A piece of gravel is kicked from the roof of a building, 240 feet above the ground. After t seconds, the piece of gravel has fallen 16t^2 feet. How far from the ground is it after 3 seconds?

7. 153.86 ft

8. 12.56 ft

9. 78.5 m

10. 379.94 in

11. 132.665 m

12. 12.56 yd

13. 226.865 ft

14. 113.04 ft

15. 63.585 ft

16. 254.34 m

17. 50.24 cm

step-by-step explanation:

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me

step-by-step explanation:

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72