For economic reasons, reinforced concrete should be designed to be _______.

(06.07 MC)  The number of cavities in school-aged children and size of vocabulary are known to have a strong negative association. Toby concluded that the number of cavities causes a decrease in vocabulary. Is Toby’s conclusion valid? Explain. (4 points)

(04.02 MC)  A coin is weighted so the probability of heads is 0.65. The coin is tossed 15 times, and the number of times heads shows is recorded. This procedure is repeated 100 times with the number of times heads shows noted each time. What kind of distribution is simulated? (4 points)

Find an equation for the nth term of the sequence. -1, -4, -16, -64, … (7 points)  

Based on class discussion what is the best way to test overall flexibility?  

Find the first six terms of the sequence. a1 = -9, an = 4 • an-1 (5 points)

Determine if the graph is symmetric about the x-axis, the y-axis, or the origin. r = 2 cos 5θ (5 points)

Rigid areas of densely packed phospholipids, cholesterol, and protein in the cell membrane are called

Which set of terms best describes a proton?

An auditorium has 15 rows with 10 seats in the first row, 12 in the second row, 14 in the third row, and so forth. How many seats are in the auditorium? (7 points)