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Levart [38]
3 years ago
12

PLS HELP!!

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

Answer:

omg i have that exact same promblem i would say its the frist one but im not 100% sure

Step-by-step explanation:

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Nick starts with 20 milligrams of a radioactive substance. The amount of the substance decreases by 14 each week for a number of
zlopas [31]

Answer:

Eric's expression is :

20(\frac{1}{4})^w

and Andrea's is :

(1-0.5)^w

In Eric's expression, 20 represents the initial amount of substance with which he has started the experiment. \thinspace \frac{1}{4}\thinspace is the amount of substance left after each time period (in this case, each week).The variable w in this case represents the number of weeks.

Andrea's expression can be written as :

1\cdot (1-0.5)^w

The one outside of parentheses represents the initial amount of the substance. The one inside of parentheses represents 100% of the original amount of the substance. 0.5 represents the 50% of the substance that is lost each time period. The variable w in this case represents the number of weeks.

8 0
3 years ago
Read 2 more answers
The proportion of the total area under a normal curve between two z-scores corresponds to the ______ of that range of scores.
omeli [17]

Answer:

For any normal distribution, the mean and the median will have the same value. For any normal distribution, the proportion corresponding to scores greater than z = +1.00 is exactly equal to the proportion corresponding to scores less than z = -1.00.

Step-by-step explanation:

5 0
2 years ago
Which is an equivalent form of the equation 2x - y = 12?
aalyn [17]
2x-y=12
-y=12-2x
(-y=12-2x)devide -1
y = -12+2x
y=2x-12
ANSWER = C
7 0
3 years ago
Can someone help me? <br>​
german

Step-by-step explanation:

p1=7

p2=10

p3=13

nxjdkkdkdkd

3 0
3 years ago
Please help . I’ll mark you as brainliest if correct!!!!!!
STatiana [176]

Answer:

3 are mushed

Step-by-step explanation:

You have 12 tomatoes

All but 9 get mushed

Total tomatoes = mushed + non mushed

12 = mushed +9

Subtract 9 from each side

12-9 = mushed+9-9

12-9 = mushed

3 = mushed

7 0
3 years ago
Read 2 more answers
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