5. Shara's new lawn sprinkler watered a circular area with three times the radius of the old sprinkler. How many times greater was the area watered by the new sprinkler than the area watered by the old sprinkler?

Question

a)3
b)6
c)9
d)36

6.How many x-intercepts does the graph of the equation below have ?

y = 2x^2 - x - 3

a)3
b)2
c)1
d)0

My answers: (please check)

5. A
6. A

Answer 1

5 ok
6 huh? How can a parabola have three roots? Did you try graphing it? Remember the quadratic formula?

recall that an nth degree polynomial has at most n real roots

Answer 2

oops. #5 the area is 3^2 times as big.

Answer 3

5. C
6. B

Answer 4

much better

Answer 5

your screen name reminds me of this one:

aibohphobia: fear of palindromes