Osbourn 2:1 CountDown to STAAR

1.

• A
• B
• C
• D

2.

• F
• G
• H
• J

3 Richard will increase the amount of time he studies each night from a period of 55 minutes to a period of 75 minutes. By what percentage will Richard increase the amount of time he studies each night? A 73 1/3% B 20% C 20.55% D 36.36%

• A
• B
• C
• D

4.

• F
• G
• H
• J

5. Julisha poured 0.9 liter of water into an empty flask. She boiled the water for 15 minutes then measured the amount of water that remained. She found that 80% of the water remained in the flask. Measured in liters, how much water evaporated?

(a)  

6.

• A
• B
• C
• D

7. Mr. Liáng made a circular tablecloth to cover the top of a table. If the diameter of the tablecloth measures 50 inches, which measurement is closest to the area of the tablecloth?

• F 625 in.^2
• G 1,900 in.^2
• H 3,140 in.^2
• J 7,500 in.^2