# 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
1. ## 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
2. ## 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
3. ## 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
4. ## 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
5. ## 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
6. ## 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
7. ## 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
8. ## 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
9. ## 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
10. ## 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
11. ## 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
12. ## 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
13. ## 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
14. ## 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
15. ## 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
16. ## 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
17. ## 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
18. ## 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
19. ## 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
20. ## 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
21. ## 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
22. ## 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
23. ## 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
24. ## 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
25. ## 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
26. ## 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
27. ## 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
28. ## 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
29. ## 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
30. ## 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
31. ## 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
32. ## Math 221*revised*

17 < BMI

asked by Karen on July 22, 2014
33. ## 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
34. ## 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
35. ## 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
36. ## 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
37. ## 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
38. ## 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
39. ## 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
40. ## 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
41. ## 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
42. ## 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
43. ## 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
44. ## 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
45. ## 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
46. ## 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
47. ## 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
48. ## 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
49. ## 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
50. ## 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
51. ## 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
52. ## 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
53. ## 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
54. ## 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
55. ## 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
56. ## 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
57. ## 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
58. ## 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
59. ## 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
60. ## 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
61. ## 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
62. ## 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
63. ## 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
64. ## 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
65. ## 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
66. ## 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
67. ## 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
68. ## 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
69. ## 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
70. ## 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
71. ## 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
72. ## 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
73. ## 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

74. ## 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
75. ## 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
76. ## 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
77. ## 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
78. ## 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
79. ## 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
80. ## 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
81. ## 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
82. ## 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
83. ## 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
84. ## 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
85. ## 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
86. ## 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
87. ## 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
88. ## 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
89. ## 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
90. ## 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
91. ## 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
92. ## 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
93. ## 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

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
95. ## 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
96. ## 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
97. ## 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
98. ## 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
99. ## 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
100. ## 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