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iren [92.7K]
2 years ago
15

How do you write mixed numbers as percents?

Mathematics
1 answer:
Sedbober [7]2 years ago
8 0
Convert the fraction part of the mixed number to a decimal,Divide the numerator by the denominator.

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A doctor prescribes 150 milligrams of a therapeutic drug that decays by about 15% each hour. To the nearest hour, what is the ha
Nikolay [14]

Answer:

4 hours

Step-by-step explanation:

The amount remaining at the end of each hour is 0.85 of the amount at the start of the hour. You want to find the exponent such that ...

... 0.85^x = 0.5 . . . . . x = the number of hours until half is left

... x·log(0.85) = log(0.5) . . . . . take the log to turn it to a linear equation

... x = log(0.5)/log(0.85) ≈ 4.265024

Rounded to the nearest  hour, x = 4.

3 0
2 years ago
15. Work out the<br> area of a<br> rectangle with<br> sides 3.4cm and<br> 4.5cm
pav-90 [236]

Area is length times width so

A = 4.5*3.4 which is 15.3.

The area of the rectangle is 15.3 cm

3 0
2 years ago
Read 2 more answers
A group of students are meeting in the cafeteria. 70 students have already arrived. This is 35% of the group. How many are in th
sesenic [268]
There are 200 students in the group.

To find this, you divide 70 by 0.35 (35%). This will give you 200. To check this, multiply 200 by 0.35 and you will get 70. Thus making 200 the answer.

I hope this helps!
4 0
2 years ago
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Find the least common multiple of 20, 4, and 5
Salsk061 [2.6K]

Answer:

LCM = 20

Step-by-step explanation:

You need to make everything into 20. Luckily, 4X5 is 20 and vise versa.

4 0
3 years ago
Can someone help me???
kompoz [17]
#9 You have to make the fraction a decimal, then multiply 11.8 by 6.5. This is because 11.8 is per hour.

#10 here is a hint, one quarter of an hour is 15 minutes. again change the fraction to a decimal

#11 just multiply the 2 numbers
1.4
×2.9
---------
126
+ 280
------------------
3.06
6 0
3 years ago
Read 2 more answers
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