# Paula

Most popular questions and responses by Paula
1. ## Lincoln College Of New En

it has been found that 85.6% of all enrolled college and university students in the U.S. are undergraduates. A random sample of 500 enrolled college students in a particular state revealed that 420 of them were undergraduates. Is there sufficient evidence

2. ## Algebra

What inequality represents the verbal expression all real numbers less then 69? My answer is x

3. ## Chemistry

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. kPa1: 2.16 kPa2: 7.21 kPa3:12.32 [H3PO4] = ?

4. ## Chemistry

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. pKa1: 2.16 pKa2: 7.21 pKa3: 12.32 Hint: Convert

5. ## science

why does a cool, distant, supergiant star such as Betelgeuse have such a high apparent magnitude? PLEASE HELPPPPP!!!!!!

6. ## physics

Scientists want to place a 3300 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 2.2 times the radius of Mars above the surface of the planet. Here is some information that will help solve this problem: mmars =

7. ## chemistry

What is the total change in entropy when 10.0 g of ice melts at 25.0°C? DHfus = 6.01 kJ/mol The answer is 1.03 J/K but idk how to find it.

8. ## Algebra

Sis the set of prime numbers that are less than 15. My answer is 2,3,5,7,11, and 13

9. ## chemistry help

What mass of ammonium chloride must be added to a 0.500 L solution of 0.250 M ammonia to make a buffer with a pH of 9.26? Kb (NH3) = 1.8 × 10–5?

10. ## Com 425

Which of the following statements is an example of metacommunication? 1) "Lets introduce ourselves one at a time." 2) Don't call me names!" 3) I think we should take this vote to the Board." 4) Let's agree to not discuss old issues today."

11. ## chemistry

If a solution of lead iodide has [I-] = 1.1x10-4 M, what is the lead(II)ion concentration at equilibrium?

73. ## math

Write ( 1 9 ) 3 as a product of the same factor. Then find the value

74. ## finance

A quaint but well established cafe shoppe in the new hot cafe wants to build a new cafe for increased capicity it expect sales are $800,000.00 for the first 5 years, direct cost including labor and material 50% for new cafe will be totaled at$750,000.00

the perimeter of a rectangle is 56 inches> the width of the rectangle is three-fourth of the length. Find the length of the diagonal of the rectangle. please help me!!!

76. ## english

Lori and her friends went to a movie on the Fourth of July. identify the collective and compound nouns friends collective Fourth of July compound did i miss any? ty

77. ## english

Our class had a test in Spanish this afternoon. find the nouns mark concrete or abstract class concrete test concrete spanish concrete afternoon concrete?

78. ## medical terminology

what are five memory aids for the musculoskeletal system

79. ## Chemistry

In a certain reaction, 300.23 grams of solid aluminum sulfide combine with unlimited aqueous silver nitrate. How many moles of aluminum sulfide react? How many moles of each product will be produced? First of all, is the reaction a double replacement or

83. ## Math

In above triangular prism,ab=3cm,ac=4cm,bc=5cm and cd12 cm,show that triangle ABC is a right-angled triangle

84. ## Physics

David, who is 65 kg, is driving his car at a speed of 25 m/s. He sees a dog crossing the road and so he steps on the brake to avoid hitting it. His seatbelt brings his body to a stop in 0.4 s. What magnitude of force does the seatbelt exert on him?

85. ## math

130 square root to the nearest hundredth.

86. ## chemistry

When 30.0g of aluminum reacts with HCl, how many grams of aluminum chloride are formed? Al + HCl --> AlCl3 + H2

87. ## science

water in gas form is called

88. ## Physics 111-1

A wheel, starting from rest, has a constant angular acceleration of 1.8 rad/s2. In a 3.7-s interval, it turns through an angle of 52 rad. How long has the wheel been in motion at the start of this 3.7-s interval?

89. ## Material Physics

Gaseous nitrogen has a density of 1.17 kg/m3 and liquid nitrogen has a density of 810 kg/m3. [The relative molecular mass of nitrogen is 28.0] What is the mean volume per nitrogen molecule in each case? What is the mean separation between nitrogen

90. ## Algebra

A riverboat cruise line has a boat that can travel 76 mi downstream in the same time that it takes to travel 52 mi upstream. The speed of the current in the river is 1.5 mph. Find the speed of the boat in still water.

91. ## math

It is known from experience that in a certain industry 40 percent of all labour-management disputes are over wages, 40 percent are over working conditions, and 20 percent are over fringe benefit. Also, 9 percent of the disputes over wages are resolved

92. ## math

Take any number (except for 1). Square that number and then subtract one. Divide by one less than your original number. Now subtract your original number. Did you reach 1 for an answer? You should have. How does this number game work? Hint: Redo the number

93. ## algebra

9x -12 = 78. I need the steps to solve.

94. ## physics

Show that beta = 3 alpha Why a gas has two heat capacities?

95. ## biology

After a meal rich in starch, the blood with the highest concentration of sugar would be in what blood vessel? What are the 2 blood vessels containing blood with the highest concentration of oxygen?

96. ## sociology

WHy did the government of the US refused to become involved in the Rwandan genocide, but did intervence a few years later in Kosovo?

97. ## Geometry

Two ships leave San Francisco at the same time. One travles 40 degrees W of N at the speed of 20 knots. The other travels 10 degrees W of south at a speed of 15 knots. How far apart are they after 11 hours?

98. ## bearing

A ship is due east of a harbour. Another ship is also 3km from the harbour but on a bearing 042 degrees from it a. Find the distance between the two ships b. Find the bearing of the second ship from the first ship

99. ## chemistry

a thermometer containing 9.5g of mercury has broken. If Mercury has a density of 13.6g/ml what volume spilled