How to approximate to 3 significant figures

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000

Acircle has a circumference of 28.36 units what is the diameter of the circle

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class