Carlo bought four cars each car cost $3 he also bought a truck for$5 carlo paid with a twenty dollar bill. how much change did carlo get back?

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.