Se um círculo possui o diâmetro igual a 5 cm, considerando = 3,14 qual o valor da área desse círculo?

Germaine walks at the rate of 10 feet every five seconds while nolan walks at the rate of 15 feet every five seconds. if germaine has a head start of 25 feet, how many seconds will they be at the same spot?

20 da is equal to a. 2,000 cm. b. 2 m. c. 20,000 cm. d. 20,000 mm

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?