
-------- Edited to include more explanation --------------
1.34 = 1 whole 34 hundredth

Then we simplified it by dividing the numerator and the denominator by 2:

34 divided by 2 will give us 17 and 100 divided by 2 will give us 50:
a parallel line has the same gradient, so the gradient would be 3 1/3
a perpendicular line has the negative inverse gradient of the original (eg. if the original gradient is 4/3 then the perpendicular gradient would be -3/4 (all you have to do is change the +/- sign and flip the fraction), so in your case the gradient of the perpendicular line would be -3/10 (since 3 1/3 = 10/3)
For this case we must find an expression equivalent to:

To express in scientific notation we must take into account that the power will be positive, that is, the decimal is run to the right.
We test each option.
Option A:

If we run the decimal 9 spaces to the left we have:

Option B:
We discard it because the exponent is negative.
Option C:

We run the decimal 6 spaces to the right

Option D:

We run the decimal 9 spaces to the right

Answer:
Option D
Answer:
8.5E-12
Step-by-step explanation:
According to the Question,
Given That, The diameter of an insect cell is 1.7 × 10^-11 meters.
Ariel wants to find the length of the radius of the cell. Radius Is Half of the Diameter.
- Thus, R = D/2 ⇒ (1.7*10^-11)/2 = 0.85× 10^-11
- If she performs the calculations on her calculator is 8.5E-12.