Question

Work out (5x10^3) x (9x10^7) and give your answer in standard form.

a) 45 x 10^10
b) 450 x 10^9
c) 4.5 x 10^9
d) 45 x 10^6

Answer 1

To work out (5x10^3) x (9x10^7), multiply the numbers together and add the exponents together. The answer is 45 x 10^10.

Step-by-step explanation:

To work out (5x10^3) x (9x10^7), we can combine the numbers and the exponents separately. The numbers 5 and 9 can be multiplied together to give 45.

The exponents 3 and 7 can be added together to give 10. Therefore, the answer is 45 x 10^10.