How many times larger is 9 x 10^-4 than 3 x 10^-10? a) 3 x 105 b) 3 x 106 c) 6 x 105 d) 6 x 106

9 x 10^-4: Since the exponent of the scientific notation is negative −4, move the decimal point 4 places to the left. 0.0009

3 x 10^-10: Since the exponent of the scientific notation is negative −10, move the decimal point 10 places to the left. 0.0000000003

Subtract: C) 6 x 105

4+3x is the answer

hope you got it

the answer for the second equation is (4,0)