0.368 rounded to the nearest tenth is 0.4. To verify this, in order to round to the nearest tenth, you need to look at the hundredths place. In this case, that would be the 6. 6 is greater than 5 so the 3, the tenths place, goes up one number to 4. So your answer is 0.4.
To write 3482000000 in scientific notation. Put down the first number (3) and all numbers that come after it (not 0) put after a decimal point. Then count all of the numbers after the decimal points including 0's and that's your exponent. Like so,
3.482*10^9
Hope this helps!=)
3 sided and have 3 angles