What is (6.91 x 10-2 power) + (2.4 x 10-3 power) ? Express your answer in scientific notation.
Uhm, if you want it correct then do these step,
(6.91 x 10-2 power) + (2.4 x 10-3 power)= 0.691+2.4 = 3.091 x 10-3 power
we move . from 6. to 0.6 because the power isn't the same so we add the lower power by moving dots and +1 the power or -1 if Neg^.
can't add these numbers till you get their powers of 10 to match. So, doing that, we get
6.91x10^-2 - 0.24x10^-2 = 6.67x10^-2
To find the sum of these two numbers expressed in scientific notation, we can follow these steps:
Step 1: Add the numbers without their exponents.
6.91 x 10^-2 + 2.4 x 10^-3
Step 2: Adjust the exponents to be the same. In this case, we can change both exponents to -2 (the smaller exponent).
6.91 x 10^-2 + 2.4 x 10^-3 = 0.0691 x 10^-2 + 0.0024 x 10^-2
Step 3: Add the numbers we obtained by adjusting the exponents together.
0.0691 x 10^-2 + 0.0024 x 10^-2 = 0.0715 x 10^-2
Step 4: If necessary, simplify the number by adjusting the decimal point to have only one digit to the left of the decimal.
0.0715 x 10^-2 = 7.15 x 10^-3
Therefore, the sum of (6.91 x 10^-2) + (2.4 x 10^-3) is 7.15 x 10^-3 (expressed in scientific notation).