Question

how can we write 4 to exactly five significant figures? 4.0000x10^1 4.0000 both of these are correct neither of these is correct how many milliseconds are in 3.6 kiloseconds? 0.036 milliseconds 0.00,036 milliseconds 3,600,000 milliseconds 360 milliseconds 3600 milliseconds

Explanation:

Step1: Recall significant - figures rule

In scientific notation $4.0000\times 10^{0}$ and decimal form $4.0000$, both have five significant figures. The zeros after the decimal point are significant as they are measured or known values.

Step2: Recall unit - conversion factor

We know that $1$ second = $1000$ milliseconds and $1$ kilosecond = $1000$ seconds. So, $1$ kilosecond=$1000\times1000 = 10^{6}$ milliseconds.

Step3: Convert 3.6 kiloseconds to milliseconds

Multiply 3.6 by the conversion factor. $3.6$ kiloseconds $\times10^{6}$ milliseconds/kilosecond = $3600000$ milliseconds.

Answer:

First question: C. Both of these are correct
Second question: C. 3,600,000 milliseconds