Help me please A triangle has two sides of length 4 and 7. What is the smallest possible whole-number length for the third side?

Can someone me with my hwplz(only the circled ones)

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label

You buy 4 items that cost 2.69 14.45 8.05 13.95 what is the estimated total round to the nearest dollar