Question

A race car driver holds the record for the fastest speed of 219.809 miles per hour. Part A what is 212.809 rounded to the nearest hundredth? Part B which explains how you round 212.809 to the nearest hundreth. A: Since the digit in the hundredths place is less than 5. Keep the digit in the hundreds place then drop the digit in the thousands place B:Since the digit in the thousands place is greater than or equal to the 5 increase the digit in the hundredths place by 1 then drop the digit in the thousandths place.C: Since the digit is less than 5 keep the digit in the tenths place then drop the digit in the hundredths and thousandths place. D: Since the digit in the thousands place is greater than or equal to 5 keep in the digit the hundredths place then drop the digit in the thousandths place.

Answer 1

`Speed = 219.81\ miles/hour`

Explanation:

Given

`Speed = 219.809\ miles/hour`

Solving (a) Approximate to nearest hundredth

`Speed = 219.809\ miles/hour`

`Speed = 219.81\ miles/hour` -- Approximated

See (b) for explanation

Solving (b): Steps for (a)

First, we need to note the digit in the thousandth place value

`Digit = 9`

Since:

`9\geq 5`

We have to increase the digit in the hundredth position by 1

This gives:

`Speed = 219.81\ miles/hour`

Hence:

Option B answers the question