Uma pirâmide tem por base um quadrado de lado 8 cm, a altura é 20 cm. Calcule a área total dessa piramide​

In the diagram of circle o, what is the measure of zabc?

Zack and tia played chess for 50 min they put the chessboard away at 11: 20 when did they start

1. a music store marks up the instruments it sells by 30%. a. if the store bought a guitar for $45, what will be its store price? b. if the price tag on a trumpet says $104, how much did the store pay for it? c. if the store paid $75 for a clarinet and sold it for $100, did the store mark up the price by 30%?