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romanna [79]
3 years ago
6

PLEASE HELP! I'LL GIVE BRAINLIEST!!!!!!!

Mathematics
1 answer:
daser333 [38]3 years ago
7 0

Answer:

1.6x10^-18 gram

Step-by-step explanation:

(5.3 x 10⁻²³ gram/molecule) x (20,000 molecule)

= (5.3 x 10⁻²³ x 2 x 10⁴) gram

= (10.6 x 10⁻²³⁺⁴) gram

= (1.06 x 10⁻²³⁺⁵) gram

= 1.06 x 10⁻¹⁸ gram

We need to find the mass of 20,000 molecules of oxygen. It can be calculated using unitary method. Here, we can multiply 20,000 molecules  by the mass of one oxygen molecule.

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The dance committee has a budget of $125 to decorate the gym for the spring dance. They have already spent $65. Some members wan
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Answer:60 balloons

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6 0
3 years ago
Read 2 more answers
which transformation causes the described change in the graph of the function y = cos x? the transformation results in a horizon
luda_lava [24]
The transformations that can occur to the graph of the function y = cos x that will exhibit changes would be changes to the angle, or changes to the coefficient. The transformations can be viewed as follows:

y = cos x transforms to y = cos (kx)

k > 1 ; a horizontal shrink occurs
0 < k < 1 ; a horizontal stretch occurs

y = cos x transforms to y = A cos x

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5 0
3 years ago
After sales tax, an $81 cell phone costs $84.24. What is the sales tax percentage?​
Igoryamba

Answer:

4% sales tax

Step-by-step explanation:

Take the original costs and subtract it from the price after sales tax.

$84.24-$81= $3.24

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this gives you .04, now either multiply by 100 or move the decimal two places to the right to convert the decimal to a percentage.

4 0
2 years ago
I) Consider the following figure,<br><br> ​<br><br> ​<br><br> ​
qwelly [4]

Step-by-step explanation:

If PQRS is a quadrilateral inscribed in a circle, then the opposite angles of the quadrilateral are <u>supplementary</u><u>.</u>

y + 68° = 180° { being opposite angles of cyclic quadrilateral }

y = 180° - 68°

y = 112°

x + 82° = 180° { being opposite angles of cyclic quadrilateral }

x = 180° - 82°

x = 98°

Hope it will help :)❤

4 0
2 years ago
2) In a class of 31 students, some study Physics and some study Chemistry. If 22
Annette [7]
I believe the answer is C
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3 years ago
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