Plz help me. Triangle JKL is equilateral. All three interior angles have equal measures.

What is the measure of exterior angle 1?
30 degrees
60 degrees
120 degrees
130 degrees

What is the slope of a line that is perpendicular to y = 3x + 1

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.

If you eat 4 medium strawberries, you get 48% of your daily recommenced amount of vitamin c. what fraction of your daily amount of vitamin c do you still need?