6. A university wants to promote the graduates of its honors program. At present it is stated that the GPA of the graduates is 3.5 or below. The university wants to prove at a 90% confidence that the mean GPA of these graduates is greater than 3.5. A sample of 25 university honors program students is taken and is found to have a mean GPA equal to 3.6. The sample standard deviation is 0.40. H₂: H₂: _crit = _stat = Decision: tail α = pvalue =

This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part.   A person's lean body weight L is the amount he or she would weigh if all body fat were magically to disappear. One text gives the "equation that practitioners can use most feasibly in the field to predict lean body weight in young adult males." The equation is found below. L = 98.42 + 1.08W − 4.14A Here L is lean body weight in pounds, W is weight in pounds, and A is abdominal circumference in inches. Find the approximate lean body weight of a young adult male who weighs 181 pounds and has an abdominal circumference of 41 inches. What is the weight of his body fat? What is his body fat percent?

I don't understand how to solve this problem, can you help me? the problem is 15 -6x for x=2.5

The homework problem asks for this to be plugged into the graphing calculator to solve for a approximate solutions for the equation, which i don't know how to do.