On their vacation the Phlak family stopped twice for gas. At the first stop they bought 12.5 gal. At the second stop they bought 14.2 gal of gas. How much gas did they buy altogether

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%

The coverage of a base station of a telecommunication company forms a disk with a radius of (kilometers). let be the distance of a cellphone from a base station. assume that the location of cellphones in use are randomly uniformly distributed within the disk. calculate the mean and variance for the random variable.