Find the area, to the nearest hundredth, of the indicated region of the standard normal distribution. The region where z < 2.71

Can some one me with this math problem?

Most animals give birth during a general time of year. this is because animals naturally breed so that their young will be born at the time of year when there will be adequate food supply. the bar graph shows the number of live births of a jackrabbit native to california over the course of year x. based on the data, which of the following would be an appropriate conclusion? a) in general, rabbits give birth during the spring months b) in general, rabbits give birth during the summer months c) in general, m california jackrabbits give birth during the spring months d) in general, california jackrabbits give birth during the summer months

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15