Round 4,657.14688 to the nearest thousandth. 4,657.146 4,657.150 4,657.147 5,000

the thousandths place is the 3 digit to the right of the decimal.

(decimal)      tenths     hundredths     thousandths  

6 is in the thousandths place.

the digit to the right of 6 is "5 or greater" so round the 6 up to 7.

C) 4,657.147  

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)