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earnstyle [38]
3 years ago
14

How many protons are in an element with an atomic number of 8 and a mass number of 18?

Mathematics
2 answers:
Orlov [11]3 years ago
8 0
A)8,atomic number also means proton number
aleksandrvk [35]3 years ago
4 0
Since the atomic number is 8 that will be the number of protons given that the element is a neutral element meaning that the number of protons and electrons are the same. Therefore the answer is 8
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The price of the bicycle that Rocco wants to buy is $282. How much will Rocco pay for the bicycle if the state tax rate is 4%?
olasank [31]

Answer:

Rocco payes $292.28

Step-by-step explanation:

Because it is an increase so you put 104% over 100% in fraction form and then  you put 282 at the bottom of another part of a fraction then you do 100 divided by 282 and you get 2.82 so then you take that 2.82 and you multiply it by 104% and you get 292.28 you can use a calculator to check but i know i did it correctly


5 0
3 years ago
Percentage change 42 increased to 145
dedylja [7]
The answer should be 103? because when you add 103 to 42 u should get 103%.
3 0
3 years ago
M N. M<br> (8x+17) <br> (12x-39)
Ulleksa [173]

Answer:

<em>Here </em><em>it </em><em>is </em><em>a </em><em>parallelogram </em><em>so </em><em>opposite </em><em>angles </em><em>of </em><em>parallelogram </em><em>are </em><em>equal</em><em>. </em>

Step-by-step explanation:

<em>so</em>

<em>8x </em><em>+</em><em>1</em><em>7</em><em> </em><em>=</em><em> </em><em>12x </em><em>-</em><em> </em><em>3</em><em>9</em>

<em>1</em><em>7</em><em>+</em><em>3</em><em>9</em><em> </em><em>=</em><em> </em><em>12x </em><em> </em><em>-</em><em> </em><em>8</em><em> </em><em>x</em>

<em>4x </em><em> </em><em>=</em><em> </em><em>5</em><em>6</em>

<em>Therefore </em><em>x </em><em>=</em><em> </em><em>1</em><em>4</em>

3 0
3 years ago
There are 45 exotic fish in a fish tank. 9 of those fish are clown fish. What percent of the fish in the tank are clown fish.
Marrrta [24]
Percentage can be calculated by dividing the value by the total value, and then multiplying the result by 100.

(value/total value)×100%.

So,
9/45=0.2 x 100= 20%

Answer= 20%
6 0
3 years ago
Match the situation to the most appropriate graph #7
tatuchka [14]
Graph K. This is because the cost of a gallon of milk is not increasing constantly, as in a linear rate, but it has only increased a few times in a year. Therefore, graph K shows that a gallon of milk is a steady, unchanged price, then the cost rises and stays the same, then rises again and stays the same. So, it is not a linear graph because the cost of the milk is not going up at a constant rate.
4 0
3 years ago
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