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kap26 [50]
3 years ago
10

If 18 g of a radioactive substance are present initially and 9 yr later only 9 g remain, how much of the substance will be prese

nt after 12 yr?
After 12 yr there will be g of a radioactive substance.
(Round the final answer to three decimal places as needed. Round all intermediate values to seven decimal places as needed.)
Mathematics
1 answer:
kvasek [131]3 years ago
8 0

Answer:

Him hhhuuu vividly

Step-by-step explanation:

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Roberto decorates rectangular signs. One sign is 2/3 foot long and 1/4 foot wide. Another sign is 1/2 foot long and 1/3 foot wid
nordsb [41]

Answer: It takes Him 1/4 hours to decorate both signs,

Step-by-step explanation:

Hi, since the area of a rectangle is equal to:

Area: length x width

Replacing with the values given;

Sign 1 =A1 = 2/3 x 1/4 =1/6 ft2

Sign 2 =A2= 1/2 x 1/3 = 1/6 ft2

If we sum both areas:

A1 +A2 = 1/6 + 1/6 = 2/6 ft2 = 1/3 ft2 (total area)

Since it takes Roberto 3/4 hour to decorate a 1-square-foot sign:

For 1/3 ft2

3/4 hour x 1/3 ft2 = 1/4 h

ITt takes Him 1/4 hours to decorate both signs,

3 0
3 years ago
help please<br> Answer options:<br><br> A. 18.86<br> B. 120<br> C. 13.37<br> D. 6.43
SVETLANKA909090 [29]
What is the question?
5 0
3 years ago
Plsss help will mark brainliest
DiKsa [7]
C, because 7 divided, or over nine, is 7/9
Hope this helps!
3 0
4 years ago
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Help me on this question it should be easy but I just wanna make sure ;)
FinnZ [79.3K]

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Nate is 10/9/12 years old. How old will he be in 2/1/12 more years
EastWind [94]

The answer is B. 10 9/12 + 2 1/12= 12 10/12. 12÷2=6 10÷2=5 making the answer 12 5/6
5 0
3 years ago
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