# Questions Asked onNovember 3, 2011

1. ## Chemistry

Okay so I kinda understand where to put the numbers into the formula but i'm not sure how to calculate the distance so could someone kindly walk me through the problem so i can understand it. Thank you so much. Calculate the amount of energy required for

2. ## Physics

A baseball bat balances 61.1 cm from one end. If a 0.600 kg glove is attached to that end, the balance point moves 22.7 cm toward the glove. Find the mass of the bat.

3. ## Physical Science

DISTANCE-TIME for RUNNERS Time(s) 1 2 3 4 Sally's Distance(m) 2 4 6 8 Alonzo's Distance(m) 1 2 2 4 Make a distance-time graph that shows the motion of both runners. What is the average speed of each runner? Which runner stops briefly? Over what time

4. ## physics

A tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 56.0 m/s and returns the shot with the ball traveling horizontally at 44.0 m/s in the opposite direction. What is the impulse delivered to the ball by the racket?

5. ## Math

The length of a track around a football field is 1/4 mile. How many miles do you walk if you walk 2 3/4 times around the track?

6. ## Physics

An Alaskan rescue plane traveling 36 m/s drops a package of emergency rations from a height of 137 m to a stranded party of explorers.Where does the package strike the ground relative to the point directly below where it was released

Select all that follow the trends of lattice energy: BaO > KF 1. Fluorine is more electronegative than oxygen. 2. The ions in BaO are +2 and -2; whereas in KF they are +1 and -1. 3. The atomic radii of Ba and O are smaller than those of K and F. 4. The

8. ## Physics

A set of fossilized triceratops footprints discovered in Texas show that the front and rear feet were 3.2 m apart. The rear footprints were observed to be twice as deep as the front footprints. Assuming that the rear feet pressed down on the ground with

Lee Holmes deposited $15,000 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional$40,000 at 9% intrest compounded semiannually. At the end of 6 years, what is the balance in Lee's account?

10. ## geometry

In ∆RST, RS = 10, RT = 15, and m∠R = 32. In ∆UVW, UV = 12, UW = 18, and m∠U = 32. Which of the following statements is correct? 1. ∆RST ∼ ∆WUV and the similarity ratio is 56. 2. ∆RST ∼ ∆UVW and the similarity ratio is 56. 3. ∆RST ∼

11. ## chemistry

a 10.0mL sample of an unknown H3PO4 solution requirs 112mL of 0.100 M KOH to completely react with the H3PO4. What was the concentrartion of the unknown H3PO4 solution? H3PO4 + 3KOH -----> 3H2O + K3PO4 Ive seen these problems with one volume but not two

12. ## chemistry

Calculate the molarity of the commercial bleach before it was diluted. bleach 6.25%

13. ## Physics

A torque of 0.13 N*m is applied to an egg beater. If the egg beater starts at rest, what is its angular momentum after 0.50 s?

14. ## physics

A 60 kg skydiver moving at terminal speed falls 50 m in 1 sec. What power is the skydiver expending on the air? The terminal speed of the falling object is the maximum constant speed the object will reach due to the opposing force of air resistance.

15. ## LiteratureSATIRE143

PLEASE CORRECT!! _______ 1. A Modest Proposal satirizes — A English policy in Ireland B Irish bankers C people who do not pay rent D problems caused by overpopulation ______ 2. The narrator of AModest Proposal assumes the character of a(n) — F American

32. ## chemistry

Iron reacts with superheated steam(H2O) to form hydrogen gas and the oxide Fe2O3. (write) Balance this chemical reaction. And if 10grams of Iron react with excess steam, how many grams of Fe2O3 are produced? How many grams of H gas? How many grams of H2O

33. ## physics

A centrifuge is a common laboratory instrument that separates components of differing densities in solution. This is accomplished by spinning a sample around in a circle with a large angular speed. Suppose that after a centrifuge in a medical laboratory is

67. ## chem

A 2.30 L sample of O2(g) was collected over a liquid at a total pressure of 785 torr and 25°C. When the O2(g) was dried (vapor of that liquid removed), the gas had a volume of 1.93 L at 25°C and 785 torr. Calculate the vapor pressure of this liquid at

68. ## physical science

If a book sits on a shelf1.5 m above the floor.One frienf tells you that the book's mechanical energy is zero, and another says it is not . Who is correct?

69. ## english

Identify the pronoun in the sentence below. Also identify the class and noun function of the pronoun using the abbreviations from the chart. For intensive pronouns, put NONE for noun function. That was a very long phone call.

70. ## MATH....

Determine the level of the confidence given the confidence coefficient z(α/2) for the following situation: z(α/2) = 1.96

71. ## physics.pls help

The volume of a cylinder is defined by the formula V=pie R squared h. If initially have a cylinder with a volume of 10m cubed. Find the volume of the cylinder if the height doubles and if the height is cut in half. pls i really need help.

72. ## english

for my comparison essay i am analysis of the 2nd device for katy perry song fireworks.. i need help explaining this line into details. could somebody give me like at least 1-2 sentence explaining it. this is what i got so far: Perry then uses imagery when

73. ## English

HELP. How do would you annotate this? and answer the questions under the passage..??? But now, fearing death, all eyes fixed on Charybdis now Scylla snatched six men from our hollow ship, the toughest, strongest hands I had, and glancing backward over the

74. ## physics

A 2kg block is placed onto a vertically oriented spring whose spring constant k is 1960 N/m. Find the distance that the spring will be compressed.

75. ## Algebra ii

City B is due north of city A. City A has a latitude of 14.6 degrees N, and city B has a latitude of 47.2 degrees N. find the distance in kilometers between the cities.

76. ## math

A piece of plywood is cut into strips 2 1/2 inches wide. How many strips of this width can be cut? HELP!!!

77. ## economics

A monopolist faces market demand given by P = 200 â€“ Q. For this market, MR = 200 â€“ 2Q and MC = 3Q. What quantity of output will the monopolist produce in order to maximize profits?

78. ## science, ocean currents

waste produced by people in delaware has been dumped into the atlantic ocean, where it is distributed by surface ocean currents. which coastal area is most likely to become polluted by this waste

79. ## science, ocean currents

waste produced by people in delaware has been dumped into the atlantic ocean, where it is distributed by surface ocean currents. which coastal area is most likely to become polluted by this waste

80. ## Science

At an accident scene, 276-m long skid marks are found on the road. If the car that made these skid marks can decelerate at –9.8 m/s2, how fast was the car going before braking?

81. ## physics

A man whose mass is 70 kg walks up to the third floor of a building. This is a vertical height of 12 m above the street level. (a) How many joules of work has he done? (b) By how much has he increased his potential energy? (c) If he climbs the stairs in 20

Suppose you have 168 meters of fencing with which to make two side-by-side rectangular enclosures against an existing wall. If the rectangular enclosures are adjacent and of the same depth, what is the maximum are that can be enclosed?

83. ## chemistry

Given the following reaction and enthalpy change, calculate the amount of heat for converting 100.4g of liquid water (18.02g/mole) to a vapor? delta H= +44kJ

84. ## physics

Suppose you need to measure the mass of an object, but have only a 7-kg standard mass and a meter stick. Place a knife edge under the 50-cm mark of the meter stick. Then put the 7-kg standard mass at the 39.1-cm mark and place the object so as to balance

85. ## Social Studies

How do you think the founders of the roman republic would have viewed the roman empire

86. ## Math

How are cube and a rectangular prism alike? How are they different?

87. ## Physics

A 6.5- bowling ball and a 7.1- bowling ball rest on a rack 0.80 apart. Part A- What is the force of gravity exerted on each of the balls by the other ball? Part B- At what separation is the force of gravity between the balls equal to 2.2×10−9 ?

88. ## Physics

A 8.0×10−2- toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of 1.30 in a horizontal circle of radius 0.49 , as illustrated in the figure . Find the angle the string makes with the

89. ## English

I am writing a comparison essay how Miley cyrus song the climb argument is better than katy perry fireworks. I need help finishing my conclusion. my thesis restated is: Miley Cyrus's argument for how every person is an individual is more compelling than

90. ## Science

Technology has been used for centuries to study the ocean. Trace the history of one piece of technology. What do you think is the most important technology to study the ocean? And why do you think so?

91. ## english

my comparison essay introduction paragraph. can someone help me think of what to wrtie before the "an analysis...." i just need a general idea of what to write because im stuck. here the intro: Miley Cyrus song “The Climb” is not only one of my

92. ## Chemistry 121

How many grams of KCl would be produced from the complete decomposition of 2.75g of KClO3?

93. ## math

At 5:00 a.m. the temperature in Orlando, Florida was already 80 degrees F. By 3:00 p.m. the temperature had risen to 97 degrees F. What is the difference in the temperatures?

94. ## maths

write the square root of 32as a power of 2 and hence solve the equation 16to the power of x-1=2 square root of 32

95. ## Cal 1

A trough is 10 ft long and 2.6 ft across the top. Its ends are isosceles triangles with an altitude of 2.1 ft and vertex down. Water is being pumped into the trough at a rate of 2.4 ft3/min. How fast is the water level rising when the water is 1.39 ft

96. ## physic

Average Speed 1. In the 2008 Summer Olympics, Usain Bolt won the 100-m race in 9.69 s. What was his average speed? 2. Light from the sun reaches Earth in 8.3 min. The speed of light is 3.0108 m/s. How far is Earth from the sun? 3. In Major League Baseball,

97. ## Trigonometry

A ship travels S 62 E and for 48 km and then turns and travels N 28 E for 37 km.

98. ## Chem 152

if x moles of PbCl2(s) dissolve in 1.00L of water, how many moles of Pb2+(aq) are produced? how many Cl- produced?

99. ## Social studies world history

What are the similarities between the northern and middle colonies. I only have one by far seeking relgios freedom but may anyone tell me more? And some similarities if you can about southern and middle colonies. Please and thank-you!

100. ## physics

A 700-N girl jumps from a balloon 36.0 m above the ground, and is brought to rest (instantaneously) 4.00 m above the ground by an elastic cord attached to the balloon. (a) Is the girl’s acceleration upward, downward or zero at this time? Explain. (b) If

101. ## math ( algebra 2 )

a newspaper company currently charges $11 a week to its subscribers, but is considering raising their price. the company found that the weekly revenue y can be modeled by the function y= -750(x-40)(x+20) where x is the number$.50 increases in the weekly

102. ## maths

solve the simultaneous equations: y=x-2 ysquared+xsquared=10

hello, I'm helping my son with his assignment but unsure if the answer is correct. Please help advise. Milton needs to find the product of two numbers. One of the numbers is 9. The answer also needs to be 9. How will he solve this problem? Explain. 3 x 3 =

104. ## Physics

When you take your 1000- car out for a spin, you go around a corner of radius 57 with a speed of 19 . The coefficient of static friction between the car and the road is 0.88. Assuming your car doesn't skid, what is the force exerted on it by static

105. ## Physics

Find the linear speed of the bottom of a test tube in a centrifuge if the centripetal acceleration there is 5.1×104 times the acceleration of gravity. The distance from the axis of rotation to the bottom of the test tube is 7.7 .

106. ## calculus

at what point is the function y=cos/(5x) continuous?

107. ## English Composition

What makes Z.Z. Packer's "Every Tongue Shall Confess" difference from other short stories?

108. ## Math

Stacy requires $3,000 in three years to make a down payment on a new car. She will receive 8% compounded annually for the three years. How much must she invest today to have the$3,000 in three years? (a) $2,381.49 (b)$ 2,419.35 (c) $2,000.00 (d)$

A tortoise can run with a speed of 16.0 cm/s, and a hare can run exactly 25 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.00 min. The tortoise wins by 20.0 cm. (a) How long does the race take? (b) What is the

The agricultural revolution occurred at different time and in different places around the world. In most regions it happened in river valleys, as it did in the Near East. Focus your attention on the similarity of the locations of Mesopotamia and Egypt. Why

111. ## Math

Factor the trinomial. If the trinomial cannot be found, say so. 11m^2 + 14m - 16 I just want to make sure...would the answer be (11m-8)(m+2) ?

112. ## math

a runner time in the 100 meter dash is 32second when rounded to the nearest whole number. Name the fastest and slowest time in decimal to hundredths.

113. ## physics

A projectile of mass 0.550 kg is shot straight up with an initial speed of 22.0 m/s. (a) How high would it go if there were no air friction? I get 24.7m for this. (b)If the projectile rises to a maximum height of only 13.6 m, determine the magnitude of the

114. ## science!

1. A plane accelerated from a speed of 2.0 m/s at the rate of 3.0 m/s2 over a distance of 530 m. What is its speed after traveling this distance? 2. A jet plane must achieve a velocity of 71 m/s for takeoff. From rest and with a 1,000 m long runway, what

115. ## sci

1. A penny is dropped from the 82nd Floor Observatory of the Empire State Building. The penny will fall from a height of 320 meter (1,050 feet). (a) How long will it take to fall? (b) How fast is it going when it hits the ground? 2. Aim the Mythbuster’s

116. ## Chemistry

a chemist wanted to make 100 grams of SO2. She had only 12 grams of sulfur and 4 grams of oxygen. Unfortunately, the amounts of reactants were not enough to make the desired product. How much S and O2 would she need in order to obtain the desired grams of

117. ## physic

Block _____ Name ________________________________________ Date __________ Average Speed 1. In the 2008 Summer Olympics, Usain Bolt won the 100-m race in 9.69 s. What was his average speed? 2. Light from the sun reaches Earth in 8.3 min. The speed of light

118. ## physics

Your electricity usage for a one month period is 500 kilowatt-hours. Assuming one month is equal to 30 days and that the electricity usage is uniform across the whole month, what would be the velocity of a 1 kg mass if it was given the kinetic energy

119. ## Physics

A projectile of mass 0.800 kg is shot straight up with an initial speed of 28.0 m/s. (a) How high would it go if there were no air friction? (b) If the projectile rises to a maximum height of only 26.8 m, determine the magnitude of the average force due to

120. ## geometry

You have 32 feet of fencing and want to determine the maximum area that can be enclosed with the fencing to make a flower garden. You do not want to deal with fractions or decimals, so you are limiting the dimensions to whole numbers. Also, the area is to

121. ## physics

(a)Calculate the work done by moving a 50 kg mass along each of the legs of the path shown below. What is the total work expended when going along the entire path? Show all work. Don't just state any obvious results, if any. AB= 5m BC= 10m CD= 19.14m DA=

122. ## Mathematics

The firts terms a of an A.P is equal to twice the common difference d.Find, in term of d, the 5th term of the A.P.

123. ## Algebra ii

A 1.25 m long pendulum swings 5.75 degrees on each side of the vertical. Find the length of arc traveled by the end of the pendulum.

124. ## math

Write in expanded form. 7.37 Is this the correct answer? 7+3/10+7/100

125. ## Chemistry

Sorry Dr. Bob, I wsa looking for the Sucrose, not all 16 calculations. Can you help me with the Sucrose? I have 93.954 mL of a generic cola solution. The solution contains: Molarity of H++1.005e-7 Molarity of OH- = 1.005e-7 Molarity of Sucrose(aq) =

126. ## chemistry

Write a formula for the compound that forms from potassium and acetate.

127. ## Algebra II

A capstan on a magnetic tape drive rotates at 3600 rad/min and drives the tape at a speed of 45.0 m/min. Find the diameter of the capstan in millimeters

128. ## Math

If gas cost $3.97 per gallon, what is the cost of filling a 13.8 gallon gas tank? Do I multiply this? Is$54.78 the correct answer? Thank you

129. ## English

I included a few more sentences I need you to check. Thank you very much for your help. 1) He likes zapping/switching channel/changing channel/zooming/trolling Do they have the same meaning? 2) Even in very large cities like London the majority of people

130. ## math

blank times 14=a where a is greater than 100

131. ## Physics

Find the centripetal acceleration at the top of a test tube in a centrifuge, given that the top is 4.5 from the axis of rotation and that its linear speed is 76 .

132. ## science

How did Archimedias prove mathematically that salt water and diving were related to buoyancy?

133. ## College math

Can you explain to me how to write 1/3 as a percent?

134. ## Math

How many compounding periods are in a 5 year loan compounded semiannually? (a) 10 (b) 5 (c) 2.5 (d) 15 (e) 20

135. ## Math

How many compounding periods are in a 5 year loan compounded semiannually? (a) 10 (b) 5 (c) 2.5 (d) 15 (e) 20

136. ## Math

Find the future amount after one year on $2,000 at 5% compounded annually. (a)$ 200 (b) $100 (c)$ 2,100 (d) $400 (e)$ 550.00

137. ## calculus

f(x)=(1+x) what is f'(x) when x=0

138. ## calc

Use the Mean Value Theorem to show: -x < sinx < x for all x > 0 (and where I have the inequalities, it's supposed to be less than or equal to for the first two and greater than or equal to for the last one, I just didn't know how to type it)

139. ## MATH

Assume that the population of heights of male college students is approximately normally distributed with mean of 72.83 inches and standard deviation of 6.86 inches. A random sample of 93 heights is obtained. Show all work. (A) Find the mean and standard

140. ## calculus

Lim (1+(a/x))^(bx) x->infinity I'm having a lot of trouble with this limit.

141. ## math

What are constants? Please give me an example...

142. ## geometry

On a graph, the points (4,-2),(7,-2),(9,-5) and (2,-5) are connected in order to form a trapezoid. To the nearest tenth, what is its perimeter?

143. ## Chemistry

n our text book the following equation is given: P=(pm - p)g * R where P is the pressure drop R is the manometer reading pm is the density of the manometer fluid p is the density of the process fluid in the pipe g is the acceleration do due to gravity Then

144. ## Math

Solve the equation 40^2 + 4a = 0 What I did was 4a (10a + 1) = 0 then I'm not sure what to do next...

145. ## calculus

let f(x)= 9(x/(x-1)square)= 9x/ x square-2x+1 find the domain of f and compute the limit at each of its endpoint. then list all horizontal and vertical asymptotes

146. ## english

do anyone know where i could get information on roles and experiences of women in afghanistan (under Taliban rule) - position in society (economy, politics, religion). also from a reliable website and i am able to reference on my work cited list

147. ## chemistry

a sample of carbo (12.5g) abosorbs 888J of heat its temperature changing form 27.0 C to 127 C . Calulate specific heat of Carbon

148. ## chemistry

a sample of carbo (12.5g) abosorbs 888J of heat its temperature changing form 27.0 C to 127 C . Calulate specific heat of Carbon

149. ## Science

How much work does the hiker do if he uses 800 n of force to walk 100 meters?

150. ## Math

the time x (in days), that it takes a planet to revolve around the sun can be approximated by the equation x=0.407√(d^3),where d is the mean distance of the planet from the sun in millions of miles. It takes Venus approximately 226 days to complete one

151. ## AP Physics b

Design a carnival ride on which standing passengers are pressed against the inside curved wall of a rotating vertical cylinder. It is to turn at most at 1/7 revolution per second. Assuming a minimum coefficient of friction of 0.10 between clothing and

152. ## Chemistry

Which equation does not fit the definition of oxidation? 1. Na ® Na+ + e- 2. C2H6 ® H2 + C2H4 3. C + O2 ® CO2 4. Ag+ + e- ® Ag Can some one help. I do not know which one. I am working on a practice test and there are no answers in the back of the book.

153. ## probability

One container contains 6 red and 4 white balls, while a second container contains 7 red and 3 white balls. A ball is chosen at random from the first container and placed in the second. Then a ball is chosen at random from the second container and placed in

154. ## Math,fraction word problem

a total of 9litres of orange syrup was poured equally into 6jug. Susan poured 2over5 litres of orange syrup from a jug into a glass&drank it.she found the syrup too sweet,so she added 4over5 litres of water into the jug she had.find the total amount of

155. ## math

How does a constant relate to an expression?

156. ## Economics

Explain why quotas are more effective than tariffs. Thanks! :)

157. ## Chemistry

I have 93.954 mL of a generic cola solution. The solution contains: Molarity of H++1.005e-7 Molarity of OH- = 1.005e-7 Molarity of Sucrose(aq) = 6.386e-1 Molarity of Dye= 5.322e-3 Calculate the mass percent, molarity, molality and mole fraction.

158. ## geometry

P (3, 3) and Q (4, 8). Which is the distance from P to Q

159. ## chemistry

how many hydrogens would there be in 2,5,6 trimethylnonane and how do you find them

160. ## Math: Intro to Proofs

Given: Let f: X -> Y be a function. Then we have an associated function f^(-1): P(Y) -> P(X), where f^(-1) (B)⊂X is the inverse image of B⊂Y. Question: Show that f^(-1) is one-to-one if and only if f is onto. [Notes: ⊂ represents subspace, I just

161. ## trig

y= -(x-5)2 -3

162. ## physics

A body slides down a curved track which is one quadrant of a circle of radius R. If it starts from rest at the top of the track and there is no friction, find the speed at the bottom of the track is R equals 5 m.

163. ## Algebra 2

A boat has a 10 gallon gasoline tank and travels at 20mi/hr with a fuel consumption of 16mi/gal when operated at full throttle in still water. The boat is moving upstream into a 5mi/hr current. How far upstream can the boat travel and return on 10 gallons

164. ## Stats

I'm having some trouble with a stats portion of an animal behavior lab. We have to do chi-sqaure tests to test 3 hypothesis, which are 1) percent prey captured will decline as prey group size increases 2) percent successful hunts will decline as prey group

Given: Let f: X -> Y be a function. Then we have an associated function f^(-1): P(Y) -> P(X), where f^(-1) (B)⊂X is the inverse image of B⊂Y. Question: Show that f^(-1) is one-to-one if and only if f is onto. [Notes: ⊂ represents subspace, I just

166. ## Algebra

x/4 - y/2 = -11/4 x/4 + y/2 = 1/4 solve the system

167. ## Chemistry 121

How much oxygen would be needed to completely burn 250g of propane?

168. ## english

for my comparason essay. now that i have finished every paragraph except the conclusion paragraph. so far i got: Miley Cyrus’s argument for how every person is an individual is more compelling than Katy Perry’s argument to just express your self. The

169. ## chem

what is not a function of specific rotation temperature concentration wavelength

170. ## english

for my comparison essay i have finish the conclusion paragraph. can someone edit it or improve it if possible. also do anybody know how i could conclude my essay. here the paragraph: Miley Cyrus’s argument for how every person is an individual is more

171. ## Chemistry

This question seems too simple to me but i was just wondering if someone could help me with it? 8 a) Explain why the first ionisation energy values for the Group 1 elements become less positive as you go down the group? I have done this part it's b which

172. ## Social Studies

Why did the first americans migrate to the amercias. Where did they come from and what were they following? I really don't need a huge history about this qs. I just need to write 2-3 sentences to answer this qs. Please help me I really don't get this.

173. ## Math

(c^6/7 q^5/7)^4/7 To solve would I add the 6+7=13 (cq^13)^4/7 then i end up with cq^28561 I think I am missing something

174. ## Math

28% of what number is 3 1/2 ? Is 12.50 the answer?

175. ## world history

In the eleventh and twelfth centuries, the Song Dynasty had all of the following characteristics except

176. ## Math

Use the present value formula to compute the amount that should be set aside today to ensure a future value of $2,000 in 1 year if the interest rate is 12% annually, compounded annually. (a)$ 1,776.97 (b) $1,765.89 (c)$ 1,785.72 (d) $1,786.97 (e)$

177. ## English

I'm posting you the ones I'm most doubtful of. 1) Where can I find a complete list of uncountable nouns in English? 2) What kind of television programmes do you like watching? I like watching current affairs programmes so I can keep up to date with what

178. ## Math-System of Equations

1. Solve for x, y, z in the following system: 2x-3y-2=z y-x+z=1 -y-2z=7 The answers are: x=-7 y=-5 and z=-1 however I don't know how to go about this.

179. ## Sentences

Are my sentences correct with the following directions? (Sentences below directions) Using California as a topic, number and write one example of each of the following: 1. A completely correct simple sentence with an appositive in it. 2. A sentence with

180. ## Chemistry

9. Iron is produced by reducing iron(III) oxide with CO: Fe2O3 + 3 CO → 2 Fe + 3 CO2 ∆H = –23 kJ . How much heat is produced when 1.00 kg of Fe2O3 are reduced?

181. ## grammar

James walked to the park. Is the predicate "walked to the park" or just "walked?"

182. ## computer science 104

Create a method areaOfaTrapeziod when given a, b, and h (all doubles), will return the area (double) of a trapezoid. Use the equation pictured below In the code, i should 1. Create the prototype for the method 2. create the method 3. call it from the

183. ## Calculus

Answer the following questions for the function f(x) = sin^2(x/3) defined on the interval [ -9.424778, 2.356194]. Rememer that you can enter pi for \pi as part of your answer. f(x) is concave down on the interval ? Please help, im REALLY stuck.

184. ## to Katie A A

#1 - The school subject is MATH, not "help" -- I've never heard of a school subject called help. #2 - To quote one of our very good math and science tutors: “You will find here at Jiskha that long series of questions, posted with no evidence of effort or

185. ## MATH

What are the factors of 65

186. ## chemistry

calculate the quantity of heat (cal, J) required to change the temperature of 1500g water from 25C to 75C. do i have this right 1500 X 4.18J/g C X 50C = 313500

187. ## General Chemistry 1

What is the FBF bond angle for BF^4- ?

188. ## Algebra 1

First of all, we're learning how to solve equations with variables on both sides. Write and solve an equation for the situation. An architect is designing a rectangular greenhouse. Along one wall is a 7-ft storage area and 5 sections for different kinds of

189. ## algebra

order from least to greatest. -1/4, -2/3, 7, -8, 9

190. ## math

out of 150 students, 20% of them earned straight A's. how many students earned straight A's?

191. ## Chemistry

A stock solution is prepared by adding 20mL of 0.2M MgF2 to enough water to make 80mL. What is the F– concentration of 20 mL of the stock solution?

192. ## math

4x-8=28. find x

193. ## science

How much potash alum is prepared by 6g Al2(SO4)3 & 1.5g K2SO4?

194. ## science

How much potash alum is prepared by 6g Al2(SO4)3 & 1.5g K2SO4?

195. ## chemistry

how do you find how many hydrogens there would be in 2,5,6 trimethylnonane?

196. ## sci

1. A penny is dropped from the 82nd Floor Observatory of the Empire State Building. The penny will fall from a height of 320 meter (1,050 feet). (a) How long will it take to fall? (b) How fast is it going when it hits the ground? 2. Aim the Mythbuster’s

197. ## URGENT Chemistry question

a chemist wanted to make 100 grams of SO2. She had only 12 grams of sulfur and 4 grams of oxygen. Unfortunately, the amounts of reactants were not enough to make the desired product. How much S and O2 would she need in order to obtain the desired grams of

198. ## PLZ ANSWER CHEM QUESTION

a chemist reacted 64 grams of Ru with O2. This reaction produced 160 grams of ruthenium oxide and 4 grams of leftover O2. How much of the reactants would this scientist need to make 320 grams of the product with no leftover O2? Ru + O2 = RuO2 + O2 leftover

199. ## Trigonometry

Add 3+ 4i and -4+2i graphically My class got 1+ 2 radical 10 /2 and 1-2 radical 10 /2 . whenever i put this into the y= graph, nothing shows up on the graph. Can someone tell me how to solve this algebraically and graphically?

200. ## help

wich of these is more heavier, 10liters of water, 10liters of oil or 10kilogrammes of gold

201. ## Calculus

If the normal to f(x)= (3x/(1+x)) at (2,2) cuts the axes at B and C, determine the legnth of BC.

202. ## English Captilization

I just want to know if i got all of these quiz questions right for captilization. Thanks 1. Which answer best fits into the blank? Drive _____ on I-270 to get to Grove City. A.South B.south C. the south I think it is B. 2. Which answer best fits into the

203. ## Pre- Algebra

Solve the equation. Be sure to show all of your work. 3x - 3 = 3

204. ## xeco 212

I need an example of the "Price Elasticity of Demand" for my economics homework.

205. ## Algebra ii

The pulley attached to the turning knob of a radio has a radius of 35 mm. How far will the needle move if the knob is turned a quarter of a revolution?

206. ## Chemistry 121

Is 450g of oxygen enough to burn 125g of butane according to the following equation? C4H10 + O2 ---> CO2 + H2O? show why or why not?

207. ## Algebra

Use slopes and intercepts to determine if the following system is consistent, inconsistent, or dependent. -4x - 5y = 20 -12x - 30y = 60

214. ## math

Dominoes pizza offers 30 different types of pizza and 9 of them contain pepperoni. what percentage of their total number of pizza types have pepperoni on it? Can someone explain to me the procedure please

215. ## mutually exclusive-PROBABILITY

Please explain to me why they are exclusive or not exclusive. Event A is that atleast three of toni's five cousins are female Event B is that atleast three of toni's five cousins are male.

216. ## English

Could you please check these sentences? Thank you. 1) Where can I find a complete list of uncountable nouns in English? 2) What kind of television programmes do you like watching? I like watching current affairs programmes so I can keep up to date with

217. ## World History

Which is the best reason vaclav havel was chosen as the first president of the czecj republic after the "fall" of communism. A. He was a well known political activist for freedom. B. He was well known for his anti-government plays. C. He was well-known for

218. ## Math

how many faces does rectangular prism have? and How many vertices does rectangular prism have?

219. ## confused

serigo has 30 gifts numbered from 1 to 30. There is a kite in each gift with a number that is multible of 4. There is a baseball cap in each gift with a number that is multiple to 6. Which gifts have a kite? Which gifts have a baseball ? Which gifts have

220. ## math

blank times 24=B where B is less than 100

221. ## math

blank times 24 equal b where b is less than 100

222. ## math

a phone company wants to create some new area codes. each area code will be 3 numbers . using the digits 1,5,and 7 only once in each code, how many codes can the phone company create?

223. ## math

the lappans buy three large sandwich wraps to serve at a picnic. nine people in all will be at the picnic. showthree different ways to cut the sandwich so that each person gets an equal share

224. ## math

what is the pattern of 6 starfish with 5 arms each.

225. ## chem

does (aq) mean a precipitate or (s) Ie BaCl2(aq) Mg(OH)2

226. ## English

Can someone let me know if these answers are right? Thanks in advance! Questions 1-7 all have the same format and answer choices. The answer choices are fully explained here, but they are in shortened versions in the remaining questions. Although you do

How do you write 9% in a decimal form? Is it x's 100? Is 0.09 the answer?

236. ## Equation Help

In our text book the following equation is given: P=(pm - p)g * R where P is the pressure drop R is the manometer reading pm is the density of the manometer fluid p is the density of the process fluid in the pipe g is the acceleration do due to gravity

237. ## statistics

For a single sample t-test we don't need to know.................of the population, instead we will have access to the ............of the sample.

238. ## Math

serigo has 30 gifts numbered from 1 to 30. There is a kite in each gift with a number that is multible of 4. There is a baseball cap in each gift with a number that is multiple to 6. Which gifts have a kite? Which gifts have a baseball ? Which gifts have

239. ## Elememtary Math

(c)squared-2c+6, for c = 4 I replaced all c's with 4 and my answer is 14. Am I correct.

240. ## chemistry

How much heat is absorbed by the calorimeter if the temperature change is 10 C and the calorimeter constant (Heat Capacity) is 3.3 J/K?

241. ## Chem

middle-aged man has been diagnosed as being at high-risk of developing Coronary Artery Disease. •State the chemical composition of the sterol that is present in high levels in most people who belong to the high-risk group. •Distinguish between the

242. ## apa format

when doing references for a paper-do we include all the page numbers (the whole article) or just the page number that I'm citing from

243. ## Physics

If t is 04.00s, then what is the percentage uncertainty in t^2?

244. ## physics

a 1540 kg truck is traveling at 95 km/hr. what average force is required to stop in 10 seconds

245. ## Maths

A boy cycled from his home to a friend's house 24km away at an average speed of 16km/h. Finding his friend absent, he returned home immediatly at an average speed of 12km/h. Find the average speed I know how to find the average speed, just that I need to

246. ## SCIENCE

Conservation of natural resources could include- A. the use of more renewable sources of energy B. cutting down on the use of fossil fuels C. replacing soil and planting trees D. all of the above

247. ## physics

c) Find the height of the rock after 10.1 seconds

How do you simplify problems like 8x + 3 (7x-6) -9(4x-8) + 2x? Please help!! Thank you!

249. ## chemistry

calculate the quantity of heat (J) which flows froma 125g sample of magnesium as it cools from 650K to 300K

250. ## social

Why did christianity become the religion of western civilization?

251. ## calculus

Find the inflection points of f''(x)= x(x+1)(x-2)^2. Explain

252. ## Basic math

Find the median of the numbers 3, 6, 10, 12, 27, 62 How do I answer this?

253. ## geometry

what is a similiar triangle to one that has a perimeter of 16 inches and an area of 43 square inches

254. ## math

solve 7^(11/13) would the answer be 7^-2 don't you subtract the Poweras or is it 2/7?

255. ## arithmetic

on a ruler where is the 32nd?

256. ## SCIENCE

Most electricity is produced using fossil fuels. Some people think electricity should be produced using resources such as wind,water,and solar energy. Why might people have this opinion?

257. ## Nutrition

how do you determine the total lethality (in equivalent D250 minutes) of a thermal process?

258. ## Economics

Explain how the emergence of the global marketplace has been linked to increased integration of the world’s economies. I think globalisation is involved, how can I structure my answer? Thanks!

259. ## Chemistry

My mobile phase for HPLC (High Performance Liquid Chromatography) test consists of 3 components in the ratio 5:250:745. In preparing the mobile phase, is it advisable to first measure 745ml of component A, followed by 250ml of component B and lastly 5ml of

260. ## Accounting

Present value analysis-cost of capital National Leasing is evaluating the cost of capital to use in its capital budgeting process. Over the recent past, the company has averaged a return on equity of 12% and a return on investment of 9%. The company can

261. ## english

Most people need a budget, a plan for keeping track of their income and expences. is the comma in the right place?? thank you

262. ## english

for my comparison essay i am analysis of the 2nd device for katy perry song fireworks.. i need help explaining this line into details. could somebody give me like at least 1-2 sentence explaining it. the device im using is imagery and the line is:“After

263. ## English

When do you use "will" to make an offer or request? 1) Will you have a sandwich? Will you do me a favour? 2) Will you want me to (is not possible) 3) I need other examples. 4) Will you have your children picked up from school(is not possible)

264. ## math146

equation for subtract the result in C form the result in A ... is it C - A

265. ## to Ms. Sue

I would like to thank you Ms. Sue I am starting to understand Distributive property more now. I didn't really understand was because the subsitute didn't really explain it that well. So thank you!!!! :-) :)

266. ## Physics

A football bobble-head figure sits on your car dashboard. The 83-g head of the figure is attached to a spring with a spring constant of k = 21 N/m. You are driving along a straight road when you notice a series of hoses lying across the road, perpendicular

284. ## math

a savings account has increased over a 12 month period from 8765 to 9006.04. No deposits or withdrawals were made. What percent interest did he receive in a 12 month period

285. ## MATH

0.11966667 round to the tenths would it be 0.120

286. ## math

tony want to be a magician but the book said she needed to learn at least 100 magic tricks. if he learns 14 tricks each week how long willit take him to learn 100 magic tricks?

287. ## Algebra ii

Find the latitude of a city that is 1265 mi from the equator.

288. ## Algebra 1

What is the answer to 10-3x is less than or equal to 7x? I tried the problem, but I keep getting x is less than or equal to 1. Is that right?

289. ## chemistry

a sample of iron (35.0g) absorbs 5.50J. of heat. calculate the increase in temperature that occurs

290. ## chemistry

a complex apparatus has heat capacity 891J/c . calculate the heat absorbed by the apparatus to change its temperature by 1.3 C