# Lynette

Popular questions and responses by Lynette
1. ## math

An element has a half-life of 30 years. If 1.0 mg of this element decays over a period of 90 years, how many mg of this element would remain? Begin amount is 1.0 elapsed time is 90y half life 30 years n=9/30 n=3 90/2^2 90/8 = 11.25mg thinking it's wrong

2. ## physics

Two point charges are on the y-axis. A 3.0 µC charge is located at y = 1.35 cm, and a -2.04 µC charge is located at y = -1.50 cm. (a) Find the total electric potential at the origin (V) (b) Find the total electric potential at the point having

3. ## Science

An element has a half-life of 30 years. If 1.0 mg of this element decays over a period of 90 years, how many mg of this element would remain? Begin amount is 1.0 elapsed time is 90y half life 30 years n=9/30 n=3 90/2^2 90/8 = 11.25mg thinking it's wrong

4. ## physics

Suppose that you wish to fabricate a uniform wire out of 0.900 g of copper. Assume the wire has a resistance R = 0.500 , and all of the copper is used. (a) What will be the length of the wire? (m) (b) What will be the diameter of the wire? (µm)

5. ## Science

1. A convex mirror with a focal length of -20cm forms an image 15cm behind the surface. If the object height is 1.2cm what is the image height? 2. An object is placed 10cm in front of a mirror and an image is formed that has a magnification of 2. Which of

6. ## Math

Solve the system equations y=4x+8,x^2+7x-20 I'm truly lost

7. ## Precalculus

1.Write the expression as a sum or difference. cos(5x)cos(-4x) 2.Write the expression as a product. cos(4x)-cos(12x)

8. ## Algebra

If you walk 4/5mile and then jog 3/8 mile what is the total distance covered how much farther did you walk than jog

9. ## Physics

A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 28.0 s. (a) How tall is the tower? m (b) If this pendulum is taken to the Moon, where the free-fall

10. ## algebra 1

Find the radius if a circular lid with an area of 12inch ^2. using (y-h^2 (y-k)^2=r2 I'm pretty confused any help would be great.

11. ## physics

A high-voltage transmission line with a resistance of 0.28 /km carries a current of 1030 A. The line is at a potential of 720 kV at the power station and carries the current to a city located 165 km from the station. (a) What is the power loss due to

With respect to the powers of a federal employees union,which statement is True? 1. It can bargain to obtain better pay and benefits for employees. 2. It cannot lobby Congress for personnel policy changes. 3. It can overrule the decisions of the Office of

13. ## chemistry

a piece of iron measures 10.5cm by 5.25cm by 10.2mm and the density of theiron is 7.86g/cm cubed. what is the mass of the iron?

14. ## accounting

Moreno Industries has adopted the following production budget for the first 4 months of 2013. Month Units Month Units January 10,000 March 5,000 February 8,000 April 4,000 Each unit requires 3 pounds of raw materials costing \$2 per pound. On December 31,

15. ## physics

What is the tangential acceleration of a bug on the rim of a 12.0 in. diameter disk if the disk moves from rest to an angular speed of 75 rev/min in 4.0 s?

16. ## Chemistry

Calculate the pH of 1.7M of KCl

17. ## Physics

A spring stretches 4.3 cm when a 13 g object is hung from it. The object is replaced with a block of mass 22 g that oscillates in simple harmonic motion, calculate the period of motion.

18. ## Math

Reduce to lowest terms 4a3c --------- 6a2b

19. ## Math

Find the points on the graph of the following function where the slope of the tangent line is equal to -5/2. f(x) = x+5/x-5 (x, y) = (smaller x-value) (x, y) = (larger x-value)

20. ## Algebra

if \$1500 grew to \$1575 with 4% simple interest how long was the money in the account?

1. ## History

Machine Guns for sure could wipe out a line of men.

posted on April 3, 2017
2. ## algebra 1

I'm confused I turned it in that way and was told that wasn't the correct formula for algebra formula.So is there really a different way to write it?

posted on March 31, 2017
3. ## Ethics in Tech

Ethics in Technology, pp.474 Answer B: Cooperative agreements

posted on March 16, 2016
4. ## intro to computers

That is incorrect...It is not A

posted on March 9, 2015
5. ## soc 120

#1-A,#2-A, #3-A, #4-A, #5-A,#6-A,#7-A,#8-A,#9-A,#10-A, #11-A,#12-A,#13-A,#14-5,#15-A,#16-A,#17-A,#18-A, #19-A,#20-A,#21-A, #22-A,#23-A, #24-A, #25-A.

posted on July 31, 2011
6. ## physics

R=.28*165 (calc this) plug into following equation and that will give you W =I^2*R =1030^2*R b. P(loss)= IV =1030(720000)

posted on September 17, 2010
7. ## Ethics125

i need help

posted on February 14, 2010
8. ## CheckPoint: Comprehensive Grammar CheckPoint

1a,2a,3a,4a,5a,6b,7b,8a,9a,10a,11b,12b,13b,14b,15a,16a,17b,18b,19b,20a,21a,22b,23a,24a,25b,

posted on October 3, 2008