Thanks for participating in this year's Math Matters to the Mavs and Boston Market Contest. Following are the answers to this year's questions, check them out to see how you did! All 10 Winners will be contacted by Friday, March 11th. Special thanks to The Dallas Morning News Newspapers In Education for their assistance with this year's program!

Congratulations to this year's winners:
Amy B. - Murphy Middle School
Monica B. - W.H. Gaston Middle School
Jasmyne D. - Adell Turner
Casey H. - Mabank High School
Cedric H. - Community Intermediate
Lora O. - Robinson Middle School
Tommy R. - Marcus High School
Charsetta R. - Thomas Edison
Jackelin R. - Greenville Intermediate
Emily W. - Hockaday

1. Last season the Mavs won 52 games and lost 30 games. What was their percentage of wins?

A) 63.4%
B) 57.6%
C) 36.5%
D) 15%

Answer: A
Explanation:
Percentage is calculated by taking the part divided by the whole times 100. In this example, to find the whole you would add 52+ 30 = 82 (total number of games in the season).
Percentage = (52/82)100
Percentage = (.634)100
Percentage = 63.4%

2. The diameter of the rim is used in NBA basketball is 18 inches. What is the circumference of the rim?

Hint: C=d(ð)

A) 28.26"
B) 56.52"
C) 36"
D) 25"

Answer: B
Explanation:
ð = 3.14
Using the formula C=d(ð), C=18(3.14), C=56.52"

3. The year 2005 marks the 25th Anniversary of the Dallas Mavericks. In what year did the Texas franchise begin to pay in the NBA?

A) 1989
B) 1999
C) 1969
D) 1980

Answer: D
Explanation:
The range is calculated by finding the difference between the maximum value and the minimum value in a sample. In this example you would subtract 25 from 2005. 2005-25 = 1980.

4. Michael Finley has the team's highest free throw percentage at 90%. Based on this statistic, if Michael takes 50 free throws, how many should he sink?

A) 48
B) 90
C) 38
D) 45

Answer: D
Explanation:
Percentage is calculated by taking the part divided by the whole times 100. In this example (x) is the number he should make if he sinks 90% of the 50 free throws he takes:
90 = (x/50)100
90/100=x/50
.9(50) = x
45 = x

5. Josh Howard averages 7.1 rebounds per game. Based on this rate, about how many rebounds should he grab in the next 6 games?

A) 43
B) 48
C) 13
D) 35

Answer: A
Explanation:
If he is averaging 7.1 rebounds per game for six games, you multiply 7.1 x 6 = 42.6 (round up to 43 total rebounds)

6. On average, Dirk Nowitzki plays 81% of the game. If a game consists of four 12 minute quarters, about how many minutes would you expect Dirk to play?

A) 81 min.
B) 48 min.
C) 39 min.
D) 25 min.

Answer: C
Explanation:
Percentage is calculated by taking the part divided by the whole times 100. In this example, we are given the percentage, so you would construct the formula utilizing the information that is known. the percentage(81%) is calculated by dividing how many minutes he actually played (Minutes) by how many there are in the game(4 quarters x 12 minutes per quarter) times 100. Therefore:
Percentage = (Minutes played/Minutes in the Game)100
81=[Minutes/(4x12)]100
81/100=Minutes/(4x12)
.81=Minutes/48
.81 x 48=Minutes 38.8 = Minutes played (round up to 39 minutes)

7. What would Jerry Stackhouse's field goal percentage be if he took 25 shots and sank 15?

A) 50%
B) 60%
C) 45%
D) 30%

Answer: B
Explanation: Percentage is calculated by taking the part divided by the whole times 100. In this example, percentage is calculated by dividing how many shots he actually sank by how many he attempted multiplied by 100.
100(15/25) = Percentage
100(.6) = 60%

8. The NBA regulation basketball court is 94 feet long and 50 feet wide. What is the surface area of the court?

A) 288 ft
B) 4700 sq ft
C) 144 sq ft
D) 1000 ft

Answer: B
Explanation:
Surface area is determined by height (H) times width (W):
94 ft x 50 ft = 4700 sq ft