Answer:
10 kg
Step-by-step explanation:
In 3% concentration of 20 kg of seawater, there will be kg of salt.
So, if it is a 2% solution of seawater,
Then 2 kg salt will be there in 100 kg solution.
So, 0.6 kg salt will be there in kg of solution.
So, to make a solution from 3% to 2% we have to add (30 - 20) = 10 kg of water with a 20 kg solution. (Answer)
Answer:
48
Step-by-step explanation:
There are various multiples of 6 that are greater than 40, but less than 90. Including 42, 48, 54, 60, 66, 72, 78, and 84. :)
I just got 5 free points.
Answer:
5.6% to nearest tenth.
Step-by-step explanation:
Amount after 17 years
= 23300 = 9000(1 + r/365)^(17*365) where r = interest rate as a fraction.
(1 + r/365)^(17*365) = 23300/9000 = 2.588889
Taking logs of both sides:
17*365 log (1 + r/365) = log 2.588889
log(1 + r/365) = log 2.588889 / (365*17)
log(1 + r/365) = 0.0000665775
Removing the logs (by taking each side to the base 10) :
1 + r/365 = 1.000153312
r/365 = 0.000153312
r = 0.05596
As a percent this is 5.596%
<span>1. </span><span>The name of period that has 486
in the given number which is 751 486 is
hundreds.
period is considered to a group of places of the digits, like the given number
486 is the group of hundred because the highest number it contains is 400.
=> 400 + 80 + 6
=> 4 hundreds + 8 tens + 6 ones
=> 486
while 751 is the period of hundred thousands.
=> 700 000 + 50 000 + 1 000
=> 751 000
</span>