Answer:
Pure water =74.1 mL
Step-by-step explanation:
You need 420 mL of a 70% alcohol solution.
420 mL of solution and 70% of it should be alcohol.
So,
420 * 70/100 mL
= 420 * 0.7
= 294 mL of alcohol and the rest should be water.
On hand, you have a 85% alcohol mixture.
The alcohol can only come from the 85% mixture. So, how much of 85% alcohol do we need to get 294 mL of alcohol:
Let
y = alcohol solution needed
85% of y = 294
85/100 * y = 294
y = 294 ÷ 85/100
y = 294 × 100/85
y = 29,400/85
y = 345.88235294117
Approximately, 345.9mL
The rest of 420 mL solution has to be pure water
Pure water = 420 mL - 345.9mL
= 74.1 mL
Pure water =74.1 mL
Put the number of Canolis (maybe the bottom) on one side and time (maybe the left) on the other and start the graph at 12 then fast forward 3 hours and 60 and draw a line between 12 and 60 then do 6 hours at 132 and keep the straight line... the function is a table made from the results of this graph
Without calculating, you can immediately see the absolute value sign, which implies that the final result (x) should be positive, not negative.
Answer:
38
Step-by-step explanation:
Since he wants to have equal number of rows and columns..the number of plants must be a root number. 6203 is not a root number. 6241 is the closest root number
(√6241= 79)
So he needs a minimum of 6241 plants in total for it.
6241-6203= 38
Therefore he needs 38 more plants
