27. Chemistry

how many milliliters of concentrated H2SO4 of density 1.84 containing 95.6% by weight of the acid is required to prepare 5litres of battery acid of density 1.18 containing 25.2% by weight of acid?

28. English

In the story “If I Forget Thee, Oh Earth…” why did Marvin’s father take him to see the view of earth from The Colony? A. The Colony had just discovered earth as a new planet in their galaxy, and he wanted to share the exciting news. B. He wanted

29. Chemistry

Calcium oxide, or lime, is produced by the thermal decomposition of limestone in the reaction CaCO3(s) arrow CaO(s) + CO2(g). What mass of lime can be produced from 2001.2 kg of limestone?

47. Chemistry

Consider an ionic compound, MX2, composed of generic metal M and generic, gaseous halogen X. The enthalpy of formation of MX2 is ΔHf° = –799 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 157 kJ/mol. The first and second ionization energies of M

48. geometry

The endpoint of a diameter of a circle are L(-3,-2) and G(9,-6) what is the length of the radius of the circle?

49. Pre-Calc/ Trig

Find the sum of the three smallest positive values of theta such that 4(cos^2)(2theta-pi) =3. (Give your answer in radians.) LaTEX: Find the sum of the three smallest positive values of $\theta$ such that $4\cos^2(2\theta-\pi) =3$. (Give your answer in

50. Math

Jimmy opens a savings account with a $200 deposit at the beginning of the month. The account earns 4.6% annual interest compounded monthly. At the beginning of each subsequent month, Jimmy deposits an additional$200. How much will the account be worth at

51. History

What is the main reason some people believe there should not be any limits on presidential terms? A. There should be a monarch instead of a president. B. The people should decide how long a president can serve in a democracy.

52. English

Need help fixing a run on sentence. I moved to the United States when I was young ut was easy to learn English, my parents were already here, they knew English already.

72. math

if sec theta - tan theta ÷sec theta +tan theta = 1÷4 ,find sin theta

73. Pre Algebra

Translate the word phrase into a variable expression: the sum of 16 and 4 times a number

74. geometry

how does the exterior angle theorem makes sense based on the triangle angle-sum theorem? i know what both of the theorems are i just dont understand how they are 'connected'?? thanks!

75. physics

A car travels at a constant speed around a circular track whose radius is 2.87 km. The car goes once around the track in 332 s. What is the magnitude of the centripetal acceleration of the car?

76. Math: Help MEEE!!!!!!

–0.6n ≤ 9.6 n ≥ –16 n ≥ 16 n ≤ –16 n ≤ 16 I Think Its n ≤ 16, Can U Help?

77. physics

(1) A uniform meter rod 4ON has a piece of weight of 2ON attached to one of its end. What is the center of gravity of the system from the weight end? (2) two bodies X and Y start from rest and move with uniform acceleration of a and 4a respectively. If the

78. Social Studies

In what way did the Russians tsars fail to follow the example of Western European rules? A. They instituted cultural reforms B. They industrialized C. They held onto absolute power** D. They adopted more modern technologies

79. Maths

The points A(1,5) and B(9,3) are part of a triangle ΔABC. The triangle has a right angle at A and and sides satisfy AB=2AC. Find a point C such that C lies above the line AB.

98. Math

Jessica has 8 1/7 pounds of dog food. Feeds 1/7 pound per day. How many days will dog food last?

99. HELP WITH SCIENCE FAST

1. Most likely, ____ were formed when lava from the moon's interior flooded bowl­like regions on the moon's surface. (1 point) maria* highlands craters basins 2. Currently, the most supported theory of the origin of the moon is _________. (1 point)

100. Math

We are given the problem of communicating a series of symbols, each of which can take on one of 512 values at a rate of f_s =〖10〗^5 symbols/s. A) What is the required bandwidth if PCM is used with m=1? B) Repeat for PAM with m=2, if each pulse can take

101. maths

The total number of people in a survey is T. The number of males in the survey is x and the number of doctors is y. The number of doctors that are male is z. Write algebraic expressions for the following using any of the variables x, y, z and T. a. The

102. maths

(a) Find the points which divide the line joining A(1,3) and B(-4,-1) internally in the ratios: (i) 1:2 (ii) 1:1 (iii) 3:1 (b) On the same x-y axes plot the point A(1,3) and B(-4,-1) and draw the line joining them. Add the three points which you calculated

103. maths

The points A(1,5) and B(9,3) are part of a triangle ΔABC. The triangle has a right angle at A and and sides satisfy AB=2AC. Find a point C such that C lies above the line AB.

104. Math

Ten analog measurements whose bandwidth is 4 kHz are to be transmitted simultaneously through a cable by time division multiplexing using PCM. Each message is sampled at a 10 kHz rate and amplitude quantized into 128 levels. The pulses are shaped with a

105. value

Find The 6th And 5th Terms Of An A.P Whose First Term Is 6 And The Common Difference Is 7.Solution:n=6th,n=5th,(Tn=a+(n-1)d

106. Spanish

Write 2 short paragraphs describing famous people from the Spanish speaking world. Make sure to include their cultural or political significance in your discussion.

107. Math

Alex can complete a model rocket assembly in four hours less time than it takes Sean. Working together, they can complete the assembly in one and a half hours. How long would it take Alex to do the assembly working alone?

108. value

A number is picked from the set p:{2,3,4,5,___9} find the probability that the number is prime.

109. algebra 2

Traveling with the wind, an airplane travels 210 miles im 4 hours. Against the wind, it takes six hours. Find the rate of the plane in still air and the velocity of the wind.

110. social studies

What is the main idea?: The Persian Gulf War, or Operation Desert Storm, was waged in early 1991 between Iraq and a coalition of thirty-nine nations organized by the Unites States and the United Nations. Leading the coalition were the U.S., France, Great

111. Algebra

A rectangular field whose length is 33 less than four times its width needs to be enclosed with exactly 104 meters of fencing. What are the dimensions of the field?

112. pre algebra 8th

1. Frances earns a salary of $3,200 per month plus a commission of 2% of his sales. He wants to earn at least$4,000 this month. Write an inequality to find the dollar amount of the sales that will meet his goal. Identify what your variable represents. d=

113. Math

Two identical circles of largest possible area are to be cut from a 12in by 24in rectangular piece for stock. Find the amount of waste.

114. Math

What's the simplest form of 3x 1/6?

115. Math

One positive number is two more than a second number their product is 168

116. Maths

Tell a word that if we say right becomes wrong and wrong becomes right

117. math 142

1,000 are deposited into an account quarterlyâ€ƒâ€ƒfor eight years at an interest rate of 7.87.8â€‹% compounded quarterly. How much is in the account at the end of the 88 â€‹years?â€ƒ

118. English

1. She explained to me how to draw a dinosaur. 2. She explained how to draw a dinosaur to me. (Are both okay? Which one is better?) 3. Susan suggested to us a very good idea. 4. Susan suggested a very good idea to us. (Are both okay? Which one is better?)

119. probability and Stats

How can I find standard error from each of the following: a) a proportion & a sample size? b) mean, standard deviation, and sample size? c) mean & standard deviation? thank you

120. Physics

When the Sun is directly overhead, a hawk dives toward the ground at a speed of 6.09 m/s. If the direction of his motion is at an angle of 78.6 â—¦ below the horizontal, calculate the speed of his shadow along the ground. Answer in units of m/s

121. intermediate algebra

1. Two numbers differ by 8. If one-half the larger is added to one-fourth the smaller, the resulting sum is 22.Find the numbers. 2. Ten years ago a man was three times as old as his son. In 12 more years the son is three-fifths as old as his father. How

122. Algebra

- 2/5 x - 9 < 9/10

123. algebra--miss sue

I need to find and write the equation for the problem. Layla wants to but a smart phone online using a $50 discount coupon along with a 20% discount on the original cost of the phone. Layla can spend up to$150. Write an inequality to find the original

124. math

If a car agency charges 240.00 per week to rent a car plus 0.25 per mile. How many miles can you travel in one week for 385.00

125. Physics - circular motion

You approach a slight bump in the road on the highway in a car. The bump carries you into a circular (convex) vertical arc of radius 39m. A) choosing two different cars ( it is for you to choose 2 particular models, providing the mass of each), at what

126. plz sir reiny sir steve sir damon help sor bob

plz help me differentiate arccosh(x/√3) i no that from inverse heyperbolic function cosh=(x±√(x²-1) but i still dont know how to that go about it

127. Geometry

Using the notation Ta,b(x,y)=(x+a, y+b) write a translation function

128. math

If i make 45 cakes and sell 3/5 how many did i sell?...... 45Ã—3/5=?...idk.its for my daughter homework.idk even know how to do it ,let alone the answer. Thank u very much for your time.

129. Math

How many significant numbers are there in 2000? in 0.00150? p.s. I already studied it twice and i couldn't understand it. thanks!

130. Algebra

wallet contains $290 in$5, $10, and$20 bills. The number of $5 bills exceeds the number of$10 bills by 4, and the number of $20 bills is 3 less than twice the number of$10 bills. How many bills of each type are there?

131. maths

Consider the 4 points A(1,5), B(-4,6), C(0,0), D(-12,12). Find the gradients of the lines: (a) AB; (b) CD; (c) BD.

132. physical chemistry

The ice skate of a 210-pound hockey player is in contact with the ice over a 2.5mm x 15cm area. Determine the freezing point of the ice under the blade of the skate?

133. maths

Calculate the lengths of the straight lines joining the following pairs of points, leaving your answers in surd form: (a) A(1,-5), B(6,10); (b) A(4,-3), B(7,6).

134. Maths

(a) Find the points which divide the line joining A(1,3) and B(-4,-1) internally in the ratios: (i) 1:2 (ii) 1:1 (iii) 3:1 (b) On the same x-y axes plot the point A(1,3) and B(-4,-1) and draw the line joining them. Add the three points which you calculated

135. Physics - Circular motion

A domesticated pig places a 100g rubber puck on a turntable. The turntable is set at a rate of 78rpm,and the pig knows the coefficient of static friction is 0.37 between the puck and turntable surface. A) How far out from the center of the turntable can

136. african american history

how did slaves become owners of their properties.... (what did they have to do to become property owners of their property in the mid 19th century)

137. Calculus

The velocity of an object is given by v(t)=t(t^2-1)^(1/3) feet per second. Find the total number of feet traveled by the object in the time interval [0,3] seconds. (A)51/4 (B)34/3 (C)45/4 (D)51/8 (E)45/8

When you simplify: sin(pi+x)cos((pi/2)-x)-cos(pi+x)sin(x+(3pi/2)) What's the answer cause I got -2sinxcosx, which I don't know if can simplify to -2sinx But the answer key says -1 so. I'm not sure how to get that

139. Chemistry

The combustion of a hydrocarbon X (30 cm3) with 350 cm3 of oxygen at STP resulted in the formation of 440 cm3 of gaseous products. The volume of gases was reduced to 360 cm3 when the excess O2 was removed and then reduced by half when bubbled through NaOH.

140. algebra

The angles in a triangle are such that the measure of one angle is 10° more than the measure of the smallest angle, while the measure of the third angle is three times the measure of the smallest angle. Find the measures of all three angles, in degrees.

141. English

1. I find it difficult to master French. 2. I find it difficult mastering French. 3. The heavy snow made it difficult to walk on the street. 4. The heavy snow made it difficult walking on the street. 5. He believed it difficult to go abroad to study. 6. He

142. English

Has anyone done the character analysis portfolio? I have Jim as my character...but I cannot find any media, can someone find one?

143. physics

If the gravitational force F is given by F=GM1M2Ãƒ·rÃƒâ€”r.derive the dimensions of the universal constant of the gravitational G

144. Pre Algebra

Look at Arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 Describe the mistake that Arnold made.

145. agebra

The sum of two numbers is 1178. The first number is 270 less than three times the second number. What are the numbers?

The mid-point of the straight line joining A(4,-3), B(6,-2) is located at C. (a) Calculate the coordinates of C. (b) Verify your result by calculating the distances AC and BC and showing they are equal.

147. English Beowulf

How did the culture of Beowulf view pride? Why?

148. Math

A certain person burn 6.5 calories per minute while walking how many calories will be burned if that person wants for 3 hours round your answer to the nearest tenth

149. african american history

Does the fact that masters felt compelled or that it was to their benefit to recognize such "rights" indicate the limits of their hegemony over the slave

158. chemistry (charges)

just want to check if this group is neutral, R-NH2 thanks!

159. maths

Consider the 4 points A(1,5), B(-4,6), C(0,0), D(-12,12). Find the gradients of the lines: (a) AB; (b) CD; (c) BD.

160. science

A motorcyclist (with a total mass of 180kg) travels up a hill. When she starts at the bottom of the hill (altitude 32m) her velocity is 43km/h. At the top of the hill (altitude 365m) she has a speed of 115km/h. The hill is 12km long and during the journey