Question

(i) 1.8 x 1012; 3.7 x 109​

Answer 1

Answer:

write a large number in scientific notation, move the decimal point to the left to obtain a number between 1 and 10. Since moving the decimal point changes the value, you have to multiply the decimal by a power of 10 so that the expression has the same value.

Let’s look at an example.

180,000. = 18,000.0 x 101

1,800.00 x 102

180.000 x 103

18.0000 x 104

1.80000 x 105

180,000 = 1.8 x 105

Notice that the decimal point was moved 5 places to the left, and the exponent is 5.

Answer 2

$(i) 1.8 \: x \: 1012; 3.7 \: x \: 109$