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Cerrena [4.2K]
4 years ago
13

Isotope X has a half-life of 8.00 minutes. How much of a 75.0 g sample will remain

Mathematics
1 answer:
Oksana_A [137]4 years ago
6 0

After 8.00 min, 75.0/2 = 37.5 g of the sample remains.

After another 8.00 min (total 16.0 min), 37.5/2 = 18.75 g remains. (Equivalently, 75.0/2^2 g)

After another 8.00 min (total 24.0 min), 18.75/2 = 9.375 g remains. (Or 75.0/2^3 g)

Finally, after another 8.00 min (total 32.0 min), 9.375/2 = 4.6875 g remains (or 75.0/2^4 g), approximately 4.69 g.

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Cement costs vary from approximately $50 to $75 per ton or 2.5 to 3.75 cents per pound.

Step-by-step explanation:

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A portion is represented by
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8 0
3 years ago
1. Jenny has a brand new home, and would like to be very adventurous in her decorating. She would like to put a series of murals
VashaNatasha [74]

Rectangular implies the area to be length times height  

let height=x  

let width=2 more than the height or Length=2+x  

Area=F(x)=(2+x)(x)=2x+x^2  

f(x)=x^2+2x  

****************To Answer your Additional question  

You see the standard price is $100 for any mural, And also charges $40 per square foot.  

So to show you the approach, Lets say that a mural of 1 square feet needs to be painted, then the charge will be $100 plus the $40 for every square feet, then it will be 100+40(1 square feet)=$140.  

The problem asks for the charge of mural whose area is x, so lets do the same thing.  

$100+40(x square feet)=100+40x and that is the function that gives the price of mural with an area of x.

so, g(x)=100+40x

7 0
3 years ago
Please help I’ll mark as brainliest
Vikki [24]

Answer:

B

Step-by-step explanation:

Angle ABD is congruent to angle CBD--->Definition of perpendicular lines

Segment DB is congruent to Segment Db--->Reflextive property of congruence

Angle ADB is congruent to angle CDB--->angle bisector theorem

2 angles and 1 side is congruent, therefore <em><u>the triangles are congruent by the ASA Congruence Theorem</u></em>

3 0
3 years ago
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