A crane has a cable with a breaking strain of 6400 kg measured to 2 significant figures.
It is used to lift crates which weigh 90 kg measured to the nearest 10 kg.
What is the greatest number of crates that can safely be lifted at one time without breaking the cable?
Some working must be shown.

Given the following similar triangles what is the area of triangle b ? a) 1 b)1.8 c)3.2 d)5

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.