# randy

Popular questions and responses by randy
1. ## 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!

2. ## chemistry

The conversion factor relating miles to meters is 1 mile= 1610m The speed of light is 3.00×10^8 m/s. How fast is this in miles per hour (miles/h \rm miles/h)?

3. ## Algebra II

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

4. ## Math

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

5. ## 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.

6. ## algebra

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

7. ## 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

8. ## math

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

9. ## 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.

10. ## Geometry

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

11. ## 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.

12. ## 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

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. ## math

How many thousands of people live in Boston ma.if population is 617,594

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. ## ALGEBRA

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

17. ## Trig / Calc

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

18. ## ALGEBRA

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

19. ## physics

A log is floating on swiftly moving water. A stone is dropped from rest from a 84-m-high bridge and lands on the log as it passes under the bridge. If the log moves with a constant speed of 3.6 m/s, what is the horizontal distance between the log and the

20. ## physics

a boy of mass 40kg and a girl of 30kg play on a see saw of negligible weight.if the boy sits 270cm from the pivot of the see-saw where must the girl sit to make it balance

22. ## chemistry

A sprinter set a high school record in track and field, running 200.0 m in 20.9s . What is the average speed of the sprinter in kilometers per hour

23. ## 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

24. ## Pre-Cal

Given that lim x-> f(x)=6 and that lim x-> g(x)= -4, evaluate the following limit. Assume that c is a constant. lim -2f(x) - 12 / g(x). x->. I did -2(6) - (12/-4) -12 - (-3) -12 + 3 -9

The number with the most digits is always greatest. Do you agree? Explain. Explain how you use a hundred chart to subtract 12 from 46.

26. ## Science

Nathaniel is driving his sports car down a four lane highway at 40m/s. He comes up behind a slow moving dumptruck and decides to pass it in the left hand lane. If Nathaniel can accelerate at 5m/s^2, how long will it take for him to reach the speed of

36. ## physics

A ball is thrown straight upward and returns to the thrower's hand after 2.75 s in the air. A second ball thrown at an angle of 34.0° with the horizontal reaches the same maximum height as the first ball. (a) At what speed was the first ball thrown? ____

37. ## Math

Write whether the statement is true or false. If false write a true statement. 1. A right triangle has three right angles. False a right triangle has 1 right angle 2. A triangle that has three sides of the same length is an equilateral triangle. True

38. ## 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

39. ## Physics

Multiple-Concept Example 13 presents useful background for this problem. The cheetah is one of the fastest accelerating animals, for it can go from rest to 34.7 m/s in 3.03 s. If its mass is 102 kg, determine the average power developed by the cheetah

40. ## chemistry

the heat of fusion of water is 335 J/g. How much heat would be required to melt 97.8 g of ice

41. ## ALGEBRA

6y + 11x = -9 (a) Solve the equation for y. (Do not use mixed numbers in your answer.) y =

42. ## 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

43. ## geometry

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

44. ## physics

An automobile starts from rest and accelerates to a final velocity in two stages along a straight road. Each stage occupies the same amount of time. In stage 1, the magnitude of the car's acceleration is 2.03 m/s2. The magnitude of the car's velocity at

45. ## Pre-cal

Please determine the following limits if they exist. If the limit does not exist put DNE. lim 2+6x-3x^2 / (2x+1)^2 x-> - infinity lim 4n-3 / 3n^2+2 n-> infinity I did lim 2+6x-3x^2 / (2x+1)^2 x-> - infinity (2+6x-3x²)/(4x²+4x+1) (2/x² + 6/x -3)/(4 + 4/x

75. ## 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)

76. ## ALGEBRA

Consider the following expression. $$x + 2 y - 2 z$$ - (x - 2 y + 2 z) (a) Simplify the expression.

77. ## ALGEBRA

Find the functional values requested in the problem. h(x)=3 x-1 (a) h(0) = (b) h(-7) =

78. ## ALGEBRA

Solve the exponential equation. Give the exact value for x. (Express all logarithmic functions in terms of ln(x) in your answer.) text((a) ) e^x = 10 x = text((b) ) e^x = 2.0 x = text((c) ) e^x = 37.9 x =

79. ## ALGEBRA

Graph the equation. x = -6

80. ## ALGEBRA

The velocity v (in feet per second) of a rock dropped into a well is related to time (in seconds) by the formula v = 32t. What is the velocity of the rock at the indicated instant? Write your answer in the form (t, v). (a) when the rock is released ( , )

81. ## 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

82. ## ALGEBRA

Solve the equations. ((a) ) (2 L)/(5) = 2 L = ((b) ) 4 = (4 M)/4 + 8 M =

83. ## ALGEBRA

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

84. ## 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 )

85. ## 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.)

86. ## ALGEBRA

x2 - 5x + 5 = 0

87. ## ALGEBRA

Let x = 1, y = 3. Find the value of the given capital letter. N = x**2 + 2 xy + y**2 + 3

88. ## ALGEBRA

Find three ordered pairs that satisfy the equation. y = 5 x - 4 (0, ), (1, ), (2, )

89. ## Trig.

What is the trigonmetric fact for sin 3.14/8?

90. ## math

A student invests two sums of money at 3% and 4% interest, receiving a total of \$110 in interest after 1 year. Twice as much money is invested at 4% than at 3%. Find the amount invested at each interest rate. Where do I even begin with this?

91. ## math - integers

5. Robert, a real estate agent, drove 170 kms north from his home. The following day, he drove 54 kilometers south. How far and in what direction did he have to drive to get back home?

92. ## math - integers

1. Freddy lives 34kms south of Makati City while Misael lives 34kms north of Makati City. How far is Freddy's place from Misael's place?

93. ## math

what is the length of a diagonal of a square whose side measures 6cm.?

94. ## math

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

95. ## Biology

the biome with the fewest seasonal changes is?

96. ## physics

An airplane with a speed of 85.1 m/s is climbing upward at an angle of 54.4 ° with respect to the horizontal. When the plane's altitude is 759 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly

97. ## 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?

98. ## 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

99. ## life orientation

critically discuss 5 ways in which the human or enrimental problem impacts on the community within south africa