What is the sum of this series 20en-1 (5-n)-220-110-95110

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions

What number line represents the solution set for the inequality -1/2 greater than or equal to 4

The moats separating people from the animals are 5 m wide for lions and 4 m wide for the elephants. if the lion’s moat is 4 m deep, how deep should the elephants’ moat be?