Question

R=x^2/y

x=3.8x10^5
y=5.9x10^4

Work out the value of R

Give your answer in standard form to an appropriate degree of accuracy.

My efforts:
(3.8x10^5)^2/5.9x10^4=
144400000000/59000=
2447457.62712=
2.44745762712x10^6 but this is wrong.

What have I done wrong??

Answer 1

Explanation:

Your work is correct, but you need to round. x and y have 2 significant figures, so round your final answer to 2 significant figures:

2.4×10⁶