1. Ed tech- Plz, plz help

The Second Industrial Revolution was not just marked by new inventions. New business practices were invented that transformed America’s economy. Between 1869–1910, the value of American manufacturing rose from $3 billion to$13 billion. The steel

2. 3 questions~~~

1. What does the term "fair-use exception" mean? (1 point) to use only material that has never been published the ability to use material made by others for educational purposes an exception to copyright restrictions for images only Educational material is

3. CALCULUS

Sketch the region enclosed by the given curves. y = 4/X y = 16x, y = 1X/16 x > 0 and the area between the curves

12. Physics (Rotation)

In the figure, wheel A of radius rA is coupled by belt B to wheel C of radius rC. The angular speed of wheel A is increased from rest at a constant rate α. Find the time needed for wheel C to reach angular speed ω assuming the belt does not slip. (Hint:

24. algebra

Use the fact that after 5715 years a given amount of carbon 14 will have decayed to half the original amount to find the exponential decay model for carbon 14. In 1947, earthenware jars containing what was known as the Dead Sea scrolls were found by an

25. MATH_URGENT

Let M be the midpoint of side \overline{AB} of \triangle ABC. Angle bisector \overline{AD} of \angle CAB and the perpendicular bisector of side \overline{AB} meet at X. If AB = 40 and MX = 9, then how far is X from line {AC}?

26. Energy question

Your friend comes across a good deal to purchase a gold ring. She asks you for advice for you to test the ring. The ring has a mass of 4.54 g. When you heat the ring with 94.8 J of energy, its temperature rises from 23.0 degrees celsius to 47.5 degrees

27. Algebra

F(t)= 30000/1+20e^-1.5t Describes the number of people, f(t), who have become ill with influenza t weeks after the initial outbreak in a town with 30,000 inhabitants. a.) How many people became ill with flu when the epidemic began? b.) How many people were

28. math

There are 3 white marbles and 7 blue marbles in a bag. Jamie will randomly pick two marbles out of the bag without replacing the first marble chosen. What is the probability of Jamie picking two blue marbles

29. algebra

F(t)= 30000 1+20e^-1.5t Describes the number of people, f(t), who have become ill with influenza t weeks after the initial outbreak in a town with 30,000 inhabitants. a. How many people became ill with flu when the epidemic began? b. How many people were

30. Chemistry

If the titration of a 25.0 mL sample of calcium hydroxide requires 34.45 mL of 0.100 M perchloric acid, what is the molarity of the base? 2 HClO4(aq) + Ca(OH)2(aq) → Ca(ClO4)2(aq) + 2 H2O(l)

31. math

I have 7 different pairs of jeans and want to take 2 with me on vacation. how many different ways can you pick 2 pairs of jeans to take on vacation. sorry for not proofing before

32. birzit

boy on the edge of a vertical cliff 20 m high throws a stone horizontally upwards with a speed of 25 m\s it strikes the ground at what horizontal distance from the foot of the cliff use g=10m\s^2

33. Energy question

How would a $10.00 compact fluorescent light bulb (15 W) be an overall money saver compared to an incandescent light bulb (60 W) that costs$0.50?

34. Health

What type of health hazard could occur by wearing jewelry while preping food?

35. math

Sam Seller offers credit at 19% interest per year.

36. Chemistry

Calculate ΔG∘rxn and E∘cell for a redox reaction with n = 1 that has an equilibrium constant of K = 28? What would the answer be to this? Could someone work this out for me please? ΔG∘rxn = ......kj E∘cell = ......V

37. Chemistry

Calculate pH of an acetate buffer containing 27.5 mM acetic acid (pKa is 4.74) and 50 mM sodium acetate. When a 30 mM aq solution of sodium acetate was prepared in the lab it had a pH of 8.8. Calculate the amount of acetic acid (in g) to be added to 0.5 L

38. chemistry

1. Calculate pH of an acetate buffer containing 27.5 mM acetic acid (pKa is 4.74) and 50 mM sodium acetate. When a 30 mM aq solution of sodium acetate was prepared in the lab it had a pH of 8.8. Calculate the amount of acetic acid (in g) to be added to 0.5

39. Energy multiple choice question

Which of the following samples has the highest specific heat capacity? a) A 100 kg sample of lead requires 13 000 J to increase its temperature by 1 K b) A 50 g sample of water releases 1050 J as it cools by 5 degree Celsius c) A 2 kg sample of copper

40. CHEMISTRY

WHAT IS THE EMPIRICAL FORMULA FOR A COMPOUND THAT HAS 200GRAMS. 97.30 GRAMS OF CARBON, 16.22 GRAMS OF HYDROGEN, AND THE REST IS OXYGEN?

41. Math

The regular pentagon have a perimeter of 18.8 units. What is the value of X?

42. Math

We are learning about proofs. We drew lines between noncollinear points. Our table showed 2 points >> 1 line segment, 3 point >> 3 line segments, 4 points >> 6 line segments, 5 points >> 10 line seg, 6 points >> 15 line seg. etc. Write an expression in

62. physics

A cylindrical conductor of radius carries a uniformly distributed current I. Show that the magnetic field within the conductor measured at a distance r from the center is given by the following equation... B= (u0Ir)/2pi a^2

63. Algebra

Medical research indicates that the risk of having a car accident increases exponentially as the concentration of alcohol in the blood increases. The risk is modeled by R=6e^12.77x Where x is the blood alcohol concentration and R, given as a percent, is

64. Criminal Justice

Question: The primary purpose of ethical injury is to: A. find all the possible solutions to a problem. B. critically reflect upon how we live and the choices we make. C. learn about the philosophies of the past 2000 years. D. Memorize relevant codes of

65. Calculus

For what values of x is the graph of y=x e^{-4 x} concave down?

66. Math

Ruth Anne used 0.8 meters of cord to trim a picture frame. How many more frames of this size can she trim with 13.5 meters of additional cord.

67. Energy question

how could you determine the efficiency with which the mechanical energy of a pendulum is conserved?

68. maths

pls help me to do this sum.... THE DISTANCE BETWEEN THE SCHOOL AND THE HOUSE OF A STUDENT'S HOUSE IS 1 KM 875M.EVERYDAY SHE WALKS BOTH WAYS.FIND THE TOTAL DISTANCE COVERED BY HER IN 6 DAYS?

69. math

consider the sets. A= {distinct letters in work Keep} B= {13} C= {k,e,p} D= 1 in red + 1 in black} E= {two} F= {2} What is the cardinality of each set? A= I can not figure that one out B= 1 C= 3 D= 0 E= t,w,o F not sure Can you give me some ideas Thank you

70. Chemistry

If a particular reaction evolves 192 kJ of heat while expanding from 1.00 L to 2.00 L at 125 atm of pressure, what is the overall energy change for the system?

contrast the four types of subsistence strategies, being sure to include differences in lifestyle, kinship, property ownership, distribution of resources and division of labor. Thank you!

74. maths

the rate of the fall of an object can be determined by the formula h=1/2gt^2 where h is the height, g is the acceleration due to gravity and t is time in seconds. If a gun is fired 5 feet above the ground and level to the ground, how far would the bullet

75. science

Identify and discuss the main safety legislation applicable to the installation, commissioning operating and maintaining the tube swaging machine.

76. chemistry

It is possible to manipulate the solubility of some compounds through pH adjustments. What is the appropriate pH that will yield a Molar solubility for Mg(OH)2 of 2.51 x 10-8? The Ksp for Mg(OH)2 is 1.2 x 10-11. (Hint: you may assume the concentration of

77. Criminal Justice

Which of the following would be of greatest concern from an ethical standpoint? A. The number of homicide victims in a given place during a given time period. B. The legal elements of the crime of homicide. C. Whether capital punishment is a justifiable

78. Biology

Im stumped... These answers I cannot find, please and thank you :) 1) In males, the primary target of FSH is the ______. 2)Testosterone and other androgens are secreted by the______. 3)During meiosis, when synapsis occurs, corresponding maternal and

79. chemistry

If a particular reaction absorbs 252 kJ of heat while doing 105 kJ of work at constant pressure. What are the ΔE and ΔH for values for the reaction? Is the reaction endothermic or exothermic?

80. Sociology

If Andrea's parents have her take violin lessons, take a foreign language and attend science camp in hopes of her developing skills so she can get into a competitive college, is that an example of human capital or cultural capital? I was leaning towards

81. Epi

a. A study of the relationship between exercise and heart attacks that is conducted among women who do not smoke. Explain whether gender is a confounder.

82. math

you have a spinner labeled 1 through 10. you spin once. what is p (divisimble by 2)

83. Algebra

x over 2x-5 - 5 over 6x-15

84. calculus

in the following series x is a real number. In each case use the ratio test to determine the radius of convergence of the series. Analyze the behavior of the series at the endpoints in order to determine the interval of convergence. A) (nx^n)/(n^2 + 2)

85. Algebra

Bobo bought a 1 ft squared block of cheese. He needs to cut it into 3 in. cubes. The block is yellow outside but green on the inside. How many 3 in. cubes does it have? How many of the cubes have no yellow face, one yellow face, 2 yellow face, etc. Please

86. Algebra

log base 2 x + log base 2 (x-7)=3 solving steps?

99. Food and Nutrition

How is "Healthy Ice-Cream Alternate Sandwich" a healthy recipe?? Ingredients: 10-12 ripe bananas 1/.5 cup of strawberries 22 graham crackers Procedure: 1)Mash the bananas and make a mixture with the strawberries and bananas 2)Freeze the mixture 3)put the

100. algebra

How long, to the nearest day, will it take $25,000 to grow to$500000 at 9% annual interest compounded monthly?

101. art 101

What kind of light brings the greatest appearance of depth in a photo.

102. alegebra

solve this equation -2(6v-8)-2=13-12v

103. maths

assuming the brain is shaped as a hemispere, find the circumference of the brain if the volume is 1.3KG

104. Physics

5.00 kg of some liquid at 10.0 oC is mixed with 1.00 kg of the same liquid at 40.0 oC. what is the final equilibrium temperature? ignore any heat flow with the containers and/or surroundings

105. English

Which literary term best matches this? A group of four rhyming lines.

106. alegebra

slove this equation 4.4(4+5k)=145.2

107. alegebra

solve this equation 4.5(3v-0.8)-0.83=61.72

108. Statisttic

If 3 cards are drawn, without replacement, from a deck of 52 cards, the probability of getting 3 7's is [x]. Round to 5 decimal places.