A boat traveled 27 miles in 2 hours. At this rate, how many miles will the boat travel in 1 half hour? 6 3 over 4 mi

13 3 over 4 mi

3 3 over 8 mi

24 1 half mi

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).

Graph y = -|x| + 2. click on the graph until the correct one appears.

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.