82.8cm measured to the nearest tenth of a cm

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a. p.

The length of an intercepted arc of a central angle of a circle is 4 cm. if the radius of the circle is 5 cm what is the measurement of the central angle to the nearest whole degree