Answer:
The answer would be $40.
Step-by-step explanation:
You take the first 25% off and add it to the other 25% off, which would equal 50% off. After that you take 50% off for $80, which would be $40 because half of $80 is $40.
So first you multiply 4.3 by itself which is 18.49 then half of 42 is 21 so you then multiply pi which is 3.14 by 21 multiplied by itself then divide that by your answer and it turns into a percentage
4.3•4.3=18.49
3.14•21^2=1384.74
1384.74/18.49=74.8
So it’s 74.8%
The options are properly listed below:
A. a proven scientific fact
B. an instrument that is used to examine environmental conditions
C. a testable proposition that explains an observed phenomenon or answers a question
D. the design of an experiment that can be used in scientific inquiry
E. a prediction about something that has not yet been observed
ANSWER:
C. a testable proposition that explains an observed phenomenon or answers a question
EXPLANATION:
HYPOTHESIS is a proposed explanation for an observable fact, but that cannot satisfactorily be explained with the available scientific theories. It is based on the information acquired from a primary source or data collected during a scientific activity.
Also, for a hypothesis to be a scientific hypothesis, the scientific method requires that it is testable.
It is also a trial solution to a question.
Hypothesis can be provisionally accepted as a starting point for further research.
15 Because he is half way there so add 5 to walk there then walk back would be 15