Wk 4 Quiz

Question :
Solve the problem.

A coin is tossed upward from a balcony 242 ft high with an initial velocity of 16 ft/sec. During what interval of time will the coin be at a height of at least 50 ft? (h = -16t2 + vot + ho.)

Student Answer:

0 ≤ t ≤ 1

4 ≤ t ≤ 8

0 ≤ t ≤ 4

3 ≤ t ≤ 4

Points Received:
0 of 4 Comments:

Question 2.
Question :
Solve the problem.

Two cars start from the same point and travel in the same direction. If one car is traveling 57 miles per hour and the other car is traveling at 49 miles per hour, how far apart will they be after 4.9 hours?

Student Answer:

39.2 mi

240.1 mi

279.3 mi

519.4 mi

Points Received:
0 of 4 Comments:

Question 5.
Question :
The graph of a function is given. Decide whether it is even, odd, or neither.

Student Answer:

even

odd

neither

Points Received:
0 of 4 Comments:

Question 7.
Question :
Solve the inequality. Express your answer using interval notation.

0 < (6x - 16)-1 <

Student Answer:

(3, ∞)

(- ∞, 3]

(- ∞, 3)

[3, ∞)

Points Received:
0 of 4 Comments:

Question 8.
Question :
Determine, without graphing, whether the given quadratic function has a maximum value or a minimum value and then find that value.

f(x) = 3x2 + 3x

Student Answer:

minimum; -

maximum; -

maximum; -

minimum; -

Points Received:
0 of 4 Comments:

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