Aight so like please help me before I fail this test please! TwT

)a smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). what is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

Sketch one cycle if the cosine function y=2cos2theta

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?