1. math

A school has 63 students studying Physics, Chemistry and Biology. 33 study Physics, 25 Chemistry and 26 Biology. 10 study Physics and Chemistry, 9 study Biology and Chemistry while 8 study both Physics and Biology. Equal numbers study all three subjects as

2. maths

AB=36 cm and M is the mid-point of AB. Semicircles are drawn on AB,AM and Mb as diametrs.A circle with centre C touches all the three circles. Find the area of the shaded region.

3. Science 24

calculate the momentum of a 2000-kg truck travelling 19 m/s.

4. Physics

A 1.0kg mass weighs 9.8 Newton on earth's surface, and the radius of Earth is roughly 6.4 x 10 to the power of 6. The mass of the earth is 6.02 x 10 to the power of 24. Calculate the average density of Earth?

5. Physics-mechanics

Two spheres are placed so that their centers are 2.6m apart. the force bvetween the two spheres is 2.75 x 10 to the power of negative 12 Newton.What is the mass of each sphere if one sphere is twice the mass of the other sphere?

6. pennfoster

Research project. The HIPAA privacy standards that went into effect in April 2003 greatly affact both the privacy rights of patients and the duties of medical personnel

7. in chem

calculate the mass of this sample: 1.05 * 10 to the power of 26 atoms of neon, Ne(g) I know that I have to first divide by the avagadros constant, then once get the moles I need to multiply by the molar mass of neon to get the grams, I did that sevral

8. ctu

Diane works at a public university. She contributes \$625 at the end of each month to her retirement fund. For the past 10 years, this fund has returned 3.84% a year, compounded monthly. a. Assuming the 3.84% rate continues, how much will she have in her

9. maths --plse help me..

In a pentagon ABCDE, angle B = 168, angle C:angleD = 23:25 and AB//ED. Find angle C and angle D.

10. matg

erin is makin fruit punch for her friends to make the drink she mixes 3 quarts of fruit juice with half quart of ginger ale.what is the ratio of fruit to ginger ale in her drink

11. maths

Express sin 2x cos 4x as a sum of trigonometric functions

12. fin/370

The target capital structure for Jowers Manufacturing is 51% common stock, 20% preferred stock, and 29% debt. If the cost of common equity for the firm is 20.8%, the cost of preferred stock is 11.8%, and the before tax cost of debt is 10.8%, what is the

13. maths --plse help me..

ABCD ia a parallelogram whose diagonals intersecting at E. AC is produced to F such that CF=AE. Prove that ar(BDF)=ar(parallelogram ABCD)

14. science- atmospheric layer

why is the mesosphere important to the atmosphere?

15. maths

In a parallelogram ABCD, diagonals AC & BD intersect at O. E, F, G, & H be the midpoints of sides AO, DO, CO & BO. Find the ratio of (EF+GH+HG+EH) TO (AB+BC+CD+AD)

16. maths --.

If sin theeta=3/5 , cos alpha= -12/13 and theeta,alpha both lie in 2nd quadrant,find the value of tan (theeta+alpha).

17. calculus

solve the following inequality. write your solution in interval notation. x^3+9x^2-108 less than or equal to 0 please show all work

18. English I Speech

Can anyone please share their idea of a strong, powerful hook, background information and thesis about fracking? Please this urgent. Be quick like your life depends on it.

19. English I Speech

Can anyone tell me 3 reasons why fracking is either good or bad and 3 supporting details? Please, thank you It's urgent

20. maths

A motor boat goes downstream twice as fast as upstream. Find the power speed of the boat if the water flows at 6km/h.

21. maths

If y=x+tanx then prove that cos^2x(y2)-2y+2x=0 where y2 is the second derivative...plz help me out.

23. Math

Factor this a^2b^2 -ab^3+16b^4

24. calculus

can someone please help me find all the zeros of the following polynomial. write the polynomial in factored form. f(x)=x^3-3x^2+16x-48 can you please show all work

25. science

what is the temperature range of the stratosphere?

26. math

three sevenths divided by six thirteenths = ?

27. science

I would like to know the lists of situations in which DNA fingerprinting is useful

28. physics

when an accident happens in the sea due to collision of ships, there is a huge amount of oil spill in the sea .how does this affect of eco system?what spices of the marine life are affected by it and how?

29. physics

a cricketer throw the ball to have maximum horizontal range of 120m.if he throws the ball vertically with same velocity what is the maximum height it can reach?

suppose that al knows that the probability of an investigation is 0.70 how low must the probability of water's completing its research on time be so that the probability of litres being awarded the contract is at least 0.65?

31. Math!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

The sound intensity of a rainfall is 4.5×10^-9 W/m^2. Find the corresponding sound intensity level.