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Ede4ka [16]
3 years ago
10

Can anyone just tell me how to do this please

Mathematics
1 answer:
Brums [2.3K]3 years ago
8 0
Ik how you  feel not sure how to do it either stilll a beginer on here myself 

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how much of a radioactive kind of bismuth will be left after 40 min if the half life is 20 min and you start with 960 grams?
Darya [45]
If the half life is 20 minutes, then in 40 minutes there is 2 half lives. At the end of Each half life, you will have 1/2 of the sample remaining. So...

After 20 min you have

960/2 = 480

After 40 minutes you will have

480/2 = 240 grams
8 0
4 years ago
What is the sum of the arithmetic series of odd numbers below 1+3+5+...+27
AnnZ [28]

Answer:

196

Step-by-step explanation:

1+2+3+4+......+25+26+27 = (1+27) + (3+25) + (5+23)+(7+21) + (9+19) + (11+17) + (13+15)

= 28 x 7 = 196

It's like area of trapezoid of bases: 1, 27 and height of 14

6 0
3 years ago
It takes Amir 30 minutes to walk to work. If he drives, it takes him 1/3 of that time. What is the latest time that Amir can lea
UkoKoshka [18]
8:50 am

1/3 of 30 = 10 min (so it takes 10 min for him to drive to work)

9:00-10min = 8:50
5 0
3 years ago
Latonya bought flowers for her mother. She spent $45. Each tulip was $1 and each rose was $2. She bought 3 more tulips than rose
allsm [11]
Lets start from scratch.
45 is the number of money she spent that means that right side of = sign is 45
let m represents number of roses.
we can write:

t*$1+ m*$2 = $45

Since she bought 3 more tulips than roses that means that m = t - 3

when we express m we get:

t + 2*(t-3) = 45

the answer is B.
5 0
3 years ago
The function shown is reflected across the y-axis to create a new function. Which is true about the domain and range of each fun
Shkiper50 [21]

Answer: D

Step-by-step explanation:

3 0
3 years ago
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