Answer:
≈ 1833
Step-by-step explanation:
To find ratio of proton mass to electron mass, we have to divide.
The numbers are given in <em>scientific notation</em>.
Let a number be
and another be
, when we divide, we will follow the rule shown below:

Now, we use the information given to find the ratio:

This means we can find the number by taking 4 decimal places to the right, so that would becomes:

The approximate ratio is 1833 [mass of proton is around 1833 times heavier than mass of electron]
Answer:
315
Step-by-step explanation:
Area = Length x Width
Area = 21 x 15
Area = 315
6z-7z/5=3
(30z-7z)/5=3
30z-7z=15
23z=15
z=15/23
21.W hich value of y makes the following equatoin true?
answer:B