Which pair of fractions and mixed numbers have a common denominator of 20?

2 3/8 and 3/4
1 5/6 and 2/5
4 1/3 and 1/4
3 3/4 and 7/10

The formula for the lateral area of a right cone is la = rs, where r is the radius of the base and s is the slant height of the cone.which are equivalent equations?

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.