Randy

Popular questions and responses by Randy
1. Math

sec 7pi/4 without a calculator Find the exact answer

2. Chemistry

A selenium atom (Se) would form its most stable ion by the 1. loss of 2 electrons. 2. gain of 1 electron. 3. loss of 1 electron. 4. loss of 7 electrons. 5. gain of 2 electrons. Help please and tell me how you got the answer. Thanks!

3. Statistics

A box contains five numbered balls (1,2,2,3 and 4). We will randomly select two balls from the box (without replacement). (a) The outcome of interest is the number on each of the two balls we select. List the complete sample space of outcomes. (b) What is

4. math

the absolute value of an integer is always greater than the integer. True or False?

5. Physics

Two horizontal forces, F1-> and F2-> , are acting on a box, but only F1->is shown in the drawing. F2-> can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that

6. ALGEBRA

What are the odds in favor of drawing face card from an ordinary deck of cards? to

7. ALGEBRA

The product of two consecutive positive even numbers is 528. What are the numbers? (Enter solutions from smallest to largest.) and

8. geometry

The altitude of an equilateral triangle is 7 square root 3 units long. The length of one side of the triangle is ____ units. 7 14 14 square root 3 7 square root 3 over 2

9. chemistry

Isotonic saline is 0.89% NaCl (w/v). Suppose you wanted to make 1.0 L of isotonic solution of NH4Cl. What mass of NH4Cl would you need? Question 23 options: 1.6 g 8.1 g 8.9 g 54 g

10. Trig / Calc

What angle (in degrees) corresponds to 18.96 rotations around the unit circle? Enter the exact decimal answer.

11. geometry

Ray OX bisects angle AOC and angle AOX =42 degrees, angle AOC is: 42 degrees 84 degrees 21 degrees 68 degrees

12. Chemistry

What is the percent by mass of C in methyl acetate (C3H6O2)? The molecular weight of carbon is 12.0107 g/mol, of hydrogen 1.00794 g/mol, and of oxygen 15.9994 g/mol. Answer in units of %. Please work it out for me so I totally understand it. Thanks!

13. Word Problem

Assume that the mathematical model C(x) = 16x + 130 represents the cost C, in hundreds of dollars, for a certain manufacturer to produce x items. How many items x can be manufactured while keeping costs between $525,000 and$781,000? Thanks in advance!

14. Statistics/Probability

So I tried solving the first one and apparently failed miserably, attempted both twice and got it wrong each time and I have one submission attempt left, so any help is definitely appreciated! 1. Hotels R Us has kept the following recordes concerning the

15. physics

A golfer hits a shot to a green that is elevated 3.0 m above the point where the ball is struck. The ball leaves the club at a speed of 16.8 m/s at an angle of 30.0¢ª above the horizontal. It rises to its maximum height and then falls down to the green.

16. Physics

To move a large crate across a rough floor, you push on it with a force at an angle of 21 below the horizontal, as shown in the figure. Find the acceleration of the crate if the applied force is 400 , the mass of the crate is 32 and the coefficient of

17. chemistry

The solubility of Na3(PO4) is 0.025 M. What is the Ksp of sodium phosphate?

18. math

order the numbers from least to greatest. _ 1 4/5, 1.78, 1 5/6, 7/4, 1.7, 1 8/11 I am confused on going back and forth between decimals and fractions.

19. Chemistry

Help with lab report Need Help finishing my lab report.KNOWN VALUES ARE V OF HCL=50ML,M=2.188.V OF NAOH=55.3ML,M=2.088.INTIAL TEMP FOR HCL=22.5C,NAOH IS 23C.this is for part A: Mass of final NACL solution assuming that the density of a 1 M Nacl solution is

20. Statistics

How do frequency tables, relative frequencies, and histograms showing relative frequencies help us understand sampling distributions? A. They help us to measure or estimate of the likelihood of a certain statistic falling within the class bounds. B. They

21. physics

consider a pair of planets that find the distance between them is decreased by a factoer of 5. Show that the force between them becomes 25 times as strong?

22. Chemistry

What mass of oxygen is consumed when 1.73L of carbon dioxide (STP) are produced in the following equation. C4H8 + 6 O2 > 4 CO2 + 4 H2O please help and show your work. My answer for this problem is 11.12g/O2. I have no confidence in my answer.

23. Chemistry

What volume of carbon monoxide gas (at STP) is needed when 1.35 Moles of oxygen gas react completely in the following equation. 2CO + O2 > 2CO2 please show your work I'm having trouble with Gas Stoichiometry.

24. ALGEBRA

Select all statements that are true. (log_b$$A$$)/(log_b$$B$$)=log_b$$A-B$$ (If ) log_1.5$$8$$=x, text( then ) x**(1.5) =8. log$$500$$ text( is the exponent on ) 10 text( that gives ) 500. text (In )log_b$$N$$, text( the exponent is )N. text( If )

25. math

Ray OX bisects angle AOC and angle AOX =42 degrees, angle AOC is: 42 degrees 84 degrees 21 degrees 68 degrees

26. statistics

A USU today survey found that of the gun owners surveyed 275 favor stricter gun laws. Test the claim that the majority (more than 50%) of gun owners favor stricter gun laws. Use a .05 significance level.

27. chemistry

How many moles of Cu are needed to react with 3.50 moles of AgNO3?

28. Geometry

How do you find the coordinates of the image of J (-7,-3) after the translation (x,y) (x-4,y+6)

29. Pre-Calculous (Trig)

The Singapore Flyer, currently the world's largest Ferris wheel, completes one rotation every 37 minutes.1 Measuring 150 m in diameter, the Flyer is set atop a terminal building, with a total height of 165 m from the ground to the top of the wheel. When

30. chemistry

While in Europe, if you drive 105km 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 22.0mi/gal? Assume that 1euro = 1.26 dollars.

62. chemistry

how many grams of NaOH would be needed to make 896mL of a 139 M solution

63. chemistry

calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)

64. chemistry

calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)

65. Chemistry

the heat of fusion water is 335J/g,the heat of vaporization of water is 2.26kJ/g, the specific heat of water is 4.184J/deg/g. how many grams of ice at 0 degrees could be converted to steam at 100 degrees C by 9,574J

66. ALGEBRA

Graph the equation. x = -6

67. ALGEBRA

Use the definition of logarithm to simplify each expression. text((a) )log_(3b) $$3b$$ text((b) )log_(4b) $$(4b)^6$$ text((c) )log_(7b) $$(7b)^(-11)$$

68. chemistry

the heat of fusion water is335 J/g. The heat of evaporization of water is 2.26 kJ/g, the specific heat of ice is 2.05 J/Deg/g, the specific heat of steam is 2.08 J/deg/g and the specific heat of liquid water is 4.184 J/deg/g. How much heat would be needed

69. chemistry

the heat of vaporization of water is 2.26kJ/g. how much heat is needed to change 2.55 g of water to steam?

70. Chemistry

what volume of ammonia gas will be produced when 8.01 L of hydrogen react completely in the following equation. N2 + 3H2 > 2NH3 this stuff is so confusing because one little word seems to change the entire process for solving.

71. Chemistry

what volume of ammonia gas will be produced when 1.26L of nitrogen react completely in the following equation? N2 + 3H2 > 2NH3 Please if someone can just give me the order of operation it will be much appreciated because chemistry is just not my forte.

72. ALGEBRA

3x2 = 17x + 6

73. ALGEBRA

Consider the following expression. 3(x - 2) - 9(x**2 + 7 x + 4) - 5(x + 8) (a) Simplify the expression.

74. ALGEBRA

The Greek God Zeus ordered his blacksmith Hephaestus to create a perpetual water-making machine to fill Zeus' mighty chalice. The volume of Zeus' chalice was reported to hold about one hundred and fifty sextillion gallons (that is a fifteen followed by

75. ALGEBRA

Evaluate the given expressions (to two decimal places). (a) ) log((23.0) (b) ) log_(2) $$128$$ (c) ) log_(9) $$1$$

76. ALGEBRA

Use the definition of logarithm to simplify each expression. (a) )log_(3b) $$3b$$ ((b) )log_(8b) $$(8b)^6$$ (c) )log_(10b) $$(10b)^(-13)$$

77. ALGEBRA

Evaluate the given expressions (to two decimal places). (a) log((23.0) ((b) log_(2) $$128$$ text((c) ) log_(9) $$1$$

78. ALGEBRA

Find a simplified value for x by inspection. Do not use a calculator. (a) log5(25) = x (b) log2(16) = x

79. ALGEBRA

Contract the expressions. That is, use the properties of logarithms to write each expression as a single logarithm with a coefficient of 1. text ((a) ) ln$$3$$-2ln$$4$$+ln$$8$$ ((b) ln$$3$$-2ln$$4+8$$ (c) )ln$$3$$-2(ln$$4$$+ln$$8$$)

80. ALGEBRA

Solve the equations by finding the exact solution. ln$$x$$ - ln$$9$$ = 3

81. ALGEBRA

ln$$e$$ = ln$$sqrt(2)/x$$ -ln$$e$$

82. ALGEBRA

(1)/(2) log$$x$$ - log$$10000$$ = 4

83. ALGEBRA

Solve the equations by finding the exact solution. ln$$x$$ - ln$$9$$ = 3

84. ALGEBRA

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.4 multiplied by 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)

85. ALGEBRA

Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.21 multiplied by 10-6 watts/cm2

86. Algebra II

if y varies directly as x, if y=80 when x=32, find x if y=100

87. geometry

The altitude of an equilateral triangle is 7 square root 3 units long. The length of one side of the triangle is ____ units. 7 14 14 square root 3 7 square root 3 over 2

88. math

1. find the lateral area of a right prism whose altitude measures 20 cm and whose base is a square with a width 7 cm long. 2. the volume of a rectangular solid is 5376 cubic meters, and the base is 24 meters by 16 meters. find the height of the solid. 3. a

89. physics

A jetliner can fly 5.57 hours on a full load of fuel. Without any wind it flies at a speed of 2.43 x 102 m/s. The plane is to make a round-trip by heading due west for a certain distance, turning around, and then heading due east for the return trip.

90. physics

Relative to the ground, a car has a velocity of 14.4 m/s, directed due north. Relative to this car, a truck has a velocity of 24.8 m/s, directed 52.0° north of east. What is the magnitude of the truck's velocity relative to the ground?

91. physics

A ball is thrown upward at a speed v0 at an angle of 59.0¢ª above the horizontal. It reaches a maximum height of 8.7 m. How high would this ball go if it were thrown straight upward at speed v0?

92. physics

A speedboat starts from rest and accelerates at +1.68 m/s2 for 5.43 s. At the end of this time, the boat continues for an additional 8.16 s with an acceleration of +0.475 m/s2. Following this, the boat accelerates at -0.866 m/s2 for 7.54 s. (a) What is the

93. algebra

what is the slope of line that passes through (-3,-8) and (0,6)

94. physics

Driving in your car with a constant speed of 12 m/s, you encounter a bump in the road that has a circular cross-section. If the radius of curvature of the bump is 35 m, find the apparent weight of a 63-kg person in your car as you pass over the top of the

95. Math

What is the surface area of a right circular cylinder with base circle of radius of 5m and height of the cylinder 10m?

96. statistics

Find z such that 20.3% of the standard normal curve lies to the right of z. 0.831 0.533 -0.533 -0.257 0.257

97. statistics

Assume that about 45% of all U.S. adults try to pad their insurance claims. Suppose that you are the director of an insurance adjustment office. Your office has just received 110 insurance claims to be processed in the next few days. What is the

99. Pre-cal

Please determine the following limit if they exist. If the limit doe not exist put DNE. lim 2x^3 / x^2 + 10x - 12 x->infinity. Thanks.

100. geometry

If a rectangle has an area of 64 square units and a length of 16 units, what is its width? If necessary, round your answer to two decimal places.

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