Given:
• AD = 3
,
• DC = 27
,
• BD = x + 3
Let's solve for x.
To solve for x, apply the altitude formula:

Where BD is the altitude.
Cross multiply:

Plug in the values and solve for x:

Take the square root of both sides:

Therefore, the value of x is 6 .
ANSWER:
d. 6
His score changed by 110 points.
Explanation: 3*30=90 & 200-90=110 points
It is going to be 3/10 because you simplify 6 blue/ 20 total marbles
So I = Prt
I for interest charge
P for principal ($4,840)
r for rate (6%)
t for time (2 yrs)
So you would then plug the information into the equation.....
I = 4,840*.06*2
I = 580.80
So the answer to your question is $580.80 which is option B
Hope this helps! :)