The cost c (in dollars) of renting a paddle board for h hours is given by c=25+7h. After how many hours is the cost $81?

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

Ill mark the brainliest if you me with the these three questions 7,8,9

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