doug

what mountain range runs along the western coast of south america?

17 years ago

determine vertex, focus and directrix of parabola. then graph the parabola. first equation: y^2 -2x-8=0 second equation: y^2 -4y -12x= 8

17 years ago

determine vertex, focus and directrix of parabola. then graph the parabola. first equation: y^2 -2x-8=0 second equation: y^2 -4y -12x= 8 please show your work!

17 years ago

determine vertex, focus and directrix of parabola. then graph the parabola. second equation: y^2 -4y -12x= 8

17 years ago

determine vertex, focus and directrix of parabola. then graph the parabola. second equation: y^2 -4y -12x= 8 Please help me this is do 2day bc i forget to turn it in to my teacher

17 years ago

4. In the Krebs cycle (or citric acid cycle), starting with citrate, what happens? a. Organic compounds become more reduced and CO2 is produced b. Organic compounds become more oxidized and CO2 is produced c. Some organic compounds become reduced and elec...

16 years ago

5. What is meant by the term “carbon fixation”? a. The release of CO2 from glucose during catabolism b. The delivery of CO2 to an enzyme required for the production of glucose c. The production of two 3-carbon molecules from one 6-carbon molecule d. The p...

16 years ago

A mixture of acetone and ethyl acetate of unknown ratio begins to boil at 65 degrees celcius (760 torr). What is the composition of this binary mixture in terms of the mole fraction of acetone and that of ethyl acetate?

15 years ago

The engineer of a Russian nuclear submarine lurking under the Arctic Sea reports an outside pressure of 35 ATM. How deep is the submarine? Neglect ice thickness.

15 years ago

I am getting problems with my calculations. For the first part of the question I got 68 when I try another calculation I got 1. One of the method used was Degree of freedom =(r-1)(c-1). TABLE 12-7 The director of transportation of a large company is inter...

14 years ago

In a solution, the substance present in the largest amount is referred to as the solvent. Consider adding one ounce of oil to one gallon of water. Using terms, such as solute, solvent, polar, non-pola

14 years ago

from agroup of 18 kids how many ways can you choose a group of 4 to do a project

14 years ago

spent steam from an electric generating plant leaves the turbines at 120.0 C and is cooled to 90. 0 C liquid water by water from a cooling tower in a heat exchanger. How much heat is removed by the cooling tower water for each kg of spent steam?

14 years ago

A sphere has a radius of 0.20 meters and has a uniform surface charge density equal to 6.3 micro coulombs per meter squared. A second point charge has a magnitude of 0.58 micro coulombs and is 0.61 meters away from the center of the sphere. Find the magni...

13 years ago

Two trains are on the same track heading for each other they're two miles apart wondering is going 30 miles per hour the other train is going 10 miles for how many minutes will it take before they meet each other?

9 years ago

Molly wants to purchase ribbon to make bows. Red ribbon costs $1.59 per yard and gold ribbon costs $2.70 per yard. How many yards of each type of ribbon can Molly purchase if she can spend at most $20 altogether?

9 years ago

The plans for a building you're working on call for the installation of a 10″-thick concrete block wall. The usual size for a footing that would be used with such a wall would be 8″ deep by _______ wide. A. 18″ B. 16″ C. 24″ D. 20″ Is it C?

6 years ago

Everything in brackets are my answers. Are these correct? 1. A carpenter needs to attach a piece of small, decorative molding to an oak staircase. Which of the following tools would be the best choice for this job? A. Light-duty nailer B. Framing nailer [...

6 years ago

Determine the number of board feet required for joists on a one-story house 30′ × 40′, in which 2 × 8 joists will be placed 16″ OC. A. 2,052 B. 1,224 C. 1,632 D. 1,536 I honestly don't know what formula to use for this. Everything I see online leads me to...

6 years ago

9. A carpenter needs to determine how many plywood subflooring panels will be needed for a particular job. The area that needs to be covered measures 24′ × 48′. How many 4 × 8 plywood subfloor panels would be needed to cover this area? [A. 36] B. 32 C. 40...

6 years ago

A carpenter is trying to calculate the number of individual risers that a staircase will contain. The total rise of the staircase will be 11′. Assuming an individual riser height of 8″, what is the minimum number of risers that will be needed for this sta...

6 years ago

1. Determine the number of board feet required for joists on a one-story house 30′ × 40′, in which 2 × 8 joists will be placed 16″ OC. A. 2,052 B. 1,224 C. 1,632 D. 1,536 I believe the answer is B. 1,224 -- 2. A 4 × 12 built-up girder is 30″. How many boa...

6 years ago

2. A 4 × 12 built-up girder is 30″. How many board feet does this girder contain? (Round your answer to the nearest whole number.) A. 107 B. 312 C. 128 D. 96 I think the answer is C.128. -- 3. Calculate the number of hours needed to frame a one-story hous...

6 years ago

A rectangular building measures 64′ in length and 32′ in width. If the wall studs will be spaced at 16″ OC, what would be the total number of studs needed for the exterior wall of this building? A. 186 B. 212 C. 204 D. 192 Would the answer be 192?

6 years ago

3. A rectangular building measures 42′ in length and 24′ in width. The four exterior walls have a sill-to-top-plate distance of 9′. How many 4 × 8 sheets of plywood sheathing would be needed to cover the four exterior walls of this building? (Note: Round...

6 years ago

Using the unit-length method, calculate the total theoretical length of a rafter if the unit rise is 18″, the span is 8′, and the total run is 4′. A. 86.52″ B. 173.04″ C. 21.63″ D. 64.89″ Is it C?

6 years ago

A carpenter needs to calculate the correct length of the wall studs for a platform-frame construction. The building will have a finished floor-to-ceiling height of 7′8½″, a 1″-thick finish floor, ¾″ furring strips in the ceiling, and ½″ gypsum board on th...

6 years ago

6. What is the length of wall studs when the finished floor-to-ceiling height is 8′, ceiling material is ¾″ thick, the finished floor is ¾″ thick, and it's framed with three plates? A. 7′9″ ***B. 8′1½″ C. 8′ D. 7′7½″ I think the answer is B. 7. A carpente...

6 years ago

Calculate the length of a collar tie for the following conditions: The collar tie is 3′ above the top plate, the unit rise of a common rafter in the roof is 10′, and the span of the building is 20′. A. 16′43/4″ ***B. 12′ 91/2″ C. 14′ D. 17′ I got the answ...

6 years ago

Two carpenters are discussing the building codes that apply to staircases. Carpenter A says that most building codes require a minimum of 6′2″ of headroom for stairways. Carpenter B says that a flight of stairs that has a vertical distance of 12′ or more...

6 years ago

carpenter is trying to determine how many squares of shingles will be needed for a roofing job. Both sides of the gable roof are the same size, and one side of the roof measures 15′ × 30′. How many squares of shingles would be needed to cover both sides o...

6 years ago

1. If both sides of a gable roof are the same size, and one side of the roof measures 15′ × 36′, how many squares of 16″ × 5/2″ wooden shingles will be needed to cover this roof? The shingles will be applied with a weather exposure of 5″. (Round your answ...

6 years ago

A single-acting swing door is 36″ wide. The door frame is made of rabbeted stock. What length should the head jamb be? A. 36 1 1/16″ B. 36 19/32″ C. 36 3/32″ D. 36 3/16″ Is it A?

6 years ago

1. The following sentence is an example of proper comma usage: “Many students anticipate spring break but, Luis looks forward to winter vacation more true or false

13 years ago

Select the sentence that is punctuated correctly. Zora’s lemon tree produces too much fruit. She gives them away therefore, to her friends and neighbors. Zora’s lemon tree produces too much fruit. She gives them away, therefore, to her friends and neighbo...

13 years ago

-4=(7x-(-1))/-8

13 years ago

Using data from the following reactions and applying Hess's law, calculate the heat change for the slow reaction of zinc with water (answer must be in kJ/mol Zn): Zn(s) + 2 H2O(l) ----> Zn^2+(aq) + 2 OH-(aq) + H2(g) (ΔHrxn = ?) H+(aq) + OH-(aq) ----> H2O(...

13 years ago

33.33333 km in 3/2 hours

8 years ago

231.u

7 years ago

I'm still not understanding.

6 years ago

Is the answer B?

6 years ago

I redid number 7 and I believe that one to be A.

6 years ago

For 6, they don't tell you the thickness of the three plates.

6 years ago

I am still not understanding.

6 years ago

The squares are 100 sq ft.

6 years ago

yo im going to trust u on this i am going to tell u guys if anonymous

5 years ago

is correct or not

5 years ago