1. Algebra

A physics student stands at the top of hill that has an elevation of 37 meters. He throws a rock and it goes up into the air and then falls back past him and lands on the ground below. The path of the rock can be modeled by the equation y = –0.02x² +

2. Algebra

A community group is planning the expansion of a square flower garden in a city park. If each side of the original garden is increased by 9 meters, the new total area of the garden will be 169 square meters. Find the length of each side of the original

3. Physics

An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 4.5× 104 kg, and the force causes its speed to change from 7000 to 5000m/s. (a) What is the work done by the

4. Algebra - help

A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = –0.06x² + 9.6x + 5.4 where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters,

5. statistics

Dylan wants to determine a 90 percent confidence interval for the true proportion of high school students in the area who attend their home basketball games. How large of a sample must he have to get a margin of error less than 0.03? [To find n, use the

6. math

The Smiths want to buy a 9 ft. by 12 ft. carpet and center it in a 15 ft. by 20 ft. room. Can a 3 1/2 foot by 12 foot couch be placed against one of the long walls of the room without touching the carpet?

7. Algebra

Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth. x² – 21 = –4x • 7, 3 • –7, 3 • 7, –3 • –7, –3

8. Algebra

DeSean throws a ball up with an initial vertical velocity of 30 feet per second from a platform that is at ground level. How long will the ball be in the air?

9. science

which of the following examples does not demonstrate a change in velocity? an elevator coming to a stop as it reaches the top floor a cruise ship heading west at a constant speed a soccer ball passed across the field a train remains at a constant speed as

10. science

Which of the following examples does not demonstrate a change in velocity? An elevator slows down in order to stop at the top floor ← A cruise ship travels west at a constant speed A soccer ball is passed across the field or ← A train remains at a

11. Calculus Help

When a foreign object lodged in the trachea (windpipe) forces a person to cough, the diaphragm thrusts upward causing an increase in pressure in the lungs. This is accompanied by a contraction of the trachea, making a narrower channel for the expelled air

12. Algebra

Solve the equation using the Zero Product Property. (3x + 1)(x – 5) = 0 • and 5 • and –5 • and 5 • and –5

13. Biographical Essay Evaluation (Writeacher)

Write a 3-paragraph Biographical Essay. Discuss your experiences with summer: the things you enjoyed and the things you missed about school. What I have written: "A strong sense of freedom is one of my favorite things about summer. It rids me of the stress

14. science

Which of the following pairs of objects would have the strongest gravitational pull? two buildings in the same city ← two tall buildings in different cities two stars very far away from each other two stars very close to each other my answer is c

15. Algebra

I can't figure this out.. A physics student stands at the top of hill that has an elevation of 37 meters. He throws a rock and it goes up into the air and then falls back past him and lands on the ground below. The path of the rock can be modeled by the

16. physical science

Which of the following pairs of objects would have the strongest gravitational pull? two buildings in the same city ← two tall buildings in different cities two stars very far away from each other two stars very close to each other my answer is c

17. physics

Two manned satellites approaching one another at a relative speed of 0.500 m/s intend to dock. The first has a mass of 3.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. Assume that the positive direction is directed from the second satellite

18. Science

5.00 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.10 M, where it remained constant. Then, the container volume was doubled and equilibrium

19. physical science

a model train moving at a constant speed around a circular track has a constant velocity?

20. science

When a basketball changes shape as it bounces off the floor is it because of balanced force acting on it?

34. Physics

An infinitely long thin metal strip of width w=12cm carries a current of I=10A that is uniformly distributed across its cross section. What is the magnetic field at point P a distance a=3cm above the center of the strip? I have tried using the integration

35. Statistics

You take a trip by air that involves three independent flights. If there is an 67% chance each specific leg of the trip is on time, what is the probability all three flights arrive on time? (Round your answer to 3 decimal places.) Probability=

36. Decorating today

What tool can you use during the initial interview to gather information from a prospective client

37. chemistry/science

Not sure if i posted this but Need help with my pH calculations? 0.10 mol of solid sodium hydrogen carbonate and 0.20 mol of solid sodium carbonate are dissolved in the same beaker of water, transferred to a volumetric ﬂask and made to 250.0 mL. The Ka

38. MATH

Ella ordered 16 pizzas for a p. After the party,, there were 3 5/8 pizzas left. How much pizza was eaten? solve the problem

39. Physics

a 5 kg crate falls from a height of 2.0 m into an industrial spring scale. When the crate comes to rest the compression of the spring is 24 cm. what is the spring constant?

40. Science/Biology

Please check my answers: 1. Which of the following correctly states the relationship between monkeys and humans? A. Humans and monkeys evolved from apes. B. Humans evolved from monkeys. C. Humans and monkeys evolved from the same ancestor, which is now

41. 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

42. Math

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

You take a trip by air that involves three independent flights. If there is an 67% chance each specific leg of the trip is on time, what is the probability all three flights arrive on time? (Round your answer to 3 decimal places.) Probability=

44. Algebra 2

1.) According to the American College Test (ACT), results from the 2004 ACT testing found that students had a mean reading score of 21.3 and a standard deviation of 6.0. The scores are normally distributed. A student scores a 35. What percent of the data

111. PC

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.

112. Math

The curvature of a circle with radius r is defined as Descartes’ formula gives a relationship between the curvatures of the four circles. What are Descartes’ formula and the curvature of a circle? What does the sign of the curvature of a circle mean?

113. maths

Find the lenght of the arc from t : 2 to t : 6 for x : 5t-3.y : 1 -3t, z : 4t 5.

114. math

Put 0.25 1/3 3/4 & 49% in order from least to greatest