Seths reads 15% of the book in 30 minutes. How much more time will he need to finish reading the book?

Nine more than four times a number is the same as one less than twice the number. find the number?

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.

Choose the more precise measurement. 26.4 cm or 8.39 cm