Please try to help me

)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)

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

What is a graph with a never ending line called?