Answer:
The chemist needs to add 400mL of 40% solution.
Step-by-step explanation:
The equation
gives the percent concentration 
of the final mixture, when 
mL of the 40% solution are added.
Now we are asked, how many milliliters of the 40% solution should the chemist add to get final percent concentration 
; this is just a matter of solving the equation
and we solve it the following way:
Thus, the chemist needs 400mL of 40% solution to get 30% concentration of the final mixture.
Answer:
107/10
Step-by-step explanation:
If its set as 10 7/10
10 x 10 = 100 + 7 = 107
107/10
Answer:
24¾
Step-by-step explanation:
8/18=11/x
x=11×18/8
x=198/8
x=24¾
We can rewrite the given time as:
- 7.03x10^15 mins
- 1.17x10^14 hours.
- 4.88x10^12 days.
<h3>
What is 4.22x10^17 seconds in minutes and hours?</h3>
First, remember that:
60s = 1 min
Then to write that amount in minutes, we just need to divide by 60, so we get:
(4.22x10^17)/60 mins= 7.03x10^15 mins
Now, remember that:
1 hour = 3600s
Then to get the time in hours, we need to divide by 3600:
(4.22x10^17)/3600 h = 1.17x10^14 hours.
Similarly, you can change to any time unit that you want, for example:
1 day = 24*3600 s
Then the time in days is:
(4.22x10^17)/(24*3600) days = 4.88x10^12 days.
And so on.
If you want to learn more about changes of units:
brainly.com/question/9032119
#SPJ1
Answer:
Graph is attached :)
Step-by-step explanation:
Hope that helps!
