Question

The product of which expression contains four decimal places?

Answer 1

The answer is D. 14.2*0.784 We do not have to multiply these number to tell the number of decimal places of the product.

The product of a set of number will have the sum of the decimal places of the factors. For example, in 

(A) 5.3478x6.4214 ⇒ 4+4= 8 decimal places 

(B) 6.4x3.82           ⇒1+2= 3 decimal places

(C) 521x3.82          ⇒ 0+2 = 2 decimal places. 

(D) 14.2x0.784       = 1+3= 4 decimal places

Answer 2

Answer 
(D) 14.2x0.784

Explanation
We do not have to multiply these number to tell the number of decimal places of the product.
The product of a set of number will have the sum of the decimal places of the factors. For example, in 
(A) 5.3478x6.4214 ⇒ 4+4= 8 decimal places 
(B) 6.4x3.82           ⇒1+2= 3 decimal places
(C) 521x3.82          ⇒ 0+2 = 2 decimal places. 
(D) 14.2x0.784       = 1+3= 4 decimal places. 

the correct answer is (D) 14.2x0.784  

Answer 3

The answer is D. 14.2*0.784 We do not have to multiply these number to tell the number of decimal places of the product.

The product of a set of number will have the sum of the decimal places of the factors. For example, in 

(A) 5.3478x6.4214 ⇒ 4+4= 8 decimal places 

(B) 6.4x3.82           ⇒1+2= 3 decimal places

(C) 521x3.82          ⇒ 0+2 = 2 decimal places. 

(D) 14.2x0.784       = 1+3= 4 decimal places