The variable the researchers intentionally varied in the experiment is time and the units of the variable is mins.
<h3>What is an independent variable?</h3>
The independent variable is the variable that the researcher varies or changes or manipulates in the course of the experiment. The independent variable usually have a direct effect on the dependent variable.
With the passage of time, the level of concentration increases. This means that time is the independent variable and concentration is the dependent variable.
Please find the required table attached. To learn more about independent variables, please check: brainly.com/question/26287880
692.08 : 21.1
Divide both sides by 21.1
32.8 :1
32.8ft per second
Hope this helps :)
9n = 81 <-- equation
n = 81/9
n = 9 <-- answer to equation
hope this helps and have a great day :)
T⁴ - 5qt² - 24q²
(t² + 3q)(t² - 8q)
t⁴ - 8qt² + 3qt² -24q²
t⁴ - 5qt² - 24q²
The answer is (t² + 3q).
Follow this as an example
An empty swimming pool needs to be filled to the top. The pool is shaped like a cylinder with a diameter of
10 m
and a depth of
1.4 m
. Suppose water is pumped into the pool at a rate of
11 m3
per hour. How many hours will it take to fill the empty pool?
Use the value
3.14
for
π
, and round your answer to the nearest hour. Do not round any intermediate computations.
The formula for the volume of a cylinder is ∏r2h. The problem gives d=10m, so r=5m.
The pool holds (3.14)*52*1.4 m3 = 109.9 m3 of water.
At a rate of 11 m3 per hour:
( 109.9 m3 ) / (11 m3/hr) = 9.990909 hr.
rounding to the nearest hour, this is 10 hours
