Question

Divide 12.936 by 3.2 using the correct number of significant digits.
A. 4.0425
B. 4.043
C. 4.0
D. 4.04

Answer 1

Answer:

answer is B) 4.043

Step-by-step explanation:

you can check your answer

by multiplication

= 4.043×3.2

= 12.936 proved correct✅

so you answer is B)

please make me brainist

Answer 2

☯ AnSwEr :

As, we have to find the Division of 12.936 and 3.2, Using significant digits.

So,

★ Number of significant digits in 12.936 = 5

★ Number of significant digits in 3.2 = 2

Now, we will calculate their product.

→ Division = 4.0425

$\Large{\implies{\boxed{\boxed{\sf{Division = 4.0425}}}}}$

So, option A is correct.

$\rule{200}{2}$

★ Additional Information :

☯ Uncertaininty in measurment

When true value is not equal to experimemtal calculations then there os uncertainty in measurment.

↪ For example 2g of $\sf{H_2}$

Molecules = 602,200,000,000,000,000,000,000

But if we write (602,200,000,000,000,000,000,000) as 6.022 × 10²² then our uncertainty in measurement can reduce.

$\rule{100}{2}$

Now, Mass of H atom.

0.00000000000000000000000166

But if we write (0.00000000000000000000000166) as 6.61 $\times 10^{-25}$ then our uncertainty in measurement can reduce.

→ Meaningful to present the data, realisitiolly accurating with uncertainity.

$\rule{150}{2}$

★ There are three ways to reduce the uncertainty in measurement.

(i) Scientific Notation

(ii) Significant figures

(iii)Dimensional analysis