Express the product of 4.0 x 10^-2 m and 8.1 x 10^2 m using the correct number of significant digits

The product of two expressions is 32.40

Step-by-step explanation:

Two numbers given are and

and we have to express the multiplications of these two numbers.

In this question we will multiply the numbers and add the powers of 10s.

So multiplication gives us

So we can express the product as 32.40

32 (two significant figures)

Step-by-step explanation:

We are given these two numbers written in scientific notations and we are to find their product, using the correct number of significant digits:

4.0 x 10^-2m and 8.1 x 10^2 m

Here, the exponents will cancel each other as one is negative and the other one is positive so we will be left with:

4.0 x 8.1 = 32.4

To two significant figures, it will be 32.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column