#### Answer

(a) Estimate 72 inches
Exact 71 inches
(b) No

#### Work Step by Step

$17 \frac{3}{4} \times 4$
Estimate
Round to nearest whole number.
$18 \times 4 = 72$
Exact
Convert to improper fraction
$\frac{71}{4} \times \frac{4}{1}$
Reduce by common factor of 4 and multiply.
$frac{71}{1} \times frac {1}{1}$ = $71 \times 1$ = 71
(b) Convert 6 feet to inches.
$6 \times 12 = 72$
$72 \lt 71$ so a 6ft tall mechanic will not be able to walk under the vehicle without bending down.