Which of the following statements about semi-empirical methods are true:
It combines a theoretically sound model of bonding with some experimentally determined parameters.
It gives an exact solution to quantum mechanical equations.
It treats bonds simply as springs.
It is faster to calculate than ab initio methods.

It combines a theoretically sound model of bonding with some experimentally determined parameters

It is faster to calculate than ab initio methods.

step-by-step explanation: Semi-emperical methods are fast and accurate in giving computational result for large molecules. Semi-emperical methods combines theoretically sound models of bonding with some experimentally determined parameters. It is based on Hartree-fock calculation,it is about the simplest form of Hartree-fock calculation It is also faster to calculate than ab initio methods.

stew reads at the fastest rate of 265 words per minute.

step-by-step explanation:

it's a given that felicia reads at 260 word per minute and on connie's graph we can see that she reads 200 words per minute. since stew's table tells us that he read 795 in 3 minutes, we can divide 795 by 3 to find out how many words he reads per minute.

795/3 = 265

stew reads 265 words per minute - he reads at the fastest rate since felecia reads at 260 words per minute and connie reads at 200 words per minute.

stew (265) > felecia (260) > connie (200)