help please

Question

express these values using scientific notation:

A) 0.000000000395

 

B) 24,490,000,000,000

Answer 1

A) First, put the decimal point after the first non-zero number. Then count how many places you moved the decimal from its original location. You moved it 10 spaces to the right. Moving it to the right means that the exponent needs to be negative. You should get 3.95 x 10^-10

 

B) First, put the decimal point after the first non-zero number. Then count how many places you moved the decimal from its original location. In this instance, the decimal point isn't shown, but you know it is after the last zero. You moved the decimal 13 places to the left. Moving it to the left means that the exponent needs to be positive. You should get 2.449 x 10¹³