Question

question 30 1 pts in scientific notation, the number 185,000,000 is 1.85 10^8 1.85 10^9 1.85 10^6 185 10^6 185 * 10^8 question 31 1 pts there are 30 students in a classroom. how many significant figures are there in this measurement? one three two infinite

Explanation:

Step1: Convert 185,000,000 to scientific - notation

Scientific notation is of the form $a\times10^{n}$, where $1\leq a<10$ and $n$ is an integer. Move the decimal point 8 places to the left to get $a = 1.85$ and $n = 8$. So, $185000000=1.85\times10^{8}$.

Step2: Determine significant - figures of 30 students

The number 30 is an exact number. Exact numbers have an infinite number of significant figures.

Answer:

Question 30: 1.85×10⁸
Question 31: infinite