If a line is perpendicular to another, and one slope is -2, what is the slope of the other line

Using two or more complete sentences, describe how you can find a vector parallel to b=-2,3

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.