Yes, all whole numbers greater than zero and ending in zero are composite.
No, it is composite.
2500 is a composite number. A prime number has exactly 2 factors, 1 and the number itself. All even numbers greater than 2 (numbers ending in 2, 4, 6, 8, or 0) are composites because they have more than 2 factors.
40 percent of 2500 = 100040% of 2500= 40% * 2500= 0.40 * 2500= 1000
75% of 2500= 75% * 2500= 0.75 * 2500= 1875
79% of 2500 = 79% * 2500 = 0.79 * 2500 = 1,975
56% of 2500 = 56% * 2500 = 0.56 * 2500 = 1,400
20% off $2500= 20% discount applied to $2500= $2500 - (20% x $2500)= $2500 - $500= $2000
33% of 2500= 33% * 2500= 0.33 * 2500= 825
12.5 percent of 2500 = 312.512.5% of 2500= 0.125 * 2500= 312.5
2500
1000 + 2500 = 2500
2500*2500=6250000, so 2500 is the square root of 6250000.