# Questions Asked onMarch 26, 2015

1. ## PHYSICS

A diver leaves a 3-m board on a trajectory that takes her 2.7m above the board and then into the water 2.9m horizontally from the end of the board.At what speed did she leave the board?At what angle did she leave the board?

2. ## Physics

A diver leaves a 3-m board on a trajectory that takes her 2.8m above the board and then into the water 2.7m horizontally from the end of the board.At what speed and angle did she leave the board?

3. ## Math

An experiment consists of rolling two fair number cubes. What is the probability that the sum of the two numbers will be 4?

4. ## Algebra

If a quadratic equation with real coefficients has a discriminant of 225, the what type of roots does it have?

5. ## Math

A 40-foot by 10-foot rectangular garden is enclosed by a fence. To make the garden larger, while using the same amount of fencing, its shape is changed to a square. How many square feet larger than the old garden is the new garden?

6. ## chemistry

7. Calculate the density of hydrogen sulfide, H2S, at 56 ºC and 967 mmHg. (Express density in g/L)

7. ## Geometry

A rectangular quilt's length is twice the length of a rectangular picture, and the quilt's width is three times the width of the same picture. The area of the picture is 2 square feet. What is the area of the quilt, in square feet?

8. ## math

The function f(x) = cx/2x+3 satisfies f(f(x))=x for all real numbers x\= -3/2. Find c.

9. ## math

There are 20 bikes in spinning class, the bikes are arranged 4 rows, with 5 bikes in each row. They hope to be in the same row, but cannot request specific bike. Determine the probability that all 5 friends will be in same row with Jeff and dariya at

10. ## algebra

if a quadratic equation with real coefficents has a discriminant of 10, then what type of roots does it have? A-2 real, rational roots B-2 real, irrational roots C-1 real, irrational roots D-2 imaginary roots

11. ## Astronomy

Imagine that the asteroid A that has an escape velocity of 50m/s. If asteroid B has twice the mass and twice the radius it would have an escape velocity _______ the escape velocity of asteroid A

12. ## us history

Which of these actions did President Lincoln take at the beginning of the Civil War? He declared martial law throughout the nation. He imprisoned congressional representatives from the South. He issued a declaration of war without the consent of Congress.

13. ## goverment

Do you think that the compromise creating a two-house chamber to balance the needs of smaller and larger states was the best solution? Explain.

14. ## us history

John Brown, supported by abolitionists and Republicans, tried to start a slave revolt. Therefore be it resolved that the defense of slavery is a common cause to all Southern states. At the call of any Southern state, we are authorized to send troops and

15. ## us history

How did the Union benefit from holding Maryland? Maryland had a well-trained militia and officers Maryland had more railroads than any other state at the time The Confederate capital was bordered by Union territory The Union capital was not surrounded by

Elliot put 7 cups of tea into the pitcher shown. How many more cups of tea does he need to fill the pitcher? (1 quart = 4 cups)

17. ## math

The area of a circle is given by the formula A = ðr2, where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100ð square inches, what is the radius of the original circle?

18. ## physics

You're in an airplane that flies horizontally with speed 830km/h (230m/s ) when an engine falls off. Neglecting air resistance, assume it takes 35s for the engine to hit the ground. Find the height of airplane. Find the horizontal distance that the

19. ## math

At a lumber company, shelves are sold in 3 types of wood, 2 different widths and 5 different lengths. How many different types of shelves could be ordered?

20. ## geometry

In quadrilateral QRTS, we have QR = 11, QS = 9, and ST=2. Sides line RQ and line ST are extended past Q and S, respectively, to meet at point P. If PS = 8 and PQ = 5, then what is RT?

21. ## Algebra

Solve the system by substitution. -5x + y = -3 3x - 8y = 24 I'm not sure which equation to choose as I begin to find the y value. Some assistance would be greatly appreciated! Thank you!

178. ## math

For what values of k does the line y= x + k pass through the circle defined by x^2 + y^2 = 25 at: 2 points? 1 point? 0 points? I found the discriminant: 100- 4k^2 but i don't know how to find for each of the points

179. ## Algebra 1

Okay so I have 2 problems that i cannot figure out. I have called several people to help but they cant figure it out. Here are the problems. By using only four 6's make an equation that equals 10. Using only four 7's make an equation that equals 10.

180. ## chemistry

Calculate the pH at the stoichiometric point of a titration of 25.0 mL of 0.120 M benzoic acid with 0.0230 M NaOH

181. ## CHEMISTRY

What weight of O is produced when 3.00 g of KClO3 (s) is decomposed according to the reaction 2KClO3(s) 2KCl(s)+ 3O2(g)? A. 0.392g B. 0.587g C. 0.783g D. 1.17g add a quick explanation, thnx

182. ## Health P.2

People living with HIV can have a longer and healthier life by ________. A. Joining a support group B. Taking their medicines C. Learning as much as possible about HIV and available treatments D. All of the above I'm guessing D?

183. ## PHYSICS HELP

Suppose the aliens watching the show are on the surface of Mars. Mass of Mars: 6.42 x 10^23 kg Radius of Mars: 3.394 x 10^6 m Calculate; A) the weight of a 40.0 kg alien on Mars B) the weight of 40.0kg alien on earh Earth-sun distance:1.50x10^11m Mars-sun

184. ## Math

If a wheel turns 9 revolutions per minute and its circumference is 3.77 what speed must a mouse run to stay on top

185. ## us history

Which set of issues led to the Civil War? Economics, religion, boundaries Politics, education, voting rights Slavery, politics, economics Voting rights, slavery, politics is it c pls help me

186. ## HealthP.2

________ is a medicine used to fight HIV infection. A. Protease Inhibitors B. Fusion Inhibitors C. Reverse Transcriptase Inhibitors D. All of the above I truly don't know this. Please help!!!!!!

187. ## Math question

Of 100 students surveyed, 33 like orange soda, 55 like cola, and 14 like both. How many students do NOT like orange soda? My answer=67. Am I correct?

188. ## Math

Jane will receive 18% less of her regular pay when she retires. Her regular pay is $500 per week. a How much would she receive per week if she retires today? answer: 500/18% = 90 500-90=$410 b. Explain how you can make this same calculation using

189. ## ELA

"I THINK I CORRECT ANSWER IS D " can someone please check ......... Which of the following quotes spoken by Romeo shows the strongest example of how he changes over the course of Romeo and Juliet? A . “Sleep dwell upon thine eyes , peace in thy breast! /

190. ## French help (:

Which is the correct form of the adjective? les grandes arbres < ? les grands arbres les grand arbres Which is the correct form of the adjective? les nouvelles classes les nouvel classes les nouvelle classes < Which shows the correct form of the adjective?

n/4=17/3

192. ## chemistry

If you used different branded of tea beg what is the expected % of coffeine you will isolated. Why?

207. ## Math Venn Diagram

I need help with these questions: A survey of 115 children found that 39 liked The Little Mermaid 43 liked 101 Dalmatians 56 liked Mickey Mouse 7 liked The Little Mermaid and 101 Dalmatians 10 liked The Little Mermaid and Mickey Mouse 16 liked 101

208. ## math

An equilateral triangle and a square both have perimeters of 48 inches. What is the ratio of the length of the side of the triangle to the length of the side of the square? Express your answer as a common fraction.

209. ## Math

a cylinder with base area 24π cm2 and height 16 cm

210. ## algebra

Show how you would solve by Substitution: 2x + y = 0 x – 3y = -7 Show how you would solve by Elimination: 3x + 4y = 1 5x – 3y = 21

211. ## math

The area of a triangle is 600 square feet. Find the altitude, in feet, of the triangle if the length of the corresponding base is 30 feet.

212. ## geo

A square has an area of 25. A rectangle has the same width as the square. The length of the rectangle is double its width. What is the area of the rectangle?