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spayn [35]
3 years ago
12

How many neutrons does element X have if its atomic number is 25 and its mass number is 85?

Mathematics
2 answers:
Lynna [10]3 years ago
5 0

Neutrons= Atomic Mass Number- Atomic Mass Number

So 85-25= 60

Natalija [7]3 years ago
3 0

<u>Answer:</u>

60 neutrons

<u>Step-by-step explanation:</u>

We are given that the atomic number of an element X is 25 and its mass number is 85 and we are find the number of neutrons this element has.

We will use the following formula to find the number of neutrons:

<em>Neutrons = Atomic mass number - Atomic number</em>

So substituting the given values in the above formula to get:

Number of neutron = 85 - 25 = 60

Therefore, element X has 60 neutrons.

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The average American spent $8,508 on health care in 2011. The cost of health care is projected to rise about 5.8% per year for t
klio [65]
<h3>The projected amount the average American spent on health care in 2014  is $ 10075.91</h3>

<em><u>Solution:</u></em>

Given that,

The average American spent $8,508 on health care in 2011

The cost of health care is projected to rise about 5.8% per year for the years 2012-2022

<em><u>The increasing function is given as:</u></em>

y = a(1+r)^t

Where,

y is future value

a is initial value

r is growth rate in decimal

t is number of years

From given,

a = 8508

r = 5.8 \% = \frac{5.8}{100} = 0.058

t = 2011 to 2014 = 3 years

<em><u>Substituting the values, we get,</u></em>

y = 8508(1 + 0.058)^3\\\\y = 8508(1.058)^3\\\\y = 8508 \times 1.1842\\\\y = 10075.914 \approx 10075.91

Thus the projected amount the average American spent on health care in 2014  is $ 10075.91

4 0
3 years ago
Which will have a higher effective interest rate a payday loan for $2300 do in 15 days of the fee of $120 or a payday or loan fo
Elan Coil [88]

Answer:

A payday loan for $2300 due in 13 days with a fee of $120, because it has a shorter period

Step-by-step explanation:

8 0
3 years ago
6.6÷2.2+(3.2+4)=<br> Use pemdas
maxonik [38]
3.2+4=7.2
6.6/2.2=3
3+7.2=10.2
10.2
8 0
3 years ago
A triangle has two sides that measure 4.56 cm and 8.65 cm. Which could be the measure of the third side?
sertanlavr [38]
To test for a triangle, the two smallest sides added together have to be greater than the third side.

3.95 + 4.56 > 8.65
8.51 > 8.65 
this is false

4.56 + 8.65 > 10.31
13.21 > 10.31
could be it

4.56 + 8.65 > 13.21
13.21 > 13.21
no, this would mean they're equal

4.56 + 8.65 > 20.25
13.21 > 20.25
this is also false

<span>B. 10.31 cm
</span>
6 0
3 years ago
Roy is purchasing dried apricots and cherries to use in his homemade trail mix, which requires at least 230 grams of fruit in to
gulaghasi [49]

Answer:

Step-by-step explanation:

If apricots is x, and each apricot weighs 5 grams, then the expression for that is 5x; if each cherry, y, weighs 2 grams, then the expression for that is 2y. If the mix Roy wants to make needs AT LEAST 230 grams of fruit, then

5x + 2y ≥ 230 where the inequality sign "greater than or equal to" satisfies the expression "at least".

4 0
3 years ago
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