitudes

*asked by Taylor on September 14, 2009* -
## Chemistry

The half-life for radioactive decay of 14C is 5730 years (it emits β-particles with energy of 0.16 MeV). An archaeological sample contained wood that had only 72% of the 14C found in living trees. What is its age?

*asked by Zoa on April 8, 2010* -
## Chemistry

Zn(s)+2H+(aq)->Zn2+(aq)+H2(g) Br2(aq)+2I-(aq)->2Br-(aq)+I2(aq) Name one compound containing H+ ions and another containing I- ions, which would be suitable for these reactions. Ezplain why zinc is said to be oxidised in its reaction. Complete the half

*asked by Anonymous on January 17, 2008* -
## MATH- APR of a loan

The owner of an automobile repair center purchased new electronic diagnostic equipment for $12,000. He paid down and then paid 60 monthly payments of $242.81. Determine the APR of the loan to the nearest one-half of a percent.

*asked by Amanda on April 8, 2018* -
## social studies

Where can I find a good, reliable source on the internet about the Bermuda Triangle? I would like a PDF with at least a few pages and I specifically am looking for scientific explanations. Sites that end with edu or gov would be great. I have been

*asked by Ray on December 3, 2013* -
## exponential equations

If a brand new Nissan Frontier pickup truck has a current value of $22 500 off the lot, calculate how long, t, it will take to depreciate to half of it’s current value. This particular model has a depreciation rate of 23%. Give answer to 2 decimal

*asked by Anonymous on March 29, 2015* -
## physics

A car accelerates from rest at 1.0 m/s^2 for 20s along a straight roa, it then moves at a constant speed for half an hour, it then deccelerates uniformly to a stop in 30s. Find the total distance covered by the car.

*asked by sophia on July 26, 2016* -
## Math Algebra

5. At the half-time show, a marching band marched in formation. The lead drummer started at a point with coordinates (–4, –7) and moved 4 steps up and 2 steps left. a. Write a rule to describe the translation. I think it is (x,y)-->(x+2,y+4)is this

*asked by Deborah on December 16, 2012* -
## Analytical Chemistry

Indicate whether the following half-cells would act as an anode or a cathode when coupled with a S.H.E. in a galvanic cell. Calculate cell potential: Pt/O2(800 torr)/HCl(2.5E-5 M) I have not figured out a way to approach this problem. I know the nernst

*asked by Steve on March 21, 2015* -
## Physics

A motor boat is traveling at a speed of 2.4 m/s shuts off its engine at t=0. How far does it travel before coming to a rest if it is noted that after 3 seconds its speed has dropped to half of its original value? Assume that the drag force of the water is

*asked by Anonymous on March 22, 2015* -
## Chemistry

A potassium hydroxide solution has a pH of 12.90. Enough cid is added to react with half of the OH- ions present. What is the pH of the resulting solution? Assume that the products of the neutralization have no effect on pH and that the amount of

*asked by Alexa on May 4, 2010* -
## Physics

A motor boat is traveling at a speed of 2.4 m/s shuts off its engine at t=0. How far does it travel before coming to a rest if it is noted that after 3 seconds its speed has dropped to half of its original value? Assume that the drag force of the water is

*asked by Anonymous on March 21, 2015* -
## middle madness

My word problem after receiving her paycheck, Shane gave $15 to her brother and bought a sweatshirt for $`8. Sh put half of the remaining money into her savings account. If she $46 eft, what was the amount of her paycheck. Answer $107

*asked by tangela on May 27, 2013* -
## Physical Science

Your glass half full travels across the table at initial speed vi = 2.6 m/sec. Glass and water together add up to a mass of m = 0.22 kg. The underside is wet, so kind of slippery, with frictional force f = 0.29 N retarding the motion.

*asked by Cameron Rivera on September 27, 2018* -
## Second order half life

At 100 degrees C , a certain substance undergoes second-order decomposition with a half-life of 26 minutes. If the initial concentration of the substance is 3.9×10−2M , what is the value of the rate constant at 100degrees C? So I put in (1560seconds)

*asked by Sar on September 21, 2010* -
## physics

You are driving through town at 14 m/s when suddenly a car backs out of a driveway in front of you. You apply the brakes and begin decelerating at 3.3 m/s2.How much time does it take to stop? After braking half the time found in part A, is your speed 7.0

*asked by ana22 on February 6, 2017* -
## Chemistry

The given reaction, 2N2O5 4NO2 + O2, follows first-order kinetics and has an activation energy of 103 kJ mol-1. At 298 K, k = 0.0000354 s-1. What is the half-life (min) for this reaction at 338 K ? Round your answer to 3 significant figures.

*asked by Kyo on November 11, 2010* -
## History

Hey, I need to Stretch this Question into about Half a Page, Now .. , Any answers on this Question, To either help me get my Report done, Or someone to actually do it for me would be appreciated. Q. The Twenty first century, Will never see the Rise of an

*asked by Anonymous on August 3, 2008* -
## chemistry

Zn(s)+2H+(aq)->Zn2+(aq)+H2(g) Br2(aq)+2I-(aq)->2Br-(aq)+I2(aq) Name one compound containing H+ ions and another containing I- ions, which would be suitable for these reactions. Ezplain why zinc is said to be oxidised in its reaction. Complete the half

*asked by Anonymous on January 17, 2008*

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**183**- 184
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