95% of red lights last between 2.5 and 3.5 minutes.
<u>Step-by-step explanation:</u>
In this case,
- The mean M is 3 and
- The standard deviation SD is given as 0.25
Assume the bell shaped graph of normal distribution,
The center of the graph is mean which is 3 minutes.
We move one space to the right side of mean ⇒ M + SD
⇒ 3+0.25 = 3.25 minutes.
Again we move one more space to the right of mean ⇒ M + 2SD
⇒ 3 + (0.25×2) = 3.5 minutes.
Similarly,
Move one space to the left side of mean ⇒ M - SD
⇒ 3-0.25 = 2.75 minutes.
Again we move one more space to the left of mean ⇒ M - 2SD
⇒ 3 - (0.25×2) =2.5 minutes.
The questions asks to approximately what percent of red lights last between 2.5 and 3.5 minutes.
Notice 2.5 and 3.5 fall within 2 standard deviations, and that 95% of the data is within 2 standard deviations. (Refer to bell-shaped graph)
Therefore, the percent of red lights that last between 2.5 and 3.5 minutes is 95%
110 could possibly be the answer, i don’t know tho.
The only sensible choice is
Using the compass measure between points S and N, draw an arc to the right of line m, centered at T, intersecting the edge of circle P.
_____
Whether this will actually do what Gerald wants depends on several things:
• point Q being on line L
• point N being to the right of line M
• the intersection point of the drawn arc and circle P being point R.
We presume these things would be resolved by an attached diagram (missing here).
Hello!
Let's use 'v' for videos and 'c' for CDs.
The inequality that would represent this situation would be:
9v + 7c < 35
No, Satchi does NOT have enough money to buy 2 videos and 3 CDs.
