The height h, in feet, of an object t seconds after it is dropped from a height of s feet can be modeled by the function h(t)=−16t2+s . From a branch of an oak tree 64 feet above the ground, a squirrel dropped an acorn. The acorn fell straight to the ground without hitting any branches on the way down. According to the model, approximately how long did it take the acorn to hit the ground? A: 1 second
B: 2 seconds
C: 4 seconds
D:8 seconds

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 california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.