1. math

The triangle inscribed within square ABCD has, as its base, side AD, and has a height of 6 cm. If the area of the triangle is 21 cm2, what is the area of the shaded region?

2. physics

A sprinter can accelerate with constant acceleration for 2.10s before reaching top speed. He can run the 100-meter dash in 10 s. What is his speed as he crosses the finish line?

3. college physics

Nobel laureate Richard Feynman (1918-1988) once said that if two persons stood at arm's length from each other and each person had 1% more electrons than protons, the force of repulsion between them would be enough to lift a "weight" equal to that of the

4. College algebra

Allison drove home at 58 mph, but her brother Austin, who left at the same time, could drive at only 40 mph. When Allison arrived, Austin still had 108 miles to go. How far did Allison drive?

5. Geography (Ms. Sue)

1). Which industries drive Canada's economy? 2). In which region is the majority of the population located? 3). Which bodies of water do the Atlantic Provinces border? 4). What is the major economic activity of the Atlantic Ocean? 5). Which provinces make

6. Chemistry

In a reaction between pure acetic acid and sodium bicarbonate, 14.7 grams of sodium bicarbonate was added to 21.0 mL of acetic acid. Which reactant is the limiting reactant in this reaction? Name of limiting reactant (acetic acid or sodium bicarbonate):

7. Physics

Ten identical lengths of wire are laid closely side by side. Their combined width is measured and found to be 14.2 mm. Calculate: a)the radius of a single wire b)the volume in mm cubed of a single wire if its length is 10.0 cm. (Volume of a cylinder =

8. AP Chemistry

Given the Na+/Na and K+/K half-cells, determine the overall electrochemical reaction that proceeds spontaneously and the E0 value. Answer in units of V

9. Math - Averages

The test average for Louis' calculus class is found by taking the arithmetic mean of his four best test scores. If his first four test scores are 65,82,76 and 87, what score must he get on the fifth test to raise his test average to an 85?

10. chemistry

While in Europe, if you drive 117km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 32.0mi/gal ? Assume that 1euro=1.26dollars.

11. math

The owner of a luxury motor yacht that sails among the 4000 Greek islands charges \$630 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare

12. chemistry

what volume of 16 sulfuric acid must be used to prepare 1.5 L of a 0.10 M H2SO4 solution

At a country concert, the ratio of the number of boys to the number of girls is 2:7. If there are 250 more girls than boys, how many boys are at the concert?

14. math

Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water

15. PHYSICS

Nobel laureate Richard Feynman (1918-1988) once said that if two persons stood at arm's length from each other and each person had 1% more electrons than protons, the force of repulsion between them would be enough to lift a "weight" equal to that of the

16. Healthcare Finance

Jane Smith currently holds tax-exempt bonds of Good Samaritan Healthcare that pay 7 percent interest. She is in the 40 percent tax bracket. Her broker wants her to buy some Beverly Enterprises taxable bonds that will be issued next week. With all else the

17. Criminal justice

1. What protects offenders by ensuring proportionate and non-arbitrary punishment? A. Criminal law B. Criminal action C. Criminal rights D. Criminal activists is it C 2. At the federal level, what reference is used when referring to trial courts? A. Courts

18. Precalculus

A ball is dropped from a cliff that is 224 feet high. The distance S (in feet) that it falls in t seconds is given by the formula S=16t^2. How many seconds (to tenths) will it take for the ball to hit the ground?

19. calculus (integral)

evaluate the integral: integral of 13/(x^3 - 27) dx

20. Inroduction to Managment Science

reboot inc, manufacturer of hiking boots. make a rough sktch of a spreadsheet model, with blocks laid out for the data cells changing celss, ouput cells, and target cells.

21. Pure Mathematics

The complex number z satisfies the equation z+2iz*=12+9i. Find z giving your answer in the form x+iy.

22. Math

Gloria's garden plot is one foot wider and three feet shorter than last year garden but has the same area. What were the dimensions of the garden last year?

23. science

Compare and contrast the reproduction of mosses, ferns, gymnosperms, and angiosperms

24. science

why is sexual reproduction better than a sexual reproduction for ensuring the survival of a species in a changing environment?

25. physics

A 58 kg boy and a 38 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 3.1 m/s 2 , determine the magnitude of the acceleration of the boy toward the girl. Answer in

26. Science

Helium doesn't react with any other substance. Is it accurate to say that helium has no chemical properties? Explain. Please help because I'm not sure of the answer. Thank you.

27. Physics

David is driving a steady 21.0m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.50m/s2 at the instant when David passes. How far does Tina drive before passing David? What is her speed as she passes him?

28. PURE MATHEMATICS

1. The complex number 'a' is such that a^2=5-12i use an algebraic method to find the two possible values of 'a' 8. The complex number z is given by z=cosTheta + isinTheta where -1/2pi< or equal to Theta less than or equal to 1/2pi. a. show that

29. chemestry

A 1.00 g sample of naphthalene (C10H8) contains 0.562 g of hydrogen. What is the mass percent of carbon in the compound

30. Geography (Ms. Sue)

1). In what industry do most Americans work? 2). How did California become the nation's most populous state? 3). How has the economy of the South changed? 4). How has U.S population shifted since the country began? 5). What helped the economy of the West

31. Order Pairs Math

Which ordered pair is a solution of the equation y = x – 3? (–2, 5) (–5, 2) (2, 5) (5, 2) Which ordered pair is a solution of the equation y = 5x? (–2, 10) (–5, 25) (–3, 15) (–2, –10) Which ordered pair is a solution of the equation y =

1. What is the product of (-6.8)^2? -13.6 46.24 -46.24 13.6 2. Find the product. 5/10 * 10/3 23/6 -5/7 -7/5 5/3 3. Find the quotient. 3/7 ÷ 1/2 3/14 6/7 13/14 4/7 4. Simplify the expression. 3/4 ÷ 2/5 3/10 23/22 15/8 5/9 My answers: 1. 46.24 2. 5/3 3.

33. physics

A large, flat, horizontal sheet of charge has a charge per unit area of 2.05 µC/m2. Find the electric field just above the middle of the sheet. kN/C

34. math

Find, correct to the nearest degree, the three angles of the triangle with the given vertices.? A(2, 0),B(4, 5), C(-3,2) ANGLE- CAB ANGLE- ABC ANGLE- BCA In degrees. I got the vectors AB BC AC and I know the equation b.c= |b| |c| cos t

35. PHYSICS

A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

36. physics

The electric field everywhere on the surface of a thin, spherical shell of radius 0.710 m is measured to be 860 N/C and points radially toward the center of the sphere. (a) What is the net charge within the sphere's surface? nC (b) What can you conclude

37. chemistry

At 1 atm, how much energy is required to heat 79.0 g of H2O(s) at –20.0 °C to H2O(g) at 121.0 °C?

38. physical mod

What mass (in grams) of steam at 100°C must be mixed with 462 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 40.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and

39. math

a solid metal sphere of radius 32cm is melted down and recast to make 64 identical small spheres.what will be the radius of each small sphere?please explain ,thanks

The ratio of the number of adults to the number of students at the prom has to be 1:10. There are 477 more students than adults. How many adults are at the prom? 1/2x+477=10/2x?

41. Statistics

I have no idea on how to answer this question... "Use technology or a standard normal distribution table to find the area to the left of z=1.58. Do I plug in 1.58 in my calculator to find the answer?

42. Healthcare Finance

2 A firm that owns the stock of another corporation does not have to pay taxes on the entire amount of dividends received. In general, only 30 percent of the dividends received by one corporation from another are taxable. The reason for this tax law

43. Algebra

Suppose a square garden has an area represented by 9x^2 square feet. If one side is made 7 feet longer and the other side is made 2 feet shorter, then the trinomial that models the area of the larger garden is 9x^2 + 15x - 14 square feet.

44. significant figures- chemistry

I'm having trouble understanding significant figures. If a problem is requires two equations to finish, which of the original measurements do I use to figure out the significant figure? For ex. 3.001+4.32= 7.321. Then I use this answer for a different

45. teacher aide

when are children first developmentally ready to begin learning science

46. algebra

How do I translate this to an equation? "A number added to -11 amounts to -22. Thanks for your help.

47. Physics

A long, straight metal rod has a radius of 6.00 cm and a charge per unit length of 36.0 nC/m. Find the electric field at the following distances from the axis of the rod, where distances are measured perpendicular to the rod. (a) 1.50 cm N/C (b) 13.5 cm

48. Healthcare Finance

2 A firm that owns the stock of another corporation does not have to pay taxes on the entire amount of dividends received. In general, only 30 percent of the dividends received by one corporation from another are taxable. The reason for this tax law

49. Math - Percents

Roberto has 40 marble, and Imelda has 27 marbles. Roberto gives 15% of his marbles to Imelda. Imelda now has what percent more marbles that she had before?

50. Statistics

I have no idea on how to answer this question... "Use technology or a standard normal distribution table to find the area to the left of z=1.58. Do I plug in 1.58 in my calculator to find the answer?

51. Physics

If an electron travels 0.150 m from an electron gun to a TV screen in 19.0 ns, what voltage was used to accelerate it? (Note that the voltage you obtain here is lower than actually used in TVs to avoid the necessity of relativistic corrections.)

52. Maths

A bookshelf has 5 shelves its made from wood that is 30 mm thick and the shelves are evenly spaced Bookshelf is 2100mm high 600mm long and 300mm wide Mark out the sides and shelves from a piece of wood 2400mm long and 1200mm wide a saw cut is approximately

This 35-year-old female patient has carcinoma of the upper-outer left breast. She had a lumpectomy performed and a sentinel lymph node biopsy of the axillary lymph node. The pathology report for the lymph node states no pathological change.

54. Physics

Paige and Julia are playing volleyball. Paige is in spiking position when Julia gives her the perfect set. The 0.226-kg volleyball is 2.29 m above the ground and has a speed of 1.06 m/s. Paige spikes the ball, doing 9.89 J of work on it. Determine a) the

55. Physics

A block is sliding along a frictionless surface at a speed of 3.6 m/s. It hits a spring of spring stiffness constant k = 150 N/m. How far has the spring compressed when the block comes to a stop?

56. chemistry

what law allows us to calculate a change in volume when the temperature changes , but the pressure is held constant

57. Geography (Ms. Sue)

1). Why is the Unites States a leader in agricultural products? 2). How has the economy of the South changed? 3). How has U.S. population shifted since the country began? My answers to these questions are the following: 1). The United States is a leader in

58. PHYSICS

(a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one

59. PHYSICS

In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton, where the radius of the orbit is approximately 0.542 multiplied by 10-10 m. (The actual value is 0.529 multiplied by 10-10 m.) (a) Find the electric force

60. physics

The charge per unit length on a long, straight filament is -87.0 µC/m. (a) Find the electric field 10.0 cm from the filament. Distances are measured perpendicular to the length of the filament. (Take radially inward toward the filament as the positive

61. chemistry

A particle with the mass of a proton is trapped in a box. The particle falls from the n=3 state to the n=2 state and emits 0.16 meV of energy. What is the size of the box? Please report your answer in nm. An electron is trapped in a box of length L = 100

62. Math - Trnslating Eng to Algebra

Angie's age is 7 less than twice her age five years ago. How old is Angie now?

63. Legal studies

What happens when an appellate court reverses a lower court’s decision? A. The case is sent back to the trial level for further action consistent with the appellate decision. B. The reversal nullifies or sets aside a trial verdict. C. The reversal sets

64. Criminal justice

What protection is provided by the Fifth Amendment? A. Double jeopardy B. Self-incrimination C. Due process violations D. All of the above im confused between A and D

65. physics

A ball is thrown directly downward with an initial speed of 7.00 m/s, from a height of 30.4 m. After what time interval does it strike the ground?

66. Maths

Can you use 4 nines 9999 And normal operations to arrive at 100

67. Finance

Chip’s Home Brew Whiskey management forecasts that if the firm sells each bottle of Snake-Bite for \$20, then the demand for the product will be 15,000 bottles per year, whereas sales will be 91 percent as high if the price is raised 18 percent. Chip’s

68. Math

Factoring Polynomials (please show step by step) -8z^3 + 512w^3

69. Math

Determine the number of diagonals in a regular 40-gpn

70. Biology 101

When we say an atom has an incomplete outer shell, this means the atom has ______________________ electrons in its outermost shell. Atoms that have incomplete outer shells usually seek to fill their shells by forming ____________________ ________________

71. chemistry

how much oes 3.10cm3 of copper weigh

72. chemistry

what is the configuration of an electron

73. math

by cutting a square out of each corner of a sheet of card (30cm by 21cm)and folding up the sides,i ca make an open box with a capacity of 1080cm^3.What is the area in cm^2 of each of the squares i have to cut out?

74. math

Anne wants to tie a support line from the top of a 50 foot radio tower to an anchor spot 30 feet from the tower’s base. Approximately how long will the line need to be?

75. Early Childhood Education

We show we value families when we do which of the following?

76. Life Science

Im doing 7th grade life science. (im 13.) I need to make sure my answers are right because my homework is being graded. I think i have most of them right but we'll see. I DO NOT want you to tell me the answer to my homework. I just want you to tell me if

77. Math

What's the equation of the line containing the given pair of points. (1,4) and (3,5)

78. Maths

9 is a very strange digit. Try to use four nines 9999 and normal operations plus minus multiply divide brackets etc, use 4 nines to make 20

79. chemistry

given an atmospheric pressure of 750mm Hg, find the partial pressures of nitrogen, oxygen. carbon dioxide and argon

Using the price per dinner that you determined in the previous question, calculate the following. If Epicure offers a \$1-off coupon in a newspaper advertisement, what markdown percent does the coupon represent? (Round percent to the nearest tenth.)

81. statistics

A sample of 106 students, the researchers reported the following statistics...mean= 13.2 s=19.5 Explain why the distribution for these 106 students cannot be symmetric and given this, what % of 106 students fall within the x+/-2s? I understand it cannot be

82. chemistry

how many sig figs in this number: 32.6721

83. Math

Find the value of (X-5x+4)if x=7

84. chemistry

conver 0.100Kg to g

85. chemistry

conver 0.100Kg to g

86. chemistry

conver 0.100Kg to g

88. Trig

suppose tan theta equal 4 and theta lies in the third quadrant. find the values of sec theta

89. physics

A car comes to rest uniform deceleration at the rate of 5.8 m/s2 for 14.3 seconds. What is distance did it travel during this time??

90. math

It is between 7 and 8 million it contains all the digits greater then 1 and less then 8 the hundred thousands digit is 3 the ten thousands digit are the same their sum is the ones digit the tens digit is greater then the hundreds digit

91. physics

A 30.0 cm diameter loop is rotated in a uniform electric field until the position of maximum electric flux is found. The flux in this position is 5.60 multiplied by 105 N·m2/C. What is the magnitude of the electric field? MN/C

92. geometry

Each of the three circles have a radius of 10. The line OA contains the center of the three circles, and the line OB is tangent to the right-hand circle. Find the length of segment CD

93. math

PQRST is a regular pentagon. U is the reflection of R in QS.how big is angle UST

94. biology need help

what word is the definition of "all of the populations in a given area." and some examples

95. math

a square has a area of 60sq cm.what%is the area of one of the triangles formed by drawing both of the diagonals of the square of the area of the remaining triangles?

96. geometry

if the line ab bisects the segment cd at p then p is the mid point of segment cd

97. Math - General word problem

At a certain dance class, each student must pick exactly one partner. Each pair of dancers must consist of one advanced student and one beginner student. At first, after everyone pairs up, there are 4 extra beginner students. Then, after half of the

98. Math

Negative 11 - negative 41

100. Math - Translating English to Algebra

At Marv's Pet store, there are m mice and f ferrets. If he sells 20 mice, there will still be twice as many mice as ferrets. If he sells 20 ferrets, there will be 14 times as many mice as ferrets. How many ferrets does Marv's Pet Store have?

101. Precalculus

That is my question, i don't know what t equals when 224=16t^2

102. Math - Percents

If 200% of a number n is decreased by 12.5%, the result is 28. What is the value of n?

103. MAth - Percents

Bobby makes a commission on each stereo that he sell; this commission is equal to 40% of the final(sale) price of the stereo. Today, all the stereos in Bobby's store are on sale for 10% off the listed price. During this sale, what percent of the listed

104. Math - Percents

Polly mixes 2 gallons of windshield wiper fluid with 8 gallons of water. The resulting solution is made up of k% windshield wiper fluid. What is the value of k?

106. Integers (urgent)

For what integer values of x is x+1-2 positive?

107. Precalculus

So far i have gotten answers that i already knew. I know that 224=16t^2 goes to 14=t^2 but what squared equals 14?

108. Math - Averages

Six dogs have an average(arithmetic mean) weight of 55 pounds. If the heaviest dog weighs 100 pounds, the lightest dog weighs 5 pounds, and the second-lightest dog weighs 30 pounds, what is the average weight of the other 3 dogs in pounds?

109. chemistry

acid rain --how does it cause environmental and health problems

25-n=17

111. Math - Factoring

If r is a multiple of 3, which of the following could not be the remainder when r to the power of 2 is divided by 10?

112. Maths

Can you use 4 nines 9999 and normal operations to arrive at 20?

113. Math - Factoring

When a positive integer z is divided by 9, the remainder is 2. what is the remainder when 4z is divided by 6?

114. Maths

Can you use 4 fours 4444 and normal operations to arrive at 4?

115. Math

What is the slope of the line that goes through the given points. (3,5) and (4,9) M=?

116. MATH

Find the slope of the line that passes through the given pair of points. (-1, 2) and (3, 4)

117. Math

What is an equation of the line having the given slope and containing the given point M = -8,(4,6)

118. Math

What is an equation of the line having the given slope and containing the given point. Please express your answer in the form y=b or y=mx+b

119. Math

What's the equation of the line containing the given pair of points. (1,4) and (3,5)

120. Math

I have to determine the unknown length of a right triangke to the nearest tenth of a unit. One side is 7m and the base is 10m. I got a friend to do this and age came up with 7.1m as the answer. When I do the steps I get the answer 12.21. I believe my

121. History

Helium doesn't react with any other substance. Is it accurate to say that helium has no chemical properties? Explain. Please help because I'm not sure of the answer. Thank you.

122. books

what kind of garment won't the speaker wear

123. science

A car is traveling down the road at 25 m/s,and then increases their speed to 45 m/s in 5 seconds. What is this car's acceleration?

124. Maths

9 is a very strange digit. Try to use four nines 9999 and normal operations plus minus multiply divide brackets etc, use 4 nines to make 100

125. Algebra

What is the measure of each of the angles of a regular 5 sided polygon

126. Algebra

write the equation in slope intercept form and identify the slope and y-intercept 4x+9y=4

127. Language Arts

Identify the preposition in the following passage:"Actually, it was just some pungent daikon(long white radish), sent by a friend who knew Papa loved eating it with rice and hot tea." just and by by and with*** some and who actually and with Am I correct

128. Algebra

What is the measure of each of the angles of a regular 5 sided polygon?

129. Algebra

In a triangle ABC, point o is the incentre AD=2", AB=9" and BC=10" find y

130. STATISTICS

TRUE OR FALSE? Simple regression cannot be applied when r of two variables is very low.

131. Math

(7 + 5) + 4 X 13 - 2 Is this 62?

132. Math

If the fraction 54/e is a fraction in lowest terms, what is the possible value of e?

133. religion

What is an example of a time when two people were competing for honor.

134. math

If the odds against John winning the election are 1 to 7,what is the probility that john will win the election

135. math

If you had 9 quarters, 6 dimes, 2 nickels and 3 pennies in a box, select on coin at random. What is the expected value of this experiment?

Hi, Could you give me your opinion if I should add more to. Thank you Why is political correctness important? Political correctness is important because we need to be sensitive to stereotyping against race, gender, sexual orientation, ethnicity, religion,

137. Psy

Suggest one psychological research question that could be answered by each of the following types of statistical tests: •z test •t test for independent samples, and •t test for dependent samples

138. pre calc

Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water?

139. Math

What is variable

140. Math

If x=4 and y=-1,find the value of 3xy

141. Algebra

Find the a-b if a =3 and b =5

142. Algebra

show me how to simplify 4+1 to whole number

143. Algebra

If a= b-c/2 Find the value of a when b=2 and c=4

Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water

145. Biology ms sue

Hi ms sue you had answerd question abt whether culture ethic have influence over environmental ethics or vice Versa could it be that both have effect over each other ? Why only culture have effect over it ? Cause do environmental ethics change way we

146. Algebra

In order to covert temperature from Celsius to Fahrenheit,one can use the following equation f= 1.8c+32,where C is the temperature in Celsius and F is the temprature in Fahrenheit.what is the temperature in Fahrenheit when C is 15 degree?