Saturday

April 19, 2014

April 19, 2014

Total # Posts: 187

**Math**

Show 2/4 of the set. How many counters?

**AP Biology**

Why are Eukaryotes more difficult to Transform than Prokaryotes? What methods can be used to transform Eukaryotes?

**AP Biology**

What is the purpose of using a plasmid containing an antibiotic resistance gene in the transformation process?

**math**

A stone is dropped from a cliff 344 feet high. after how many seconds will it be 200 feet above the ground?

**Math, Geometry**

The percent grade of a highway is the amount that the highway raises or falls in a given horizontal distance. For example, a highway with a four percent grade rises 0.04 mile for every 1 mile of horizontal distance. a. How many feet does a highway with a six percent grade rise...

**Math, Geomertry **

A piece of a broken wheel is shown. It was taken to a machine shop to be replaced with a new “whole” wheel. Find the radius of the wheel AC=10cm, BD=3 cm and D is the midpoint of AC. Round to the nearest hundredth.

**Math, Geomertry**

Thank you

**Math, Geomertry **

A total solar eclipse occurs when the moon passes between the earth and the sun, and the darkest shadow cast by the moon, called the umbra, hits the surface of the earth. If the umbra does not hit the surface, as shown in the following figure, then a total solar eclipse is not...

**Precalculus**

Find a unit vector in the direction of the given vector. w=-i-2j Sorry I messed up it was not a one it was a i.

**Precalculus**

Find a unit vector in the direction of the given vector. w=-1-2j

**Pre calculus**

I got (1/Square root of 2,-1/square root of 2) Thanks

**Pre calculus **

Find a unit vector in the direction of the given vector. v=(1,-1)

**Pre calculus**

thank You

**Pre calculus**

P=(-2,2) Q=(3,4) S=(2,-8) PS-3PQ Find the component form and magnitude of the vector.

**Pre calculus**

For the most part, will a law of cosines always be one triangle? As in one triangle to solve?

**physics**

A car entering the freeway accelerates from 10.2 m/s with a constant acceleration of 4.4 m/s2. What is the car’s final velocity when it merges onto the highway and reaches its cruising speed 4.2 seconds later? A 28.7 m/s B 11.2 m/s C 18.5 m/s D 8.28 m/s

**PHysics XXX**

An airplane travels 330 m down the runway before taking off. Assuming that it has constant acceleration, if it starts from rest and becomes airborne in 9.00 s, how fast (in m/s) is it moving at takeoff? A 73.3 m/s B 36.7 m/s C 1490 m/s D 660 m/s

**AP Biology**

The one-pod condition (P) is dominant to the three pod condition (p). Normal leaf (L) is dominant to wrinkled leaf(l). Determine the genotypes for the two parents for all possible matings producing the following: 150 one pod normal, 147 one pod wrinkled, 51 three pod normal, 4...

**Pre - calculus**

what happens to the cosine on the right side, when its in this step cos^3x/sinx + cosxsinx^2/sinx

**Pre - calculus**

Can someone please explain how to simplify this proiblem: cotx/sec^2 + cotx/csc^2

**Math**

How does: sin^2(x) - cos^2(x) = 1 - 2cos^2(x)

**Math**

Thank You

**Math**

(cosx - sinx)^2 + (cosx + sinx)^2 = 2 Iam in this step: 2cos^2(x) + 2sin^2(x) = 2 How can I make the equation on the right equal 2

**geometry**

Given: FG (SEG) bisects BT (SEG) BO=7x-6 OT=5x+10 Prove: BO=50

**geometry**

Given: FG (SEG) bisects BT (SEG) BO=7x-6 OT=5x+10 Prove: BO=50

**math**

User: Ariana Bouillon In Course: M/J Mathematics 2 V9 ( 2820) Instructor: Mrs. Susan Lafferty 08.03 Experimental Probability Warning: There is a checkbox at the bottom of the exam form that you MUST check prior to submitting this exam. Failure to do so may cause your work to ...

**geo**

Jackson is creating a water garden surrounded by a triangular patch of grass. If the pond will take up the space indicated by the circle, how many square feet of sod will he need to complete the garden (use 3.14 for and round your answer up to the next foot)?

**Math**

How much farther did chris run on thursday than on wednesday? If he run 3 5/8 on thursday an 1 1/4 on wednesday

**math**

Mrs. Browns girls scout troop had a carwash to earn some funds. they saved 1/6 of the money. They used 1/2 of the money to go horseback riding. They then had $100 left. How much did they initially make washing cars/

** Math**

If 9m+5=2m+26, what is the value of m?

**Trig**

How do I find the exact value of sin (pi/24)?I am crying

**trig**

Do I subtract ?

**trig**

I really need help . I find this hard Steve .

**trig**

I applied the half angle formula for sin and I got the square root of 2 minus the square root of 3 divided by 2 . and for cos I got thesqurof 2 plus thesqr of3divided by 2 .

**trig**

I am not under standing could you show me ? to tell me ?

**trig**

How do I find the exact value of sin (pi/24)?

**Math**

An oil-drilling company knows that it costs $25,000 to sink a test well. If oil is hit, the income for the drilling company will be $375,000. If only natural gas is hit, the income will be $165,000. If nothing is hit, there will be no income. If the probability of hitting oil ...

**math**

what formula i need to use in solving binomial theorem and what is the first step i need to do?

**Management**

operational planning sets up work schedules, routine work procedures, and timetable

**math**

what formula use in solving or finding for the 9th term of a number in arithmetic series and sequences?

**math**

what method i need to use in solving arithmetic and geometric sequences and series?

**physics**

An engine moves a motorboat through water at a constant velocity of 22 meters/second. If the force exerted by the motor on the boat is 5.75 × 103 newtons, what is the power of the motor?

**health**

i'm pretty sure it's c.

**chemistry**

Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−3 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free carriers/cm3) in ...

**chemistry**

thanks a lot

**chemistry**

You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 490.5 ppm and is initially uniform through the thickness of the steel. The atmosphere of...

**CHEMISTRY**

You are conducting experiments with your x-ray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic x-rays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg angle, θhkl, at which you can expect to obse...

**Chemistry**

Arrange the different types of forces in order of increasing energy. Covalent, Hydrogen Bonding, Ion-Dipole, Dipole-Dipole, Induced Dipole-Dipole (induced and London dispersion), and Ionic Bonding

**physical education**

how do you know when you are growing

**math**

how i can see the exact solution of 6y-12y=12 and4x-12y=8

**English**

Headstrong

**physics**

A beam of protons is moving toward a target in a particle accelerator. This im trying to study for my exam by doing problems, however im stuck with this one. any help is appreciated beam constitutes a current whose value is 0.39A. (a) How many protons strike the target in 14 s...

**Physics**

A battery has an internal resistance of 0.42. A number of identical light bulbs, each with a resistance of 31.500, are connected in parallel across the battery terminals. The terminal voltage of the battery is observed to be one-half the emf of the battery. How many bulbs are ...

**Physic**

You must show your work for full credit.) Calculate the average speed of an oxygen molecule (with a mass of 5.3e-26 kg) at room temperature (300 Kelvin):

**Physic**

The tidal interaction between the Earth and the Moon has caused:

**Physic**

While surface conditions differ greatly, name the three ways that Venus and Earth are indeed sister planets.

**Physic**

Calculate the average speed of an oxygen molecule (with a mass of 5.3e-26 kg) at room temperature (300 Kelvin)show your work

**astronomy**

big bang theory define

**Physic**

How can we describe some object in astronomy? Can we either prove or disprove a hypothesis? If not, what can we do? How have theories developed over time?

**Physic**

How can we describe some object in astronomy? How can we interpret data? Can we either prove or disprove a hypothesis? If not, what can we do? How have theories developed over time? Explain and provide some examples.

**Physic**

Before continuing we need a little more information about the angle factor given in the formula above. It turns out that the angle factor is equal to the cosine of the angle that the light strikes the surface as measured from perpendicular. In this question, the angle factor w...

**pHYSIC**

5. Now, wait until the planet is at the winter solstice (12:00am). a) How many hours of daylight are there on the winter solstice with the inclination at 45 degrees? Use the same criteria for the length of day that you used for the previous question. b) Use the above formula a...

**pHYSIC**

Now let us consider the length of time that the Sun is visible. Wait until the planet is at the summer solstice (12:00am). a) How many hours of daylight are there on the summer solstice with the inclination at 45 degrees? To estimate the length of day, identify the time when t...

**pHYSIC**

3. Now wait until the planet is at the summer solstice (to the far left). Here the sunlight arrives perpendicular to the surface. (Note that the fact that the sunlight can be perpendicular to the surface here and parallel to the surface at the winter solstice with the same til...

**astronomy**

2. We ultimately want to find the amount of solar energy that hits the observer on the planet. Energy is usually measured in Joules, but there are other appropriate units of energy as well; kilowatt-hours for example, are used to measure the amount of electrical energy that we...

**math**

The scale factor for two similar triangles is 4 : 3. The perimeter of the smaller triangle is 12. What is the perimeter of the larger triangle

**math**

The scale factor for two similar triangles is 4 : 3. The perimeter of the smaller triangle is 12. What is the perimeter of the larger triangle

**pre-calculus**

Currently in school we're learning about proving identities and for extra credit I got this problem. cosB= -8/17 in quad II and I have to find sin 7B. I have gotten this far: sin7B= sin(3B+4B) sin3Bcos4B+sin4Bcos3B my problem I can't figure out how to further break it ...

**science**

a 110 kg person dives off a cliff and hits the water at 17 m/s. how high is the cliff?

**Chemistry**

When 3.00 g potassium carbonate (K2CO3 ) was mixed with 20.0 mL of hydrochloric acid (HCl, 4.0M) in a calorimeter, the temperature raised 3.0 degrees Celsius. B. Calculate the enthalpy change (H) of the reaction for per mole patassium carbonate. Assume the specific hea...

**health**

5-17 years old

**Math**

x^2 + 9x + 20 over x^2 -25 divided by x +4 over x - 4 How to do this really confusing i need to simplify the rational expression

**geometry**

abcd is a rectangle . find the lenght of each diagonal . ac=2(x-3) bd= x+5

**math**

-5a +[2+(3a-7)]

**math **

(-6)4-(-2)^2

**ENGLISH**

I had the main idea in both completly wrong. I thought the main idea was the half you did not underline. I am going back to figure out where I am going wrong. Thank you so much for the help.

**ENGLISH**

periodic - postpone the main idea until the very end of the sentence. They build tension for the end. cumulative - begin with an independent clause, then add in details. They provide immediate understanding of the main idea and supporting detail.

**ENGLISH**

I need to make sure I understand this. I need to rewrite each sentence twice, once as a periodic sentence and once as a cumulative sentence. To me, both look like cumulative sentences though, so I am a little confused. If someone could check my work I will be very grateful. 1)...

**ENGLISH**

Would someone please check my work. Thank you. Rewrite each sentence in an active voice 1) Mistakes were made. A)He made mistakes. 2) Musical legends such as Ray Charles, Billie Holiday, and Johnny Cash have all influenced Norah Jones A)Norah Jones was influenced by musical le...

**English**

Okay, I will keep that in mind. I appreciate the advice.

**English**

Honestly I feel like I did something wrong if I do not change the sentence in someway. I also thought it sounded better this way. How would have you written it?

**English**

Would someone please check my work. I need to combine the following sentences into one by using a semicolon. 1)Abalone fishing in California is strictly regulated. A person is allowed to harvest only twenty-four of these large mollusks per year. A)Abalone fishing in California...

**English**

Can anyone help me check my work please. I need to revise the paragraph to establish a clear antecedent for every pronoun that needs one. Original: In the summer of 2005, the NCAA banned the use of mascots that could be considered offensive to American Indians at any of their ...

**English**

I need to double check my work please. Revise to create pronoun-antecedent agreement and eliminate the generic he and any awkward pronoun reference. 1) While shopping for a new computer for school, I noticed that a laptop costs much less then they use to. A) While shopping for...

**English**

Can anyone help me with these. I need to eliminate unnecessary shifts in tense, mood, voice, or person. 1)The greed of the 1980’s gave way to the occupational insecurity of the 1990’s, which in turn gave way to reinforced family ties in the early 2000’s. A) Gree...

**English **

Hello, I am asking for these to be reviewed. I do not want answers; I just want to know if these answers look good. If you would just tell me which ones are wrong and why? Thank you for any help. Eliminate unnecessary shifts in tense, mood, voice, or person 1Q)The greed of the...

**3rd grade math**

how many packages of ribbon will sarah buy?

**math**

How could you change 7*8 to make a false number sentence?

**MATH HELP!**

solve equation exactly over interval (0, 2ð) sin(x)= 1-2sin^2(x)

**Ochem**

By looking at the chemical structures of acetaminophen, aspirin, caffeine, ibuprofen, and naproxin sodium, how are you able to determine the relative polarity of each? Does it have something to do with the symmetry of the structure? Please help!

**Physics**

A string is tied to a 4.4 kg block and a 120 g hanging bucket. students add 20 g washers one at a time to the bucket. the students are unaware that the coefficient of static friction for the block on the table is 0.42. What is the maximum force of static friction for the block...

**physics**

a dog runs down his driveway with an initial velocity of 4.0 m/s. the dog then accelerates at 2.5 m/s^2 for 5.0 s. what is the final velocity of the dog?

**math**

use the digits 0,2,4,6,8 exactly once to form a 3-digit and 2-digit NEGATIVE intfer that will give you the LEAST possible sum when the two intergers are added together.

**Physics**

If a person runs the 100m dash in 10.0s, calculate that speed in m/s and km/h.

**Adv. Vocab and Essay**

Health,exercise,eating habits,

**write the solution set in set -builder and interval notation...**

-4 (3y + 13) < -16y - 28

**chemestry**

How many molecules of water are present in 3.45 mL of water at 4°C?

**Phisics**

Two identical springs (neglect their masses) are used to “play catch” with a small block of mass 200 g (see the figure). Spring A is attached to the floor and compressed 10.0 cm with the mass on the end of it (loosely). Spring A is released from rest and the mass is ...

**Phisics**

Two identical springs (neglect their masses) are used to “play catch” with a small block of mass 200 g (see the figure). Spring A is attached to the floor and compressed 10.0 cm with the mass on the end of it (loosely). Spring A is released from rest and the mass is ...

**Physics**

A vertical spring with a force constant of 250 N/m is compressed 7.5 cm and a 0.30 kg ball placed on top. The spring is released and the ball flies vertically upward. How high does the ball go? (thanks for helping)