Question

Cassie added two numbers together on her calculator for her biology homework. The calculator showed the sum as 9.62E-6. She knows she used 0.000009535 as one of the numbers. What number did she add to 0.000009535 to get 9.62E-6?

Answer 1

To find the number that Cassie added to \( 0.000009535 \) to get \( 9.62E-6 \), we can first convert both numbers into the same format.

The number \( 9.62E-6 \) can be expressed as:

\[
9.62E-6 = 0.00000962
\]

Now, we need to set up the equation:

\[
x + 0.000009535 = 0.00000962
\]

where \( x \) is the number we are trying to find. To isolate \( x \), we can rearrange the equation:

\[
x = 0.00000962 - 0.000009535
\]

Now, we will perform the subtraction:

\[
0.00000962 - 0.000009535 = 0.000000085
\]

This result can also be written in scientific notation:

\[
x = 8.5E-8
\]

Thus, the number that Cassie added to \( 0.000009535 \) is

\[
\boxed{8.5E-8}
\]