A building that is 300 m tall casts a 270 m
shadow. At the same
time, a different building
casts an 90 m shadow.
How tall is the building?

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

If a is a nonzero real number then the reciprocal of a is

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.