Answer:
1 - a/variable
2 - d/statistic
3 - b/population
4 - c/data
5 - e/parameter
6 - f/sample
I did comment asking if the two you'd already selected were definitely correct, but no answer was given, so I apologise if this is wrong. This is what I would put.
the answer is : 3.814697266
Answer:
They are both right-angled triangles.
Step-by-step explanation:

Scientific notation for above vLue is :
(9x 10^-3)^2=
, so d 8.1x10^-6
Evaluate 1/2a^-4b^2 for a =-2 and b=4

A number raised to a negative exponent is sometimes negative.
Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! As well as a great Valentines Day! :-)
- Cutiepatutie ☺❀❤