Which of the following would be the best method for investigating the correlation between the hibernation habits of bears and th
e temperature for 90 days prior to their hibernation?
A. Survey
B. Observational study
C. Randomized experiment
D. Experimental study
A. Survey
B. Observational study
C. Randomized experiment
D. Experimental study
1 answer:
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Try this option ↓
Step-by-step explanation:
1) according to the condition two angles are equal, then two sides are equal also, it means
2) √x+4=√(5x+4);
3) the 'x' can be calculated if to solve this equation:
;
4) finally, answer: 9.