1. calculus

Find an interval of length 0.1 in [1, 2] containing a root of the equation. (Enter your answer using interval notation.) x7 + 7x − 10 = 0

2. college algebra

Deshaun is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A has no initial fee but charges .70 cents for every mile driven. Company B charges an initial fee of \$50 and an

3. physics

A projected space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire) as shown in the figure . The circle formed by the tube has a diameter of about 1.1 km. What must be the rotation speed (revolutions per

4. statistics

The director of an alumni association for a university wants to look at the relationship between the number of years since graduation and the amount of monetary contribution an alumnus makes to the university. He collects data on 50 alumni who have made

5. calculus

Suppose f'(x) = xe^-x^2. a) On what interval is f increasing? On what interval is f decreasing? b) Does f have a maximum value? Minimum value? So should I assume that f'(x) > 0 since e has to be a positive number?

6. physical

Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 28.0 in a direction 60.0 west of north. Jane walks 16.0 in a direction 30.0 south of west. They then stop

7. Chemistry

How many moles of Fe3O4 are required to supply enough iron to prepare 0.442 mol Fe2O3?

8. Chemistry

Suppose a runner completes a 10K (10.0 km) road race in 44 minutes and 43 second. What is the runners average speed in miles per hour?

9. CHEM

Aluminum reacts with Chlorine gas to form AlCl3. [2Al(s)+3Cl2(g)=2AlCl3(s)] Given 11.0g of Al and 16.0g Cl2, if you had excess Al, how many moles of AlCl3 could be produced from 16.0g of Cl2?

10. algebra

The length of a rectangle is 9.7cm more than 4 times the width. If the perimeter of the rectangle is 9.1cm what are its dimensions? Could someone please explain, not looking for just answer, needing to know how to do it.

11. Chemistry

What are the products of Ba(NO3)2(aq)+K2CO3(aq)?

12. physic

On an otherwise straight stretch of road near Moffat, Colorado, the road suddenly turns. This bend in the road is a segment of a circle with radius 118 m. Drivers are cautioned to slow down to 45mph as they navigate the curve. you heed the sign and slow to

13. physics

To meet a U.S. Postal Service requirement, employees' footwear must have a coefficient of static friction of 0.5 or more on a specified tile surface. A typical athletic shoe has a coefficient of 0.870. In an emergency, what is the minimum time interval in

14. AP Chemistry

1.A compound consists of 65.45% C, 5.492% H, and 29.06% O on a mass basis and has a molecular mass of 110 g/mol. Determine the molecular formula of the compound. 2. What is the formula weight of iron (II) sulfate? Answer in units of g/mol. 3. What is the %

15. Biochemistry

Acetylcholinesterase catalyzes the hydrolysis of the neurotransmitter acetylcholine: Acetylcholine + H2O  actetate + choline The KM of acetylcholinesterase for its substrate acetylcholine is 9 x 10-5 M. In a reaction mixture containing 5 nanomoles/ml of

16. Statistics

On the daily run of an express bus, the average number of passengers is 48. The standard deviation is 3. Assume the variable is normally distributed. Find the probability that the bus will have Between 36 and 40 passengers

17. math

a man walks 8km north and 5km in a direction east of north.find the distance from the starting point

18. physics

How long does it take the second hand of a clock to move through 4.00 rad?

19. Physics

A certain freely falling object requires 1.50 seconds to travel the las 30.0 meters before it hits th ground. From what height above the ground did it fall?

20. Math SL

An Arithmetic sequence has a tenth term of 17 and a fourteenth term of 30, ind the general term PLEASE HELP!!!!

21. AP chemistry

which of the following aqueous solutions should not form a precipitate with aqueous ba(no3)? 1. KOH 2. K2CO3 3. K2SO4 4. K3PO4

22. Physics

A train consists of 50 cars, each of which has a mass of 7.2 × 103 kg. The train has an acceleration of +7.2 × 10-2 m/s2. Ignore friction and determine the tension in the coupling (a) between the 30th and 31st cars and (b) between the 49th and 50th cars.

23. chemistry

How many moles of aluminum do 5.9×1024 aluminum atoms represent?

24. Chemistry

I've seen the posts on solving this particular equation, and I know the answer is right in front of me. I'm still having trouble understanding why... a 42g piece of ice at 0.0 degrees C is added to a sample of water at 7.8 degrees C. All the ice melts and

25. statistics

In a large class, there were 220 students who wrote both the midterm and the final exam. The standard deviation of the midterm grades was 14, and that of the final exam was 20. The correlation between the grades on the midterm and the final was 0.60. Based

26. math

Find the scale ratio of this map: 1 inch on the map represents 10 miles

27. AP Chem need serious explanation

Calculate the number of moles of carbon atoms present in 1.4 g of ethanol (C2H6O). i get that you calculate the number of moles of ethanol whic i got was .03039 but how do you get the moles of CARBON from that.

28. chemistry

What is the amount of heat involved in each of the following?kilojoules to heat 240 of gold from 20 to 188

29. chemistry

what is the name of the compound C2H4?

30. Biology

Explain the medical importance of brain-mapping experiments?

31. Current Topics in Information Technology

4. Internet has a big impact on firms and their information systems. Firms created new business models that were not possible before the internet. Select one those new business models and answer the following questions: 4.1. What was the original business

32. Chemistry

What are the oxidation states for each element in the equation 3HCl(aq)+HNO3(aq)-> Cl2(g)+NOCl(g)+2H20(l)?

33. maths

The weather forecaster says that it is 200° C in London but only 0.7 as hot in New York. How hot is it in New York?

34. Statistics

The retail price of 12-pack soda can be characterized as having a normal distribution with a mean of 3 dollars and a standard deviation of .25. Below what price do you find 30 % of all 12 packs?

35. physics

a 1.9kg ball of putty moving to the right has a head -on inelastic with 1.3 kg putty ball moving to the left , if the combined blob doens;t move just after the collision, what can you conclude about the relative speeds of the balls before they collide?

36. Math

If a number is added to its reciprocal, the sum is 13/6, find the number.

37. AP chemistry

which of the following aqueous solutions should not form a precipitate with aqueous ba(no3)2?

38. statistics

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by

40. maths

Mr usher is 186.9cm tall and his sister sarah is 147.3cm.What is the difference between them?

41. Calc 3

Use the Chain Rule to find ∂z/∂s and ∂z/∂t. z = tan(u/v), u = 7s + 4t, v = 4s − 7t

42. chemistry

what is name of the compound P2S5? is it phosphorous pentasulfide?

43. science

A running man has half the kinetic energy of that of a boy of half of his mass. The man speed up by 1 m/s so as to have same kinetic energy as that of boy . The original speed of man is ?

44. physics

A truck driver attempting to deliver some furniture travels 5 km east, turns around and travels 5 km west, and then travels 12 km east to his destination. What distance has the driver traveled?

45. Math Ratios

The ratio of the number of marbles Zali had to the number of marbles Muthu had was 3:4. Muthu gave half of his marbles to Zali. What was the new ratio of the number of marbles Zali had to the number of marbles Muthu had?

46. English-Grammar

The interviewer (remained) speechless upon hearing about the senator’s revelations. Is remained a (I think this is the answer) linking verb action verb auxilary verb transitive verb Thanks for the help

47. Physics

A ball traveling horizontally leaves a 0.80 m high table and lands 1.1 meter away. A. Predict the time required for the pool ball to hit the ground. B. What was the initial velocity of the ball?

48. Chemistry

What mass of electrons would be required to just neutralize the charge of 2.5 grams of protons?

49. Language arts

Her many hands reach out to us. Her many tongues are garrulous. These lines make use of A. Aliteration B. onomatopoeia C. Simile D. Personification

50. chemistry

What is the amount of heat involved in each of the following?kilojoules to heat 240 of gold from 20 to 188

51. Physics

A woman stands on a scale in a moving elevator. Her mass is 56.0 kg, and the combined mass of the elevator and scale is an additional 809 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force

52. Physics

The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W=59900 N. The lift force L generated by the rotating blade makes an angle of 21.0° with respect to the vertical. (a) What is the

53. Java

You are to create an efficient OO application to be used by the wait staff at the Mason Inn. You will process one waiter/waitress at a time. The user will provide information for him or her, to include: their name, number of hours worked and hourly wage.

54. English

The (rest) of the inheritance was given to charity. (my answer)noun pronoun adjective preposition Not too sure, it could also be an adjective. Thanks for the help!

55. physics

A box has a mass of 0.215 kg. It is on a very smooth (frictionless) horizontal surface and is acted upon by a force of 2.27 N at an angle of θ = 37.6° with the horizontal. What is the acceleration of the box?

56. phyics

A box of mass 0.385 kg slides down a very smooth (frictionless) ramp which is inclined at an angle of 56.6° above the horizontal. What is the acceleration of the box down the ramp?

57. math

Grossnickle Corporation issued 30-year, noncallable, 8.5% annual coupon bonds at their par value of \$1,000 one year ago. Today, the market interest rate on these bonds is 6.5%. What is the current price of the bonds, given that they now have 29 years to

58. Spanish CHECK

(On the contrary). Flor is describing the courses she is taking, but you have an entirely different point of view. Complete each sentence, using the opposite of the word in italics. ¡OJO! Remember that adjectives must agree in number and gender with the

59. math

It takes the planet Neptune about 164.8 years to revolve once around the sun.What are the least and greatest numbers written in hundredths that could round to 164.8?

60. maths

a ship sails 27km due south then 16km due west. How far is the ship to the nearest 0.1 km ,from its starting point?

61. statistics

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by

62. algebra

A mechanic is working on a car that has a 10 Liter radiator that is currently filled with a mixture of water and antifreeze. thirty percent of the 10 liters is antifreeze and the rest is water. how much needs to be drained and replaced with pure antifreeze

63. Psychological Statistics

Assume that GRE scores approximate a normal curve and have mean of 500 points and a standard deviation of 100. What proportion of the normal curve would correspond to each of the following situations? 1) A score more than 50 points above the mean? 2) A

64. economic

In a free market, which of the following is an accurate statement regarding price? A) Prices tend to increase. B) The price of a good or service helps to quantify its value to consumers. C) None of these statements are accurate. D) Sellers offer misleading

65. Precalculus SOH CAH

how are the following relations true? S(theta + pi/2) = C(theta) and C(theta + pi/2) = -S(theta)?

66. Physics

Dan drops a stone down a well and sees it hit the water 1.2 sec later. A. how deep is the well (no air resistance) B. What is the speed of impact of the stone? c.If Dan drops an elephant down the well how long will it take to hit the water? Explain Thanks

67. English

Sarah trained hard for the competition, but she did (not) win any of the trophies. (not is a(n) my answer)adjective adverb preposition noun

68. health

What physical symptoms often accompany social phobia?

69. mathematics

what is the domain and range of the function F(x)= 1/1-2cosx

70. AP Chemistry

Find mass of liquid water required to absorb 3.94 X e4 of heat energy on boiling. Answer in units of g

71. physics

You pull a 18 kg sled across the floor with a strap that is at an angle of 40° above the horizontal with a force 86 N. Find the magnitude of the acceleration of the sled, given that the coefficient of kinetic friction between the sled and the floor is

72. Calc 3

If z = f(x, y), where x = r^2 + s^2 and y = 8rs, find ∂^2z/(∂r ∂s).

73. physics 101

A person in an elevator is holding a 15 kg block by a cord rated to withstand a tension of 180 N. When the elevator starts up, the cord breaks. What was the magnitude of the minimum acceleration of the elevator?

74. chemistry

How many moles of Fe3O4 are required to supply enough iron to prepare 0.785 mol Fe2O3?

75. Math

A man built a walk of uniform width around a rectangular pool. If the area of the walk is 429 square feet and the dimensions of the pool are 10 feet by 18 feet, how wide is the walk?

76. physics

A box of mass 1.95 kg slides down a frictionless ramp inclined at an angle θ= 42.9 ° at constant speed. The force exerted on the box by the ramp is how many Newtons?

77. chemistry

how many grams of NaOH should be used to make 200 mL of a 0.24M solution starting with a .4M HCL solution

78. math/finance

Assume that you are considering the purchase of a 30-year, noncallable bond with an annual coupon rate of 8.5%. The bond has a face value of \$1,000, and it makes semiannual interest payments. If you require an 7.4% yield to maturity on this investment,

79. Math

Tony's baby sitting service charges \$2.50 per day plus \$1.75 an hour. What is the cost of a seven hour babysitting job?

What are the four functions of management?

81. Calculus

I'm having problems with this one. Can't get the right answer. Differentiate the following using the chain rule. f(x) = squareroot(x^2+1)/(3x+1) I know that I can take the whole thing and put it to the (1/2) and differentiate that then use the quotient

82. precalculus

give an example of two increasing functions whose product is not increasing

83. Math Ratios

A sum of money is shared between Alice, Gayah and Sita in the ratio 3:2:4. If Gayah receives \$4,287.50, how much money do Alice and Sita receive altogether.

84. Math Ratios

A wire is bent into a rectangle. The ratio of the length of the rectangle to its breadth is 9:5. If the total length of the wire is 84 cm., find the area of the rectangle formed by the wire.

85. PHSICS

1. How much kinetic energy does a 1 kg ball have if it has a velocity of 10 m/s? Choose one answer.and explain a. 100 J. b. 50 J. c. 10 J. d. 5 J. 2. You have the grand idea that the science building would be better situated if you moved it North by 4

86. Physics

The graph below represents the velocity of a ball thrown straight up by a strong pitcher as a function of time. In the first part of the graph ending at A, the ball is accelerated to 39.2 m/s in a time of 0.20 s. After the ball leaves the pitcher’s hand,

87. history

opposition to jay's treaty and other federalist acts led to

88. college-chemistry

How do you know when a base is weak or strong?

89. chemistry

Discuss in detail the healthcare applications of chemical reactions. Which chemical reactions would you consider to be of importance to healthcare professionals? Why? In which situations are these chemical reactions useful to healthcare professionals

90. Physics

A man seeking to set a world record wants to tow a 110000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 70 kg, and the coefficient of static friction between his shoes and the runway is 0.76.

91. Physics

In a flexible container when the temperature of a gas increases the volume of a gas will... increase decrease

92. precalculus

show that the sum of two increasing functions is increasing

93. history

what were some of the ways in which social darwinism or the idea of survival of the fittest shaped american thought in the past?

94. education

Behavioral objectives clearly stated A. What the children will actually do B. How children should behave C. What children are interested D.the range of normal behavioral for children

95. education

Webbing Is A. Teacher created duck theme for classroom B.way to capitalize on children's ideal without enforcement a point to view on them c.planning tool that provides deputy to a topic and creates a map of possible activities and projects d. Technique to

96. physcical science

how much heat is needed to warm 200 grams of water from an initial temperature 24 celsius to 84 celsius

97. chemistry

how to draw atomic structure for elements from scandium to zinc ?and what is their valency number.plz show me the shell structure.

98. biological

how can a disaccharide be produced from two monosaccharides

99. Physics

A gull is flying horizontally 8.17 m above the ground at 6.35 m/s. The bird is carrying a clam in its beak and plans to crack the clamshell by dropping it on some rocks below. Ignoring air resistance, what is the horizontal distance to the rocks at the

100. Physics

A ball is thrown from a point 1.38 m above the ground. The initial velocity is 19.9 m/s at an angle of 33.8° above the horizontal. Find the maximum height of the ball above the ground. Calculate the speed of the ball at the highest point in the

101. Geography

Is Lima, the capital of Peru, east or west of the 80 degrees west line of longitude? Is this correct? East?

102. the girl who could fly book

Can somebody help me with this question, it is about the book the girl who could fly How can making inferences in literature help you determine how the societal conflicts in I.N.S.A.N.E. shaped Piper's identity?

103. finite math

for the previous ? it as to be set up in five steps I just can't figure out how to set it up to get the answers

104. pre-calculus

Find the intercepts of the graph of the equation y= x^2 -4 ________ X^2 -9 a. there is no intercept b. the intercept(s) is/are type the ordered pair, using intergers or fractions

105. calculus

Help with an integration question with the substitution given? Please help, i tried to to answer it but the working is too complicated can anyone help out there, the question says: Using substitution 5x=4cosØ to show ∫ √ (16-25x^2) dx = 4 π + 6√ 3

106. health

What does it mean to relax with deep breathing?

107. caculus

Following a polynomial, find a. the zero's and the multiplicity of each b. where the graph crosses or touches the x-axis c. the number of turning points d. the end behavior f(x)=(x+3)(x-5)(x+5)

108. caculus

Following a polynomial, find a. the zero's and the multiplicity of each b. where the graph crosses or touches the x-axis c. the number of turning points d. the end behavior f(x)=(x+3)(x-5)(x+5)

109. Trigonometry

a diagram shows a cross section of a triangular prism. AB=BC=7cm. BM=5cm m is the midpoint of the line segment AC. a) explain why angle AMB must be a right angle. b) calculate angle BCM. c) calculate area of the triangle

110. chemistry

chemical formula for potassium hydrogen sulfide? is it KHS?

111. Math

The perimeter of a rectangular soccer field is 20/3 meters. If the width of the soccer field is the reciprocal of the length, find the dimensions of the soccer field.

112. English

1. Where do you buy a scarf? -I buy it at the department store. 2. Where do you buy the scarf? -I buy it at the department store. 3. Where do you buy scarves? -I buy them at the department store. (Which question is correct grammatically?)

113. World Geo

What rights did Aboriginal people gain as a result of the Referendum of 1967? sk8gurl99

114. Physics

A 700# rock sits atop a 150 foot cliff. 1) If it is pushed off how much kinetic energy is in the rock just before it hits the ground? 2) How much potential energy does it have just before it hits the ground? On 2 will I use the mgh formula? If so what

115. Physics

What is the period of Earth's (nearly) circular motion around the Sun? (2*pi*r)/T 1 year (1 year)/(2*pi) (2*pi)/(1 year) 2*pi*(1 year)

116. Pre-Calculus

Is the difference of quotient of f(x) = -3x² -x equal to -3h - 6x - 1?

what does inference character mean

118. physics

a piece of wood 50 cm long , 20 cm wide, 40 cm thick. its density is 0.6 g cm^3. this is connected to a string with negligible mass attached to a piece of lead. what is the mass of the lead and what volume underneath is needed to sink the wood in calm

119. History

why does the pilgrims settlement of plymouth succeed?

120. Whole grains and refined graines

Whole grains or food food made from them,contain all the essential parts and naturally-occurring nutrients of the entire grain seed. True or false

121. Refined graines

The enriching process for refined grains adds back: a:folic acid b: thiamin & niacin c:iron d: all of the above

Why are files reduce in an organisation?

123. history

how is plymouth settlers are different from the settlers at the Jamestown?

124. Chemistry

Why is the formula for sodium nitrate NaNO3?

125. biology

how can you recognize carbohydrates from a list of biological molecules

126. physics

What is the general formula for energy?When asked to write formula for energy in general without specifying kinetic or potential or work can we write eienstien's e=mc2 formula?

127. Calculus AP

I'm doing trigonometric integrals i wanted to know im doing step is my answer right? ∫ tan^3 (2x) sec^5(2x) dx =∫ tan^2(2x) sec^4(2x) tan*sec(2x) dx =∫ (sec^2(2x)-1)sec^4 tan*sec(2x) dx let u=sec x, du= 1/2 tan*sec(2x) dx =1/2∫ (u^2(2x)-1) u^4 du

128. Physics

I wondered if someone would check my work concerning an Atwood's Machine. (I am led to believe the answers for these two questions should be the same but I'm not coming out that way.)Thank you! 8.) Caluclate the tension in the Atwood's Machine string for

129. physics

A vector A has components Ax = -7.0 m and Ay = -48.0 m. What is the the angle that vector A makes with the x-axis?

130. s.s

Which of the following is true with regards to the Navigation Acts by the eighteenth century? A. In general, the colonists despised the acts and smuggling was rampant. B. The acts replaced the colonial admiralty courts. C. The colonists became used to

131. Geography

Is this correct? What are the three continents with the largest land areas in the world? Asia Africa and north america

132. finite math

A company installs different POS computer systems. POS system A requires two hours to configure and one hour for assemble. POS B requires three hours to configure and one hour to assemble. POS C requires two hours to configure and two hours to assemble.

133. pre-calculus

analyze the graph of the function r(x)= 13x + 13 ________ 5x + 15

134. Creative and Critical Thinking

Together We Stand Letter Outline Suppose you live in a new suburban community that combines all the amenities and benefits of a tight-knit small community with the benefits of living close to the big city. Some years pass, and several children and adults

135. ela

How can making inferences in literature help you determine how the societal conflicts can make your identity?

136. pre-calculus

solve the following inequality 16(x^2-1) >16x the solution set is? or there is no solution.

137. Math

Word problem A woodcarver wants to make a scale model of a chair. The height of the model will be 3 inches which is 0.08 times the height of the fl sized chair What is the size if the full sized chair in inches?? I got : 5.4 inches. Is this right??

138. Physics

If a ball is kicked at 35 degrees above the horizontal, what is the speed to barely clear the 3m tall goal post 60m away?

139. science

what type of a drink did not floated or sank?

140. physics

If a ball is kicked at 35 degrees above the horizontal, what is the speed to barely clear the 3m tall goal post 60m away?

141. world history

How did spain change after the war with england in 1588?

142. Alg 2 (HS)

Solve 4^(x+2)= 160 use a cal and round your answer to the nearest hundredth How would I work out this problem? I'm a little confused with this one.

143. Trigonometry

in a diagram, PRS is a straight line. PQ = 9.2 cm, QS= 7.6cm and angle QPR =38 degrees.QR is perpendicular to PS. Calculate angle PQS to nearest 0.1 degrees

144. Alg 2 (HS)

If Y varies inversely as 3X^2, determine what Y would be if X = 4 and another point on the equation is (2, 48).

145. chemistry

Assuming that 0.5 grams of a 1.0 gram sample is CaCO3, what should the concentration of HCl(M) be if you want to use 25.0 mL for the titration?

146. Math

How is the principal payment calculated before interest is addes if; P = 50,000 interest = 9% and compounded for 7 years

147. Math

If a certain number, x, is added to 4/(x+1), the result is 3. Find the number.

148. math

how many thousandths in 1.069

149. math

a rectangle has a side of 28cm,12cm.what is the area of the least number of these rectangles used to form the smallest square possible?

150. mathematics

What is the domain of the functions f(x)= 1/root(x+|x|) f(x)= x|x|

151. Not sure what to put here... World Geo?

What is an example, or maybe even two examples of a plant that grows in one climate but also a climate that that plant doesn't grow in. Thank you very, very much to any help. 8) Thank ya, sk8rgur99

152. physics

1/(undr root 2 - 1) m/s

153. random question for high school

How do you get into IB?

154. precalculus

show that the composition of two increasing functions is increasing

155. Biology

The first cells evolved in an atmosphere that lacked free _____________. Their metabolism resulted in the accumulation of ________________ in the atmosphere. Fill in the blanks.

156. Math

I have a table and need the math rule but can't figure it out. If the table is: X and Y 2 3 4 4 6 5 8 6 What is the rule??

157. economic

Store managers must consider which of the following trait? A) Cultural style B) Age groups C) Income level D) All are correct

158. economic

In microeconomics, little emphasis is given to how prices are established and why they change. True or False?

159. economic

A price set above equilibrium price creates a shortage. True or False

160. mathematics

what is the domain of the function f(x)= 1/root([x]^2-[x]-6)

161. statistics

Five samples are taken every hour from a production line & the average hourly measurement weight of polymer beads is recorded. Approximately 1/7 of these averages exceed 2.50g when the mean value is approximately 2.40g. Determine the proportion of

162. mathematics

if [x] denotes the integral part of x, then what is the solution set of the equation [x]^2 -5[x]+6=0

163. Math

what are the zeros for 1x^5+2x^4+4x^3+19x^2+9x^2+9x-5?

164. US history

The sedation Act allowed the national government to jail people for

165. eoconomy

In which career is profit the main factor? it is doctor or teacher?

166. literature

What kind of man was Albert Camus?