Round 35007 to nearest hundred

How many square feet of out door carpet will we need for this hole? 8ft 3ft 12ft 4ft

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

How do i multiply two digit numbers