Answer: D is correctly written in scientific notation.
Step-by-step explanation:
The base has to be between 1 and 10.
A has a base of 16.4 which is greater than 9.
B is not even in scientific because the base it being raise to an exponent
C has 0.71 as base which is less that.
<u>Given</u>:
Given that two lines are intersecting at the point.
The angles (3x - 8)° and (2x + 12)° are the angles formed by the intersection of the two lines.
We need to determine the equation to solve for x and the value of x.
<u>Equation:</u>
The two angles (3x - 8)° and (2x + 12)° are vertically opposite. Hence, the vertically opposite angles are always equal.
Hence, we have;

Hence, the equation is 
<u>Value of x:</u>
The value of x can be determined by solving the equation 
Thus, we have;

Subtracting both sides of the equation by 2x, we get;

Adding both sides of the equation by 8, we get;

Thus, the value of x is 20.
Hence, the equation and the value of x are 
Thus, Option D is the correct answer.
Answer:
The 84th term of the arithmetic sequence -5,15,35, ... is 1675.
Step-by-step explanation:
The arithmetic sequence -5,15,35, ... increases by 20 per term. Add 20 to the prior term to find the new term. Do this 83 times from -5, and you reach 1675.
The height of an object can be represented as a function of time.
It takes the rocket 25 seconds to hit the ground
The height function is given as:

When the rocket hits the ground, we have:
h(t) = 0
So, the height function becomes

Rewrite as:

Divide both sides by 16t

Hence, it takes the rocket 25 seconds to hit the ground
Read more about height functions at:
brainly.com/question/22573423