. The price of a man's shirt went from $15 to $20. What was the percent of increase of the price of the shirt? A. 25%
B. 33 1/3%
C. 20%
D. none of these

Ricardo ran the 400 meter race 3 times his fastest time was 54.3 seconds his slowest time was 56.1 seconds if his average time was 55.0 seconds what was his time for the third race

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?