Math help urgent

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I have a few questions that i need help with so can someone pleese help me thanks:)

1. represent each with an ineqaulity
a.) time spent on the activity can be at most 13 mins
b.) the volume of the container must be a minimum of 1.8 L and a max of 2.5 L

2. in canada by law any product sold as a nutritional supplement or meal replacement must provide a minimum of 225kcal of energy per serving

a.) if c represents the energy content of one serving write an inequality to represent this regulation

3. Danlielle's track coach tells the team that to be considered for the 100 meter race a runner has to be able to run 100m in less than 13s. draw and lable a numer line to repsent this.

4. on saltspring island in british columbia the height of the tide varies one day from a low of 0.8m to a high of 3.2m

a.) what type of ineqaulity do you need to use to show the range of tide heights

b.) express this situation algebraically

thank you so much :)

• Math help urgent - ,

This should give you a start.

1a. tÂ ≤ 13

1b. 1.8 ≤ v ≤ 2.5