# Posts by Sami

Total # Posts: 198

**physics**

A pilot of an aeroplane flying at 300km\hr wishes to release a package of mail at the right position so that it hits the spot. What angle (theta) should his line of sight to the target make the instant of release at 150 metre.

**economics**

A firm's total cost is Tc=40+100Q-420Q^2+30Q^3. Find the unit of production at which average variable cost at minimum.

**Math (please check my answer!!)**

Okay, since we already have the side answer 4 should be out right?

**Math (please check my answer!!)**

What other information must be given in order to be able to prove the two triangles congruent by ASA? i.imgsafe(.)org/c64c59dad9.jpg 1. T=S 2. P=S 3. P=R<<< 4. PQ=QR

**English**

Which of the following is not an object of satire in "a contribution to the statistics'? A. The self importance of social studies B. The corruption of the powerful C. Thee pride of mankind D. The delusions of common people << Which of the following sentences ...

**Geometry (Please check my work)**

Oops, I actually meant to put B

**Geometry (Please check my work)**

A segment has endpoints M(6,15) and N(-3,9). The image of the segmen for a dilation with center (0,0), has endpoints M'(2,5)and N (-1,3). What is the scale factor of dilation? A. 2<<<< B. 3 C. 1/2 D. 1/3 I'm not confident with this answer because I still ...

**chemistry**

A 9.35 gram of ring with it's volume of 0.654 cm3 is an alloy of gold and with density of gold and silver respectively 19.3 g/cm3 and 10.5 g/cm3 assume there is no change in volume when pure metals are mixed. The volume of gold is?

**Second opinion**

I just need a second opinion

**Math**

So my teacher marked this 0/6 but only told me to correct 2 things. Can some one check over this? If I'm right I need to email my teacher.. Complete the two column proof. Given: <2 and <5 are supplementary. Prove: L || M Statement 1: <2 and <5 are supplemtary. ...

**History**

Thats the problem I'm having, thats the way the questions are written in the quick check

**History**

Which of the following is important when a primary scheduled as heavily front-loaded as it was in 2008? A. A clear stance on the issues B. The ability to raise money C. A comprehensive general election strategy D. A steady, slow building following with the primary electorate &...

**Geometry (Please check my work)**

Find the image of O (-2,-1) after two reflections, first across the line y=-5, and then across the line x=1. I believe the answer should be (-1,-6) Can someone please confirm?

**Math**

I was wrong :( it was 270, I'll have to look over and find my mistake

**Math**

Another question I'm a bit confused on.. What is the angle of the rotation about C the maps the solid figure to the dashed figured? tinypic(.)com/r/2utnvoo/9 Choices: 90° <<<< my answer 180° 270° 360°

**Math**

Nevermind! I solved I figured out what I was doing wrong

**Math**

Point Y (-1,-3) is rotated 180° about the origin. What are the coordinates of it's image, point Y'. I keep getting (-1,-3) but that's not a choice. I'm not sure what I'm doing wrong, can someone help? These are the choices listed (-3,-1) (-3,1) (1,3) (3...

**History**

Thank you

**History**

What is the main reason some people believe there should not be any limits on presidential terms? A. There should be a monarch instead of a president. B. The people should decide how long a president can serve in a democracy.<<<<< C. Presidents get better with ...

**Algebra 1**

Please help, I would really appreciate it.

**Algebra 1**

Simplify the difference (-7p^4+4p^3+6)-(3p^3-5p+3) I removed the parenthesis and changed the addition and subtraction signs to their opposites on the second set; -7p^4 + 4p^3 + 6 - 3p^3 + 5p - 3. When I combined the like terms, I was able to simplify the polynomial to p^3 + 5p...

**Language Arts**

Which of the following correctly revises the the sentence so that it is entirely in the active voice? A. It has been decided by the school that the regular teacher should not evaluate the class; instead, the assessment should be performed by a visiting scholar. B. The school ...

**Algebra 1**

Wait, I just realized that 15x – 12 + 4x is a polynomial because the x is automatically x^1, so yeah. Also in the link you gave me it says that x - 2 and 3x are both polynomials. Therefore, it technically would be a polynomial.

**Algebra 1**

Okay, so if it was 15x^3 - 12 + 4x^3, then it would be a polynomial?

**Algebra 1**

Is this a polynomial? 15x – 12 + 4x I'm pretty sure it is a polynomial, am I right?

**Science**

What does Asimov predict will happen to earth in billions of years? a. it will be burned up by the sun b. its population will increase*** c. it will shrink slightly in size d. it will change position in the galaxy Am I correct?

**Chemistry**

When an electric current passes through water during the process of electrolysis, two gases are formed. One gas has a boiling point of -183 C and the other has a boiling point of -253 C. Has a physical change or chemical change occurred? Explain. I think it is a chemical ...

**Algebra 1**

Never mind, I'm gonna stick with D.

**Algebra 1**

Wait, is the answer A?

**Algebra 1**

Anyone?

**Algebra 1**

Identify the initial amount a and the growth factor b in the exponential function. f(t)=1.4^t A)a = 1, b = 0.4 B)a = 1.4, b = 0 C)a = 1.4, b = t D)a = 1, b = 1.4*** Is this correct? If I'm wrong can you please explain why, thanks! (=

**Georgia History**

I finished the test before you replied, all of my answers were right, got a 100%...

**Georgia History**

Ms. Sue? Anyone?

**Georgia History**

1. Which of the following describes the Puritans? A) didn't have much success as planters B) made Sunbury into a thriving port*** C) came from the backcountry of Virginia D) came from Pennsylvania by way of North Carolina 2. Georgia’s slave code was modeled after the ...

**Math**

Steve, Thank you. How does it work, then, when you have both squared and cubed such as: 2(4/3(1.5m)^3) + pi(1.5m)^2(3m)

**Math**

I have determine if these are area or volume simply based on looking at them without doing the calculations. Could you please explain how to do that? 1. pi(4 in)^3 is in the numerator 3 is in the denominator 2. 2pi(1.5m)^2 + 2pi(1.5m)(3m) 3. 1/2(10ft)(18ft) + (10ft)^2 Thank you.

**biology**

In a cross between a white-eyed female fruit fly and red-eyed male, what percent of the female offspring will have white eyes? (White eyes are X-linked, recessive)

**biology**

Could a man with type B blood and a woman with type AB blood produce a child with type O blood? Explain

**biology**

Albinism (lack of pigment) is caused by a recessive allele in humans. If normal parents have an albino child, what is the probability that their next child will be normal for pigment?

**math**

You roll a number cube twice. Find the probability of the event in fraction form. -Rolling a 4 then an even number -Rolling a 3 then a 3 -Rolling a number less than 1 and then a number less than 2

**esl**

change the underlined nouns to pronouns. We well give it to our childern.

**physics**

an inclined plane, which slopes at 37degree is used to raise a 10 kg object to a heghit of 4m if the efficency is 80% determine a,the load (t@ke sin 37=0.6,cos 37 =0.8) b,the cofficent of kinetic friction c,the effort force

**Physics**

A 60kg man standing on a stationary 40kg boat throws a 0.2kg ball with a velocity of m/s. Assuming there is no friction between the man and the boat, what is the speed of the boat after the man throws the ball?

**Math**

The espionage is use only an associative property to rewrite the expression: (mq) * n My teacher says the correct answer is m * (qn) but could the answer also be (nm) * q or m * (mq) or q * (mn)?

**Geometry**

I'm a little confused about what a Pythagorean Triple is. As long as your two legs are both whole numbers, isn't every one a triple?

**Math**

Thank you.

**Math**

I just want to make sure I have done this correctly. (10a^3b)(3ab^2c^2) = 30a^4b^3c^2

**REINY -- Math - Could Someone Check My Work?**

Reiny, thanks but the original problem isn't (-6x^6)(6x^6) The original problem is (-6x^6)(-6x^2x^6) So I thought I would have to simplify inside the second parentheses first to make that (-6x^8) by adding the exponents (2 + 6) Then I have (-6x^6)(-6x^8) I then multiply -6...

**Math - Could Someone Check My Work?**

6x^6 ∙ 6x^6 = 36^12 no, keep the base and add the exponents = 6^12 or multiply the bases and keep the same exponent = 36^6 Why would this be? I thought I had to multiply the 6 in each and then add the exponents in each? ((6x^7)/(2x^2 ))^2 = 9x^45??????? NO = (3x^5)^2 = ...

**Math - Could Someone Check My Work?**

Could someone check my work please? Thank you! (14a^2b)(2ab^2c) = 28a^3b^3c (a^25)^7 = a^125 6x^6 ∙ 6x^6 = 36^12 (2x^2)^3 = 8x^6 (-2)0 = 1 30x^20/(6x^9 = 5x^11 4x^5 ∙ 6x^6 = 24x^11 (2x^4)^3 = 8x^12 -4^2 = -16 -(193)^0 = -1 (-193)0 = 1 (-5)2 = 25 ((6x^7)/(2x^2 ))^2...

**math**

What is the difference between B as in the longer base of a trapezoid and b as in base in terms of geometry?

**math**

Is -4 to the zero power still 1 since all numbers to the zero power are 1 or is it negative 1?

**physics**

An electric field of magnitude 3640 N/C is applied along the x axis. Calculate the electric flux through a rectangular plane 0.166 m wide and 0.72 m long if the plane is parallel to the yz plane. Answer in units of N · m2 /C. 435.05 N. m2/C 002 (part 2 of 3) 10.0 points...

**Math**

What I'm asking about is actually about the decrease in the second chart. If I divide top to bottom (80.2/71.4, 71.4/63.5, etc), I get a different result than if I divide bottom to top (71.4/80.2, 63.5/71.4 and then subtract from 1.00). If I do the top to bottom way I get ...

**Math**

I have the following chart that I am supposed to find the percent increase in one step. The directions specifically say not to use a two step method. 10.5 12.5 14.9 17.7 21.1 25.1 So I divide 12.5 by 10.5, 14.9 by 12.5, etc. When I do this (and round) I get about 19% increase ...

**Math**

Does linear growth have to add the exact same amount each period, so a constant amount each time such as 500, 500, 500, etc, or does it just have to be close each period, such as 125, 137, 145, 160, etc?

**Math**

I have the following chart that I am supposed to find the percent increase in one step. The directions specifically say not to use a two step method. 10.5 12.5 14.9 17.7 21.1 25.1 So I divide 12.5 by 10.5, 14.9 by 12.5, etc. When I do this (and round) I get about 19% increase ...

**Math**

Does linear growth have to add the exact same amount, so a constant amount each time such as 500, 500, 500, etc, or does it just have to be close, such as 125, 137, 145, 160, etc?

**math**

Does linear growth have to add the exact same amount, so a constant amount, each time or does it just have to be close?

**Math**

I have the following chart that I am supposed to find the percent increase in one step, not using a two step method. 10.5 12.5 14.9 17.7 21.1 25.1 When I do this (and round) I get about 19% increase for each one. (we are supposed to round. Then I have another chart that we are...

**Math**

I have a triangle with equal sides. Then a s cons triangle is put in the middle so I have four triangles. Triangles are continued to be put instead so I have more and more triangles. As more triangles are added in the same space, the size of them are getting smaller. Could you...

**physics**

A positive charge of 0.0001258 C experiences a force of 0.3 N when located at a certain point. What is the electric field magnitude at that point? Answer in units of N/C.

**physics**

Three point charges, two positive and one negative, each having a magnitude of 30 µC are placed at the vertices of an equilateral triangle (43 cm on a side). What is the magnitude of the electrostatic force on one of the positive charges? The value of the Coulomb ...

**physics**

Find the distance between the two electrons. The value of the Coulomb constant is 8.98755 × 109 N · m2 /C 2 and the acceleration of gravity is 9.81 m/s 2 . 1. 0.507424 m 2. 50.7424 m 3. 5.07424 km 4. 5.07424 m 5. 5.07424 cm can anybody help me please

**Pre-calculus**

Hooke's Law states that the distance a spring will stretch beyond its natural length varies directly with the force applied to the spring. A force of 12 pounds is needed to stretch a certain spring 9 inches beyond its natural length. Find a formula that models the length a...

**physics**

How much positive charge is in 0.8 kg of neon? The atomic weight (20.1797 g) of neon contains Avogadro’s number of atoms, with each atom having 10 protons and 10 electrons. The elemental charge is 1.602 × 10−19 C and Avogadro’s number is 6.023 × ...

**Math**

Hooke's Law states that the distance a spring will stretch beyond its natural length varies directly with the force applied to the spring. A force of 12 pounds is needed to stretch a certain spring 9 inches beyond its natural length. Find a formula that models the length a...

**chemistry**

A gas has a mass compostion of 20.8% nitrogen, 25.8% oxygen, 28.4% carbon dioxide and 25 % hydrogen. Determine its average molecular weight.

**math**

Is the only difference between a ratio and a rate in a ratio the units are the same so they cancel out and in a rate they are different so they don't cancel out and so you have to show them?

**chemistry**

How would your calculated %P2O5 value be affected if you had not used this blank solution

**physics**

Alice has a mass of 70.0 kg and her car has a mass of 1000.0 kg. Alice is sitting in parked car on the side of the road. The magnitude of the normal force exerted by the road on her car is? (use g = 9.81 m/s2)

**ART CHECKING!!! PLEASE CHECK IT!!! :(**

@Mackenzie cancer's answers are correct. Maybe it was for a different assessment bevause I just took it and got a 10/10

**need help with thsi equation**

ZnSO4.xH2O(s) ---> ZnSO4(s)+xH2O(g)

**need to balance equation**

ZnSO4.xH2O(s) ---> ZnSO4(s)+xH2O(g)

**Maths Income Tax**

1) A man with an income of $7500 and allowance of $1800, paid $1824 in tax. What is the rate of taxation? 2) Mr Green earns $95 per week and has allowances of $ 2450. Mrs Patel earns $19400 per annum and has allowances of $3680. They both pay all their tax at basic rate. How ...

**Maths proportions**

1) Nine milk bottles contain 4.5 litres of milk between them.How much do five bottles hold? 2) A shopkeeper can buy 36 toys for $20.52. What will he pay for 120 toys? 3) Three men can build a wall in 10 hours. How many men would be needed to build the wall in 7.5 hours? 4) ...

**Maths-Proportions**

Thnx

**Maths-Proportions**

1) An aircraft flying at 500 km/h completes a journey in 8.4 h. How long would the journey take if it flew at a speed of 420 km/h? 2) Jackie can drive to work in 18 mins if he travels at an average speed of 35 m.p.h. How long will the journey take if she drives at an average ...

**chemistry**

a 2.00g sample of zinc metal is added to a calorimeter containing 150g of nitric acid solution initially at 20.0 degrees celsius . The temperature of the solution increased to 28.0 degrees celsius . Calculate the delta H of the reaction assuming that the specific heat capacity...

**science**

Lele is right👌🏼

**us hist help!!!!**

Raven Firestone is correct

**Math**

Two 6-sided dice are rolled at the same time. How many outcomes correspond to the event that the sum of the numbers is 5?

**Math**

Thank You bobpursley

**Math**

I really need help on this PLEASE a 5 man baseball team how would I find average? Would it be total hits divided by at bats or add up the 5 averages and divide by 5? Thank You - Please help me!

**Math**

For a 5 man baseball team how would I find the average? Would it be total hits divided by total at bats or add up 5 averages and divide by 5?

**math**

samantha has 28 and she gets 28 more how many would she have in all.

**physics**

A car moving with an initial speed v collides with a second stationary car that is 46.0 percent as massive. After the collision the first car moves in the same direction as before with a speed that is 37.7 percent of the original speed. Calculate the final speed of the second...

**physics**

Three identical uniform meter sticks are placed on the floor. The first stick lies along the y axis from y = 0.320 m to y = 1.32 m. The second stick lies along the x axis from x = 0.330 m to x = 1.33 m. The third stick is positioned so that one end is on the x axis at x = 0....

**accounting**

4. Graham maintains that formulation and implementation are phases in the strategic management process. Yolanda maintains that evaluation and estimation are also part of this process. Who is correct? A. Yolanda is correct. B. Both Graham and Yolanda are correct. C. Graham is ...

**medical coding**

A patient is admitted to the hospital for chest pains due to tachycardia. While in the hospital, the patient was also treated for type 1 diabetes. Upon further review, the coder noted that the documentation and ekg didn, t provide further evidence of the type of tachycardia or...

**Science Fossils**

So it would be B

**math**

1.5 mn/m

**physics**

A staging that weighs W staging supports a painter weighing 770 N. The reading on the left scale is 660 N and the reading on the right scale is 410 N. What is the weight of the staging? Answer in units of N

**physics**

An arrow is shot from a bow at 20.0 m/s at an angle of 65 degrees above the horizontal. The arrow leaves the bow at a height of 1.80 m. At what height will it strike a wall that is 10.0 m away? (Remember to connect the two motions of the arrow using time.)

**Math**

right because you would divided 32 and 4 to get 8

**government**

That's really helpful of u.

**science**

656.2

**Math**

Okay so for anyone stuck on this quick check. The actually answers are C B D A C

**Physics**

Calculate the distance (in ) that Larry runs if he maintains an average speed of 8.9 for 1 hour.

**Physics**

Two small pith balls, each of mass m = 16.6 g, are suspended from the ceiling of the physics lab by 1.8 m long fine strings and are not moving. If the angle which each string makes with the vertical is è = 19°, and the charges on the two balls are equal, what is the...