#### Answer

(a) $1.85$
(b) $88.2$
(c) $0.00474$
(d) $8810$
(e) $1.83$

#### Work Step by Step

1. Identify the fourth significant figure (the one we are going to drop):
(a) $1.85\underline 4$
(b) $88.2\underline 0 38$
(c) $0.00473\underline 8 265$
(d) $880 \underline 7$
(e) $1.83 \underline 2$
2. Remove* the fourth SF and all the digits to its right. If this digit is greater or equal to 5, add 1 to the third digit.
* If the digits are on the left of the decimal point, just substitute them with a "0".
(a) $1.85$
(b) $88.2$
(c) $0.00474$
(d) $8810$
(e) $1.83$