Plz need help with 7 ,8 ,9 ,10 i will give 50 points

What is the difference between regular convex and concave polygons

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

The trigonometric ratios sine and secant are reciprocals of each other