Change the following mixed numbers to improper fractions:
7 1
a. 1Ä c. 5Ä
8 8
3 9
b. 2Ä d. 3ÄÄ
4 16
15 41
a. ÄÄ c. ÄÄ
8 8
11 57
b. ÄÄ d. ÄÄ
4 16
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Determine the number of significant digits in the given approximate number.587,000,000
A. 9 B. 5 C. 3 D. 8
Find the missing angle measure.
A. 23° B. 67° C. 113° D. 46°
Simplify the radical expression by factoring out the largest perfect nth power. Assume that all variables are positive.
A. 6
B. 5
C. 17
D. 4
Solve.The amount of paint needed to cover the walls of a room varies jointly as the perimeter of the room and the height of the wall. If a room with a perimeter of 30 feet and 
walls requires 
of paint, find the amount of paint needed to cover the walls of a room with a perimeter of 35 feet and 8-foot walls.
A. 280 quarts B. 5.6 quarts C. 28 quarts D. 2.8 quarts