Can anyone help me with this math equation pleasee?

If you answer right ill give brainliest, : )

Write the equation in logarithmic form 8^x=64

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.