Question

Which is the best estimate of -14 1/9 (-2 9/10) ?

a) -42

b) -28

c) 28

d) 42

Answer 1

D. 42

Explanation:

Answer 2

`-14 \, (1)/(9) = - ( (14 * 9))/(9) + (1)/(9) ) = - (127)/(9)`

`-2 \, (9)/(10) = -( (20)/(10) + (9)/(10) ) = - (29)/(10)`
Therefore

`-14 \, (1)/(9) (-2 \, (9)/(10) ) = (- (127)/(9) )(- (29)/(10) ) = (127 * 29)/(90) =40.922`

The closest answer is 42.

Answer: d.