Your family takes a trip to the train station. The taxi fare is $17.85. You pay the taxi driver a 18% tip. How much will he get for a tip? Please help

What is the number 321,000,000 in scientific notation? also what is the number? ?

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

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.