Answer:
(B) 1.2 > -6.9
Explanation:
The negative numbers/decimals are always to the left of the 0 on a number line. They are not positive.
The positive numbers are always to the right of the 0 on a number line. They are always greater than negative numbers.
6.9 might be greater than 1.2 if it is a positive number, but if it is a negative number, 1.2 is greater.

The surface element is

and the integral is


###
To compute the last integral, you can integrate by parts:



For this integral, consider a substitution of




and the result above follows.
Answer:
4j+24k
Step-by-step explanation:
Expand by distributing terms.
4j+4\times 6k
4j+4×6k
2 Simplify 4\times 6k4×6k to 24k24k.
4j+24k
4j+24k