Answer:
D
Step-by-step explanation:
there are 9 digits.
and round it off to the nearest hundred million which is 3.
There are 8 digits before the 3... so 10 gets to the power of 8.___ 10⁸
3,0×10⁸ m.s^-1
Answer: n=0.4 or 2/5
Step-by-step explanation:
The answer would be -84.
Here are the steps I did.
1. Simplify 4 + 8 to 12 ( -7 * 12 )
2. Now lastly simplify and u get -84.
Explanation

When taking derivatives of polynomials, we primarily make use of the power rule.
Power rule.

also, the derivate of a sum is the sum of the derivates
hence

Step 1
apply:

therefore, the answer is