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Nimfa-mama [501]
3 years ago
15

a survey found that 30% of teenagers don’t wear a seatbelt. If five teenagers are selected at random, find the probability that

at least three of them don’t wear a seatbelt.
SAT
1 answer:
Virty [35]3 years ago
8 0

Answer:

about 2 of them would not

Explanation:

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Which statement best describes how chemical equations demonstrate conservation of mass?
scoray [572]

Answer:

Explanation:

Let's just get the answer and then show why the others are wrong.

The answer is C.

The number of reactants and Products need not be the same

C3H8 + 5O2 ===> 3CO2 + 4H2O

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The products = 3 + 4 = 7

So A is incorrect.

================

B is saying that

C3H8 + 5O2 ===> C3H8 + 5O2

The answer is obviously not B

======================

C8H18(l) + O2(g) ==> CO2(g) + H2O(g)      unbalanced

Gasoline is a liquid. All the rest are gases. D is wrong.

=================

C is correct

The left side has

3 Cs

8 Hs

and 10 Os

The right side has

3Cs

8Hs

10 Os

3 0
3 years ago
If you subtract 0. 3 from a certain number, add 0. 4 times the original number to the result, and then add another 2. 78, you'll
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