shivqw

A. A bookmark has a perimeter of 28 centimeters. Its area is 33 square centimeters. What are the dimensions of the bookmark?

B. Each side of a square classroom is 6 yards long. The school wants to replace the carpet in the classroom with new carpet that costs $50.00 per square yard. How much will the new carpet cost?

C. The sum of two numbers is 68. The difference of the two numbers is 6. What are the two numbers?

a particle moving a long a straight line with acceleration function a(t) = 3t + 8, initial v(0) = -2 & initial position s(0) = 1.

What is the velocity at any time t? and what is the position of the function at any time t?

How many bones are in our body?

1:  206

2:  390

3:  208

I was sure the ghosts were out to get me.

I can always count on her to be there when I need help.

My teachers' lessons are always fun to listen to, informative, and stimulating.

When I'm tired, I can relax with a good book.

It's no wonder that I would always cringe whenever someone mentioned October 31st.

When she talks to anyone, she always has something positive to say.

Because there are so many books to read, I have my choice of hundreds of subjects.

As you can tell, I am extremely lucky to have a best friend like her.

I know ghosts don't exist, so I wasn't really afraid.

Older kids dressed up in costumes and tried to frighten me.

Most of my classes are interesting.

1. Sometimes she gets mad and refuses to speak to me.

I can forget my problems by reading a good book.

I don't like some kinds of books at all.

I was afraid to go outside because I thought I'd be eaten by a giant pumpkin.

I like school so much that you'd think I'd want to go seven days a week!

My idea of heaven is a quiet weekend with a book!

1. I hate to go to school on Monday mornings.

s. It's the only time I get to see some of my friends.
Even if she's angry, she rarely loses her temper.

The points (2,5) and (2,-5) are the endpoints of the diameter of a circle. Find the area of the circle.

Find the area, diameter = 12m.

Find the area, radius = 8cm.

 Simplify: 4x2(x+2)+3x(5x2+2x-6)-5(3x2-4x).

Simplify: 4y(y2-8y+6)-3(2y3-5y2+2)

What are the products of one singular nitration of benzene? 

Assume water is not the base in the final stage of the mechanism.

-----------------------------------------------------------------

Factor: 16w3 – u4w3

Factor: 3x4y3 – 48y3.

What is the radius of a circle that has a circumference of 3.14 meters?

Factor: 5x2 – 15x – 20.

(a) 5(x-4)(x+1),

(b) -2(x-4)(x+5),

(c) -5(x+4)(x-1),

(d) 5(x+4)(x+1).

Solve for x: 2x – y = (3/4)x + 6.

(a) (y + 6)/5,

(b) 4(y + 6)/5,

(c) (y + 6),

(d) 4(y - 6)/5.

Find the value of 3 + 2 • (8 – 3)

(a) 25,

(b) 13,

(c) 17,

(d) 24,

(e) 15.

Rice weighing 33/4 pounds was divided equally and placed in 4 containers. How many ounces of rice were in each?

Factor: 3y(x – 3) -2(x – 3).

(a) (x – 3)(x – 3),

(b) (x – 3)2,

(c) (x – 3)(3y – 2),

(d) 3y(x – 3)

Multiply: (x – 4)(x + 5)

(a) x2 + 5x - 20,

(b) x2 - 4x - 20,

(c) x2 - x - 20,

(d) x2 + x - 20.

What is |-26|?

(a) -26,

(b) 26,

(c) 0,

(d) 1

BIOLOGY QUESTION

Nowadays they look at the chromosomes which allows parents to know if the fetus is healthy or not. Down syndrome is a big example (Trisomy 21). It's information that allows the parents to make an informed decision before birth. Now there's something else that can be done in the first trimester. They take a sample of blood from the mother which will have the child's cells blood.

QUESTION:

How are they able to differentiate the mother's blood from the child's blood?

Please give as detailed of an answer as possible. Thank you.