Answer: x = 6.56
Step-by-step explanation: -0.4x - 0.5 + x = 3.63
-0.4x^2 - 0.5 = 3.63
-0.4x^2 = 4.13
0.63x = 4.13
x = 6.56
Answer:
21 degrees
Step-by-step explanation:
The inscribed angle theorem states that when two cords (lines in a circle) make contact with the circumference of the circle (outer edge), and the two cords do not pass through the center of the circle, then the angle between the two cords is equal to half of the length of its surrounding arc. This means that the measure of arc (WV) is half of the measure of angle (WXV). Therefore, one can form an equation and solve for the length of the arc (WV).
2 (WV) = (m<WXV)
Substitute,
2 (WV) = (42)
Inverse operaitons,
2 (WV) = (42)
/2 /2
(WV) = 21
Fraction: 26/3
Decimal: 8.6
<h3>
Answer: Less than</h3>
=========================================================
Explanation:
To convert from a percent to a decimal, move the decimal point over 2 spots to the left
25% = 25.0% converts to 0.25
Think of 0.3 as 0.30
Comparing 0.25 and 0.30, we see that 0.25 is smaller. This is because 25 is smaller than 30.
---------------------
Put another way:
0.3 = 0.30 = 30%
We can see that 25% is smaller than 30%
---------------------
Whichever method you prefer, 25% is smaller than 0.3
Answer:
2.7 PM
Step-by-step explanation:
Since, the rate of spread is proportional to the product of fraction y of people who have heard the rumour and the fraction who have not heard,
Integrating both sides,
If t = 0, ( at 8 AM ), y =
Now, at noon, i.e t = 4, y =
If
Using graphing calculator,
t ≈ 6.722,
Hence, after 6.722 hours since 8 AM, i.e. on 2.7 PM ( approx ) the 90% of the population have heard the rumour.