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leonid [27]
3 years ago
6

9% is 75% of what number

Mathematics
1 answer:
aniked [119]3 years ago
6 0

Answer:

9 is 75% of 12

Step-by-step explanation:

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adelina 88 [10]
In the given equation above relating the number of races the runner had run and the finishing time,
                                         f = -1.2n + 38.1
It can be deduced that the initial finishing time is approximately 38.1 and that the time is reduced by 1.2 minutes in every race that the runner had run. Therefore, the answer to this item is letter B. 
5 0
4 years ago
One container of Tums® costs 4.00 dollars. Each container has eighty 1.00 g tablets. Assume each Tums® is 40.0 percent CaCO₃ by
Anna007 [38]

Answer:

The total cost is 1.25 dollars.

Step-by-step explanation:      

The reaction between HCl and CaCO₃ is giving by:

2HCl(aq) + CaCO₃(s)   →   CaCl₂(aq) + CO₂(g) + H₂O(l) (1)

0.500L     M: 100.01g/mol        

0.400M

According to equation (1), 2 moles of HCl react with 1 mol of CaCO₃, so to neutralize HCl, we need the next amount of CaCO₃:

m CaCO_{3} = (\frac{1 \cdot mol HCl}{2}) \cdot M_{CaCO_{3}} = (\frac{0.500L \cdot 0.400 \frac {mol}{L}}{2}) \cdot 100.01 \frac{g}{mol} = 10.001 g      

The CaCO₃ mass of each tablet is:

m CaCO_{3} = 1 g_{tablet} \cdot \frac{40g CaCO_{3}}{100g_{tablet}} = 0.4g

Hence, the number of tablets that we need to neutralize the HCl is:

number_{tablets} = ( \frac{1 tablet}{0.4 g CaCO_{3}}) \cdot 10.001g CaCO_{3} = 25  

Finally, if every 80 tablets costs 4.00 dollars, 25 tablets will cost:

cost = (\frac {4 dollars}{80 tablets}) \cdot 25 tablets = 1.25 dollars

<u>So, the total cost to neutralize the HCl is 1.25 dollars.</u>

I hope it helps you!

7 0
3 years ago
How many times can you put 40÷746 in
prisoha [69]
Well 746÷40=18.65 so would that be 18?
7 0
3 years ago
Read 2 more answers
A bowl contains 15 granola bars and 10 fruit bars.
horsena [70]
Granola bars to fruit bars....
15 / 10 reduces to 3/2 in simplest form......so its 3/2, or 3:2, or 3 to 2
5 0
3 years ago
ANSWER ****CORRECTLY**** FOR 20 POINTS + BRAINLIEST!
konstantin123 [22]

Answer:

a. 8.50

Step-by-step explanation:

each pound is 2 kilogram

5 0
3 years ago
Read 2 more answers
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