ASAP Can somebody plz answer all of them correct except for #1 thanks! (Only if u done this before)
WILL MARK BRAINLIEST

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax

Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?