Why is it important for marine life that ice floats (it is less dense than liquid water)?

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55

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.