Mrs. Bell graded 6 students' tests in 0.5 hours. At this rate, how long will it take for her to grade 30 students' papers? State your answer in hours and minutes

Draw the line of reflection that reflects △abc onto triangle δ a'b'c'

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Is the square root of 4 plus the square root of 16 rational?