16.43 in word form math

What is the volume of a rectangular prism if the length is 10.4 mm the width is 5 mm in the height is 8 mm

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n

The power generated by an electrical circuit (in watts) as a function of its current c (in amperes) is modeled by p(c)= -15c(c-8) what current will produce the maximum power?