During exercise, the recommended maximum heart rate in beats per minute is modeled by the formula, m = 176 – 0.8a, where m is the maximum heart rate and a is the person’s age. solve the formula for a. at what age would you have a recommended maximum heart rate in beats per minute of 140?

Need on this one asap im almost done with this subject

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a. about 4 b. about 8 c. about 40 d. about 21

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.