If T = pi (R²-r²),
find t when R=4
and r=3

Which system of linear inequalities is graphed? can somebody pleasssse

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

Sarah used her calculator to find sin 125 degrees. she wrote down sin sin125 degrees.57. how could sarah recognize that her answer is incorrect?