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KengaRu [80]
3 years ago
13

2 MIDDLE SCHOOL QUESTIONS

Mathematics
2 answers:
Furkat [3]3 years ago
7 0
They should both be answer c
vredina [299]3 years ago
3 0

Answer:

The answer to number 1 is c the answer to number 2 is c

Step-by-step explanation:

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A sample of bacteria is decaying according to a half-life model. If the sample begins with 800 bacteria, and after 13 minutes th
nikklg [1K]

Answer:

56.42 minutes

Step-by-step explanation:

The initial sample= y0 = 800

After 13 minutes , amount = 320

Y= y0e-kt

320 = 800e-k(13)

320/800 = e-k13

0.4 = e-k13

In0.4 = -k13

-0.91629= -k13

0.07048= k

Y = 800e-0.07048t

Minutes when the bacterial present will be 15

15 = 800e-0.07048t

15/800= e-0.07048t

0.01875 = e-0.07048t

In 0.01875 = -0.07048t

-3.97656 = -0.07048t

-3.97656/-0.07048= t

56.42 = t

56.42 minutes

3 0
3 years ago
Julio spends about 1/2 hour reading every night he owns 8 science fiction books 12 mystery books and 7 history he wants to add e
Basile [38]
8+7+12=27
40-27=13
So he needs 13 more books
8 0
3 years ago
Read 2 more answers
How do I andser this. I’m stuck
Mars2501 [29]
A= 3:5
b= 12:20
c= yes because 3” 3+2=5 n in the beginning of the problem it said end of season
8 0
3 years ago
Make q the subject of the formula 2(5q^2+1)=c
Ira Lisetskai [31]
Cndnsnakandbdbbbxs snd
7 0
3 years ago
suppose you have a bag that hold 27 pieces of candy: 1 cream soda, 14 apple, and 12 root beer. you reach into the bag to pull ou
Alex787 [66]
I order to solve this you have to find out how how much root beer there is to the total amount of candy. 12/27. Then you find out what the percentage of root beer there is by dividing 12 by 27. It’ll give you a decimal point. Percentage has a maximum of 100%. And you’ll find out what percent based on this decimal. Factor it out of 1. The percentage you get is .44. By factoring out of 1 you can find out that the percentage is 44%. So the probability of finding a root beer out of all the candy is roughly 44%
7 0
3 years ago
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