CD/DB=AC/AB
DB=3.8; AC=4.6; AB=6.8
CD/3.8=4.6/6.8
Solving for CD:
CD=3.8*4.6/6.8
CD=2.570588235
Rounded to one decimal place:
CD=2.6
Answer: The length of CD is 2.6
Answer:
x ≈ 0.916875
Step-by-step explanation:
→ Equate the expressions to each other
4x³ + 3x - 2 = 2x + 2
→ Get all the terms to one side
4x³ + x - 4
→ Solve for x
x ≈ 0.916875
Answer:
She did better on the Math test.
Step-by-step explanation:
14/17 is 82 percent, and 31/19 is only about 80%.
Answer: 95%
Step-by-step explanation:
Given : The results of a national survey showed that on average, adults sleep
hours per night.
Standard deviation:
hours
a) To find : the percentage of individuals who sleep between 3.8 and 11 hours per day.
Note that 
i.e. 3.8 is 2 standard deviations less than the mean value.

i.e. 11 is 2 standard deviations more than the mean value.
According to the empirical rule , about 95% of the population falls within 2 standard deviation from the mean.
⇒ About 95% of individuals who sleep falls within 2 standard deviation from the mean i.e. between 3.8 and 11 hours per day .
Hence, the approximate percentage of individuals who sleep between 3.8 and 11 hours per day = 95%
Answer:
x + 7
Step-by-step explanation:
<u>Step 1: Translate</u>
<em>x</em> = <em>x</em>
more than = addition (+)
7 = 7
<u>Step 2: Combine</u>
x + 7