In Exercises 18 and 19, use the following information. Conversion The formula to convert miles m to kilometers k is m = 1.609k.
18. Write the inverse function, which converts kilometers to miles.
19. How many kilometers is 40 miles? Round to two decimal places.

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

What is the percentile for data value 6 in the following data set? 4 13 8 6 4 4 13 6 4 13 2 13 15 5 9 4 12 8 6 13 40 25 35 62

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax