Answer:
50% of the solution
Step-by-step explanation:
25% of 100 ml = 25
added to 70 % of (100 - x) = 70 - 0.7x
we need to add 25 + 70-0.7x to get = 100 ml 60% i.e 60
now,
solve for x
0.7x =25+70-60
0.7x =35
x = 35/0.7
x= 50 % of the solution she needs to drain
Answer:
90
Step-by-step explanation:
first you do 11 + 11 =22
23+45=68
now im postitive you add 68 and 22 and get you final answer which is ...
90
In this question they've given us the formula and they just want us to plug in the numbers and get the value.
P is the original value, P=$600
r is the depreciation rate, r=10%=0.1
t is the time in years, t=2
Answer: $486
Answer:
Read answer below :)
Step-by-step explanation:
So you know that it takes 90 seconds for 10 gallons, right? So you know it's 9 seconds per gallon, removing the 0's (which is the easiest way to simplify).
then you take 8 divided by 60 to find out how long it takes for one gallon.
My math shows this:
A = 9 seconds per 1 gallon
B = 7.5 seconds per 1 gallon
60 seconds for 8 gallons, 30 seconds for 4 gallons, 15 seconds for 2 gallons, 7.5 seconds for 1 gallon. (Notice how I divided by two each time until it was simplified)