add 7.3*10^7.wich is the correct sum
9.1*10^14
8.1*10^7
9.1+10^7
9.1*10^7
The correct sum of 7.3*10^7 and 9.1*10^7 is 1.46*10^8.
To add 7.3 * 10^7 to a given number, we need to add the numbers in scientific notation. Here are the steps to follow:
Step 1: Convert the given number to scientific notation if it is not already in that form.
7.3 * 10^7 (already in scientific notation)
Step 2: Add the two numbers together:
7.3 * 10^7 + 9.1 * 10^7
Step 3: To add the numbers, the exponents must be the same. In this case, both exponents are 7.
Step 4: Add the coefficients: 7.3 + 9.1 = 16.4
Step 5: Write the sum in scientific notation:
The correct sum is 16.4 * 10^7.
So, the correct sum is 16.4 * 10^7.
To find the sum of 7.3*10^7, you need to add it to another number expressed in scientific notation. Let's go through the options one by one:
Option 1: 9.1*10^14
To add these two numbers, you need to make sure they have the same exponent. In this case, you can rewrite 9.1*10^14 as 0.91*10^15 since you need to move the decimal place once to the right to match the exponent of 7.3*10^7. Now you can add them:
7.3*10^7 + 0.91*10^15 = 7.3*10^7 + 0.091*10^16 = 7.391*10^7 + 0.091*10^16 = 0.091*10^16 since 7.391*10^7 is approximately equal to zero in comparison to 0.091*10^16.
The correct sum is 0.091*10^16.
Option 2: 8.1*10^7
Using the same method as above, you can add these two numbers:
7.3*10^7 + 8.1*10^7 = (7.3 + 8.1)*10^7 = 15.4*10^7 = 1.54*10^8 since you need to move the decimal place once to the left to match the exponent of 10^7.
The correct sum is 1.54*10^8.
Option 3: 9.1+10^7
Here, you don't have both numbers in scientific notation, so you can't directly combine them. To proceed, you need to rewrite 9.1 as a number in scientific notation:
9.1 = 9.1*10^0
Now you can add the numbers:
9.1*10^0 + 10^7 = 9.1*10^0 + 1*10^7 = (9.1 + 1)*10^7 = 10.1*10^7 = 1.01*10^8
The correct sum is 1.01*10^8.
Option 4: 9.1*10^7
This is the original number given. If you want to find the sum of 7.3*10^7 and itself, you can simply multiply it by 2:
9.1*10^7 + 9.1*10^7 = 18.2*10^7 = 1.82*10^8 since you need to move the decimal place once to the left to match the exponent of 10^7.
The correct sum is 1.82*10^8.
So, based on the given options, the correct sum of 7.3*10^7 is 1.82*10^8.