Students in an ecology class measured the length and surface area of red oak leaves collected on campus. The leaves were chosen based on their position on the tree: sun leaves were located on the outside edge of the tree, and shade leaves were located deep inside the canopy of the tree. A sample of 12 shade leaves had a mean length of 12.6 cm, with a standard deviation of 2.37 cm. Calculate a 95% confidence interval for the population mean for length of leaves in the shade. Which is the correct critical value of t?

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

What are the solution(s) to the quadratic equation x2 – 25 = 0? o x = 5 and x = -5ox=25 and x = -25o x = 125 and x = -125o no real solution

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.