Four students working in a group are trying to find a rational number between 1 2 and 7 8 . which student has a correct answer and explanation? a) milo divides 7 8 by 1 2 and gets a possible solution of 7 16 . b) sara converts 1 2 to 4 8 and then determines that 5 8 falls between the two numbers. c) julio cross multiplies and then flips the numerator and denominator to get 14 8 as his solution. eliminate d) mikala adds the numerators and multiplies the denominators and determines that 8 16 is a possible solution.

The investigating team suspected that there were differences in the cost of repairing cars in workshop i and workshop ii. the investigating team suspected that the costs raised by workshop i were greater than workshop ii. for that they tested the repair of 15 cars in each workshop to see the cost of repairs.the decision of the right hypothesis to prove the suspicion above is a. h0 : μ1- μ2­ = 0; ha : μ1- μ2­ ≠ 0 b. h0 : μ1- μ2 ≥ 0; ha : μ1- μ2 < 0 c. h0 : μd ≥ 0; ha : μd < 0 with μd = μ2- μ1 d. h0 : μd = 0; ha : μd ≠ 0 with μd = μ2- μ1 e. h0 : μ1- μ2 = 0; ha : μ1- μ2 ≥ 0