You need to ask the question while you say you have troubles, But what can I help you with?
7 is 1/10 of 70. You can figure this out by multiplying 7 by 10
I believe the correct answer from the choices listed above is option 2. The element that is found in both carbohydrate and water is the element oxygen. Carbohydrates contain aldehydes and ketones which has oxygen on them and water has hydrogen and oxygen. So, it must be oxygen.
Eighths and their multiples are common fractions which I recommend memorizing, but to actually solve this, you use the literal meaning of a fraction and divide 5 by 8. See the long-division below (it was surprisingly difficult to type, so I hope it helps!).
To round 0.625 to the nearest hundredth, we go to the second decimal place, which is 5, so we round up to 0.63.
4
I HAVE TO WRITE STUFF OR ELSE IT WON;T LET ME POST YOUR ANSWER IS 4