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Helga [31]
2 years ago
15

Enter <,>,= to make the problem true -19 5/6 _ -20 1/6

Mathematics
1 answer:
NemiM [27]2 years ago
8 0

Answer:

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..................................................................

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The half-life of a radioactive kind of
Savatey [412]

Answer:

Every 30 years you'll have half left

After 30 years = 900 grams

after 60 years 450 grams

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
a certain test is worth 135 points. how many points (rounded to the nearest point) are needed to obtain a score of 85%?
yanalaym [24]

To obtain a score of 85% on a test worth 135 points, one needs to get 115 points. By using proportions, we get the required value.

<h3>How to write proportions?</h3>

A proportion is defined as an equality between two ratios.

Consider two ratios a:b and c:d. Then, the proportion we can write,

a: b = c : d

Then, the simplification we have for this proportion is

a/b = c/d or ad = bc

<h3>Calculation:</h3>

It is given that, a certain test is worth 135 points.

One to get 85% on this test, he/she needs to get X number of points.

So, we can write the proportions as

X : 135 = 85 : 100

⇒ X/135 = 85/100

⇒ X = 85/100 × 135

∴ X = 114.75 ≅ 115 points

Learn more about proportions at the following link:

brainly.com/question/140018

#SPJ4

7 0
1 year ago
Which phrase describes the algebraic expression r/9
raketka [301]
Well if its fora circle it would be  r ( radios, Half of the Diameter) divided by 9
8 0
3 years ago
PLEASE HELP CHOOSING BRAINLIEST
Rufina [12.5K]

Answer:

Hi friend here is your answer: C

Step-by-step explanation:

There friend hope it helps friend

Pls brainliest friend!!!!

8 0
2 years ago
A certain virus is dying off at a rate of 18% per hour. Initially there were
djyliett [7]

Answer:

3 strain would still alive after 48 hours

Step-by-step explanation:

Initial population of virus = 40000 grams

A certain virus is dying off at a rate of 18% per hour.

We are supposed to find  how much of the  strain would still be alive after 48 hours

Formula : N(t)=N_0(1-r)^t

N_0=Initial population

N(t)= Population after t hours

r = rate of decrease = 18% = 0.18

t = time = 48 hours

So,the  strain would still be alive after 48 hours=40000(1-0.18)^{48}=2.91 \sim 3

Hence 3 strain would still alive after 48 hours

3 0
3 years ago
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