1. science

2Zn+O2=2ZnO. What type of chemical reaction is it

2. English

Speech about mythical character/legendary hero nd rreasons why i fear or admire him or her

3. probability

David has two boxes containing shapes. In box A there are 4 stars and 2 hearts. In box B there are 2 stars and 1 heart. David takes, at random, a shape from box A and puts it into box B.He then takes a shape from box B.

4. Biology

Characteristics that biologists use to classify organisms are a. convergent evolution, cladogram, reproductive isolation. b. reproductive isolation, evolutionary history, shared derived characteristics. c. binomial nomenclature, shared derived

5. PHYSICS

A boy tosses a coin upward with a velocity of 20m/s What will be the maximum height? Time of flight? Velocity as it returns to the hand? Velocity as it hits the ground?

6. math

a sprinter runs 100 meters in 11.5 seconds.What is the runners average running rate in meters per second?Round to the nearest tenth.

7. Physics

Help with this please. No idea. Except for a 22.00 min. rest stop, Emily drives with a constant velocity of 89.5 km/hr north. How long does the trip take if Emily's average velocity is 77.8 km/hr north?

8. Maths age problems

Tom is 6 years older than James. In 5 years time their combined ages willbe36.how old are they now?

9. Math

Rachel and Rena are sharing a bag of jellybeans. Rachel ate 1/5 of the jellybeans. Rena ate 1/6 of the jellybeans left. Rachel then ate 2/5 of the remaining beans. Rena then ate 2/3 of the ones left. Rachel then ate half which left them two yellow

10. Precalculus 11

(6a^2-15a)/(6a-15a^2) (3a(2a-5))/(3a(2-5a)) Multiply top & bottom by -1 -(5-2a)/(5a-2) is that correct? I have an answer here that's -(2a-5)/(5a-2) but I don't understand how to get there... Thanks :)

11. science

a stone is thrown vertically upward,went up 98m and came down.How long was it in air?

12. Phase Transformation

Which of the following phase diagram shows liquid immiscibility ? Eutectic Peritectic Monotectic Eutectoid None of these

13. Precalculus 11

When subtracting 1 rational expression from another, when I'm multiplying the top & bottom of the first term by the denominator in the second term is that number automatically negative because the whole term is being subtracted? ex: (8a-3b)/7a - (2a+5b)/4b

14. Precalculus 11

If when simplifying 2 rational expressions you got: (-2(x-3))/2-x would you multiply the top & bottom by -1? Thanks!! :)♡

15. ALGEBRA

A rectangular room is 1.2 times as long as it is wide, and its perimeter is 25 meters. Find the dimension of the room rounded to the nearest tenth. The length is: The Width is:

16. science

Why is filter paper a poor material on which to powder a solid before introducing it into a melting tube?

17. Math

Is the square of a rational number always greater than the number ?

18. Math

I think of a number, subtract 23 and then divide by 8. The answer is 6. What was my starting number?

19. Focus on the Caregiver

Which one of the following recording methods would you most likely use to keep track of times and details about the daily routine? A. Daily log B. Running record C. Anecdotal record D. Individual journal my answer is a.

20. math

It takes Natasha 20 min to drive to work in the morning. She drives home using the same route, but it takes 11 min longer, and she averages 6 mi/h less than in the morning. How far does Natasha drive to work?

21. Phase Transformation

Change in Gibbs free energy is _____ related to interfacial energy and _____ related to radius of precipitate. directly, inversely inversely, directly directly, directly inversely, inversely

22. Phase Transformation

Concentration vs Distance plots resemble _____________ . Lognormal distribution Binomial distribution Lorentzian distribution Gaussian distribution

23. Help scott biostats

The value of mammography as a screening test for breast cancer has been controversial, particularly among young women. A study was recently performed looking at the rate of false positives for repeated screening mammograms among approximately 10,000 women

The weight of an object on the moon varies directly as the weight of the object on Earth.A 90-pound object on Earth weights 15 pounds on the moon.if an object weights 156 pounds on Earth, how much does it weights on the moon? A.23 pounds B.26 pounds C.28

asked by I dont get this :/

-2hxh/-4h²

26. Math

Jack sold a black jacket for \$150 and took 25% profit. At the same time Jack sold a red jacket for \$150 and took a 25% lost. A. He lost \$20 B. He lost \$25 C. He lost \$30 D. He gained \$20 E. He gained \$30

27. Math

Remainder theorem - 4x×x×x_12×x×x+11×x_5