# Todd

Popular questions and responses by Todd
1. ## Math

A trash company is designing an​ open-top, rectangular container that will have a volume of 135 ft^3.The cost of making the bottom of the container is​ $5 per square​ foot, and the cost of the sides is​$4 per square foot. Find the dimensions of

2. ## chemistry

How many kilojoules are required to melt 15g of ice at 0 degrees C, and raise the temperature of the liquid that forms to 85 degrees C?

3. ## Chem

Identify the conjugate acid-base pairs in the following reactions. (a) NH4+(aq) + OH-(aq) NH3(aq) + H2O(l)

22. ## Algebra

I need to find the slope of a ladder that is leaning against a building. The bottom of the ladder is 9 ft from the building and the top of the ladder is 16 ft above the ground.

23. ## math

I have 8 ones and 2 hundreds. I am between 270 and 280. what number am I?

____= 8+2?

60. ## math

Is 13/0 considered to be undefined?

61. ## math

i have fewer ones than tens. the value of my tens is 30.what two numbers can i be

63. ## Math

the acceleration of a particle is defined by the equation a= 4-t^2 with an initial velocity of two millimeters per second. Find the exact equation for the position of the particle if its initial position was zero.

64. ## algebra

during the first part of a trip, a conoeist travels 70 miles at a certain speed. the canoeist travles 7 miles on the second part of the trip at a speed of 5 mph slower. the total time for the trip is 5 hrs. Ehat is the speed on each part of the trip?

65. ## Calculus

x^2-5/x lim x=0^+

66. ## calculus

Find the total differential for f(x,y,z)= cos(4x+3y+2z+1)

67. ## calculus

Just doing example questions to better understand. Find all first and second partial derivatives for the function u= xy^2+x^2y

68. ## PHI 103

In the truth table for an invalid argument

69. ## calculus

find dy/dx if y= (x^5)(e^(x^4))

70. ## algebra

Marlene drive 540 miles to visit friend. drive for 3 hours then stopped for gas, then drive 4 more hours stopped for lunch. how many more hours do I drive if my average speed for trip is 60 miles per hour ? How would I write an equation?

71. ## MATH

MIKE HAS 2 MATS THAT ARE IN THE SHAPE OF TRIANGLES THE SCALE FACTOR OF THE 2 TRIANGULAR MATS IS 7/9 WHAT IS THE RATIO OF THE PERIMETERS?

72. ## math

23x17 in expanded algorithm

73. ## calculus

does the sequence a=(2n)! / n! converge? Explain

85. ## Chemistry

"A voltaic cell is constructed by immersing a strip of sillver metal in a 1.0 MAgNO3 solution and a strip of cadmium metal in a 1.0M Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge in the usual way. a. Write the balanced overall

86. ## physics

Outside air generally contains some water vapor (typically 1-2% by mass). Does it take more, less, or the same heat to raise the temperature of 1kg moist air than is needed to raise the temperature of 1kg dry air by the same amount?

87. ## physics

water 20 degrees celsius flows through a 25 mm diameter pipe at a rate of 50 liters per minute. is this laminar or turbulant flow or both?

88. ## math

250mg is equal to what percent of a gram or grams

89. ## Stats

Use this table to answer the questions. Height (in inches) Frequency 50-52 5 53-55 8 56-58 12 59-61 13 62-64 11 1. Identify the class width. 2. Identify the midpoint of the first class. 3. Identify the class boundaries of the first class. 4. Give the

90. ## physics

Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 52 kg student to accelerate downward at 9.8 m/s2, determine the upward accelera- tion of the Earth during the student’s fall. Answer in units of m/s2.

The company offers two types of sales: 1. Internet sales; 2. Store sales. The marketing research manager believes that the Internet sales are more than 10% higher than store sales. The null hypothesis would be: A. Pinternet–Pstore >.10 B.

The company offers two types of sales: 1. Internet sales; 2. Store sales. The marketing research manager believes that the Internet sales are more than 10% higher than store sales. The null hypothesis would be: A. Pinternet–Pstore >.10 B.

93. ## chemistry

The Ka of stearic acid is 1.3 x 10^-5. what is the Kb of stearate?

94. ## Physics

Block A and block B (see figure below) are forced together, compressing a spring (with spring constant k = 2220 N/m) between them 2 cm from its equilibrium length. The spring, which has negligible mass, is not fastened to either block and drops to the

95. ## math

u divided by 7 =3

96. ## Physics

A 1.10 kg} block of wood sits at the edge of a table, 0.790 m above the floor. A 1.10×10−2 kg} bullet moving horizontally with a speed of 725 m/s embeds itself within the block. What horizontal distance does the block cover before hitting the ground?

97. ## Physics

A bullet with a mass of 4.0 g and a speed of 650 m/s is fired at a block of wood with a mass of 9.7×10−2 kg. The block rests on a frictionless surface, and is thin enough that the bullet passes completely through it. Immediately after the bullet exits

98. ## Physics

A 90 kg astronaut and a 1100 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.24 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with

99. ## Physics

Fairgoers ride a Ferris wheel with a radius of 5.00 {\rm m} . The wheel completes one revolution every 31.5 s What is the average speed of a rider on this Ferris wheel? If a rider accidentally drops a stuffed animal at the top of the wheel, where does it