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Goshia [24]
3 years ago
6

How much of a radioactive kind of iodine will be left after 42 hours if the half-life is 21 hours

Mathematics
1 answer:
SOVA2 [1]3 years ago
6 0

Answer:

30 grams

Step-by-step explanation:

If the half life is 21 hours, that means after 21 hours, the initial amount will decrease to half.

So, since we started with 120 grams, it will be at 60 grams after 21 hours.

After another 21 hours have passed (after a total of 42 hours), the amount of 60 grams will split in half again to 30 grams.

So, after 42 hours, there will be 30 grams left of the radioactive iodine

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Find the midpoint of PQ with endpoints P(0, 2) and Q(6, -2). Then write an equation of the line that passes through the midpoint
Fed [463]

Answer:

(3,0)

Step-by-step explanation:

7 0
3 years ago
A Company received an invoice for $1618 dated May 11, terms 2/15 EOM.
Alona [7]

Answer:

26th of May is the last date of the discount period.

15th of June is the last date of credit period

$1600

Step-by-step explanation:

The first question say :

What is the last date of the discount period and last date of credit period?

Initially, EOM is an acronym  meaning End of Month

Now. 2/15 indicates 2%  discount of the amount to be paid must be included in the payment within 15 days after the end of the month in which invoice is issued.

  • The last date of the discount period

In order for the company to be eligible for the discount, the company  must be willing to pay the invoice within the stipulated time -frame of 15 days from the date the invoice is being issued. So from 11th of May , 15 days after will be May 26th . Thus 26th of May is the last date of the discount period.

  • The  last date of credit period

The last date of the credit period will be 15 days  after the end of the Month. The present month is May, so 15 days after the month of May falls at June 15. Thus, 15th of June is the last date of credit period

The second part of the question says:

• If invoice is paid on June 12, how much would the company pay? (Round your answers to the nearest hundredth)

Here , there are two things applied;

  1. The date of the discount period has been passed away (i.e May 26th) but the invoice is being paid on June 12
  2. The payment is done before the last date of credit period.

Thus, the company needs to pay the full amount of $1618 since the date of discount period has passed away.

Now to the nearest hundredth , we have = $1600

5 0
3 years ago
Tara spend of an hour decorating 9 sugar cookies. How long did it take her to decorate 1 sugar cookie?
belka [17]

Answer:

6.6

Step-by-step explanation:

1 hour equals 60 minutes. 60 minutes decided by 9 cookies is 6.6 minutes per cookie

6 0
3 years ago
Read 2 more answers
Help me please!!!!!!
Llana [10]

Answer:

1. Equatoin = y = 2/9x + 1   Slope = 2/9   Y- interpects= 1

 2.Equatoin =  y= 7/5x - 7  Slope = 7/5   Y- interpects= 7

Step-by-step explanation:

6 0
3 years ago
Please help me answer this !
andriy [413]

Answer: 15 x (1/3)


Step-by-step explanation: 15 divided by 3 is 15 right. When you multiple 15 and 1/3 it is like taking one third out of 15. One third out of 15 is 5. Hope this helped! :P


3 0
4 years ago
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