Use a proportion to solve the problem.A math teacher claims that the students' test scores are directly proportional to the amount of time spent studying. Amy studies 18 hours for a test and gets a score of 70. At this rate, how many hours would she have to study to get a score of 84?
A. 32 hr
B. 15 hr
C. 22.68 hr
D. 21.6 hr
Answer: D
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Solve the problem.A rocket lifts off the surface of Earth with a constant acceleration of 30 m/sec2. How fast will the rocket be going 2.5 minutes later?
A. 4500 m/sec B. -4500 m/sec C. 2250 m/sec D. 3375 m/sec
Solve the problem.An internet user is participating simultaneously in one-on-one chat sessions with 5 other people. Draw a graph with vertices representing users and edges representing chat sessions. How many chat sessions are occurring?
What will be an ideal response?
Solve the problem. Be sure to make a diagram of the situation with all the given information labeled. ? A 72.9-foot rope from the top of a circus tent pole is anchored to the ground 43.4 feet from the bottom of the pole. What angle does the rope make with the pole? (Assume the pole is perpendicular to the ground.) Apply the rules regarding the use of significant digits when determining your answer. Round to one decimal place. ? __________ยบ
Fill in the blank(s) with the appropriate word(s).
Find the indicated probability.Assume that two marbles are drawn without replacement from a box with 1 blue, 3 white, 2 green, and 2 red marbles. Find the probability that one marble is green, and one marble is red.
A. 
B. 
C. 
D. 