Noah bought a computer cartridge for $28.50. Sales tax on the cartridge was 6.5%. What was the total amount that Noah paid for the
cartridge? ( I need this answer ASAP)

Can someone me and explain..will award brainlest!

Robert is placing sod in two square shaped areas of his backyard. one side of the first area is 7.5 feet. one side of the other area is 5.7 feet. the sod costs y dollars per square foot

Acertain drug is made from only two ingredients: compound a and compound b. there are 3 millimeters of compound a used for every 4 millimeters of compound b. if a chemist wants to make 693 milliliters of the drug, how many milliliters of compound a are needed?