Is the following statement a good definition? why?

a penny is a united states coin worth one cent.

no, it is not. the statement is not reversible.

yes, it is. the statement is precise and reversible.

yes, it is. the statement is precise.

no, it is not. the statement is not precise.

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.

Qrst is a parallelogram. determine the measure of ∠q pls

Which problem would you use the following proportion to solve for? 24/x = 40/100 a. what is 40% of 24? b. what percent is 24 of 40? c. twenty-four is 40% of what number? d. forty percent of 24 is what number?