7. We should already know how
to convert 15000 to scientific
notation, from the two
exercises 7-sn-1 and 7-sn-2.
If 15000 is to become 1.5, the
decimal point has to move 4
times to the left, so the
exponent is 4.
The second answer is 1.5 *
10'4.
If we send 1.5e4, it will be
marked as wrong. The “e”
notation is only for the
calculator.
14. If 0.0000013 is to become 1.3,
the decimal point has to move
6 times to the right, so the
exponent is -6.
The second answer is 1.3 *
10'-6.
If we send 1.3e-6, it will be
marked as wrong. The “e”
notation is only for the
calculator.
15. I wanted a multiplication for
the next example but got
another subtraction. At least
you get the idea.