All real numbers greater than or equal to 67

Three coins are flipped. what is the probability that there will be at least two tails?

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom