What is the amplitude, period, and phase shift of f(x)=-4 sin (2x+3.14)-5

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Can someone answer this question? : )

Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.