Question

answer it please with explanation
no spams ​

Answer 1

Answer:

19.

i)735000

ii)149600000

iii)000000000069

20

i)4.9*10 raise to the power 5

ii)7.7*10 raise to power -5

iii)2.5*10 raise to power 3

iv)8*10 raise to power -1

Answer 2

Step-by-step explanation:

19.

i) 73.5 x 10⁴

=73.5 × 10000 = 735,000

ii) 149.6 x 10⁶

= 149.6 x 1000000 = 149,600,000

iii) 6.9 x 10-¹¹

= 6.9 x 0.0000000001 = 0.00000000069

20.

i) 490000

=4.9 x 10⁵

ii) 0.000077

= 7.7 x 10-⁵

iii) 2500

= 2.5 x 10³

iv) 0.8

=8 x 10-¹

So the thing is that 10⁴ means 10x10x10x10 which is 10000 so just multiply 73.5 by 10000 or simply move 4 places (because there are 4 zeroes) and write the answer.

And when we come to the negative exponent it represents dividing by the number of zeroes For Example 10-⁵ means writing 1 then moving five places backward (because its division) so then it will become 0.00001