1. Find 2 arithmetic means between 12 and 21.

1 answer:

Nookie1986 [14]3 years ago

8 0

I believe it would be 16.5, since you add 12+21=33 then divide it by however many numbers you have (this case it’s 2) and divide it by 2, which equals 16.5

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Kim ran 2.76 miles on Monday, 2.34 miles on Tuesday, and 1.97 miles on Wednesday. Use front-end estimation to estimate the total

Mandarinka [93]

Kim ran total 7.1 miles.

Further explanation:

Front end estimation is the specific technique for rounding off numbers to estimates sums and differences. The numbers to be added or subtracted are rounded off to nearest one, tenth and hundredth.

So in the given scenario, we will round off to the nearest tenth.

So,

2.76 miles will be rounded off to 2.8 as the number right to the digit 7 is greater than 5, 7 will be rounded off to the next digit.

2.34 miles will be rounded off to 2.3 as the number right to 5 is less than 5, so 3 will be as it is.

1.97 miles will be rounded off to 2.0 as the number right to 9 is greater than 5 so it will be rounded off to the next number.

So, after estimation

$2.8+2.3+2.0 = 7.1\ miles$