Janice rode her bike at an average of 12 miles per hour for 3 hours. renee rode her bike at an average of 14 miles per hour for 2 hours.

which explanation correctly tells how to calculate how many more miles janice rode her bike than renee?

a.
step 1 divide: 12 ÷ 3.
step 2 divide: 14 ÷ 2.
step 3 add the two quotients.

b.
step 1 divide: 12 ÷ 3.
step 2 divide: 14 ÷ 2.
step 3 subtract the two quotients.

c.
step 1 multiply: 12 × 3
step 2 multiply: 14 × 2.
step 3 add the two products.

d.
step 1 multiply: 12 × 3
step 2 multiply: 14 × 2.
step 3 subtract the two products.

The product of two negative rational numbers is always zero sometimes zero never zero

Each of the following data sets has a mean of x = 10. (i) 8 9 10 11 12 (ii) 7 9 10 11 13 (iii) 7 8 10 12 13 (a) without doing any computations, order the data sets according to increasing value of standard deviations. (i), (iii), (ii) (ii), (i), (iii) (iii), (i), (ii) (iii), (ii), (i) (i), (ii), (iii) (ii), (iii), (i) (b) why do you expect the difference in standard deviations between data sets (i) and (ii) to be greater than the difference in standard deviations between data sets (ii) and (iii)? hint: consider how much the data in the respective sets differ from the mean. the data change between data sets (i) and (ii) increased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). the data change between data sets (ii) and (iii) increased the squared difference îł(x - x)2 by more than data sets (i) and (ii). the data change between data sets (i) and (ii) decreased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). none of the above

286 divided by 457.6 what is the quotient?