225/5 x 400/42 x 5/225 = ?

(tiene que estar simplificado al máximo)

Irene bought 3 yards of fabric and a spool of thread for $28.10. if the spool of thread cost $1.25, how much did the fabric cost per yard?

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie