The circumference of a circle measures 12.56 inches. what is the measure of the radius of the circle?

a. 2in
b. 3.14in
c. 4in
d. 6.28in

Which measurement is the most precise? a) 29 cm b) 28.8 cm eliminate c) 28.76 cm d) 28.762 cm

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.