What is 10+(25-10)÷ 5 Please answer now I need the answer
2 answers:
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Question:
Which of the following is a quadrantal angle?
a) π/2 b) π/3 c) 2π/3 D) 4π/5
Answer:
Step-by-step explanation:
Required
Which of a to d is a quadrantal angle
An angle is said to be quadrantal if and only if the angle has its terminal side on the x or y axis.
Such angles (in degrees) are: 90, 180, 270, etc.
So, we have:
[Convert to degrees]
Hence:
is a quadrantal angle
<em>The other options are not.</em>
Answer:
The probability that the three drivers would wear seat belts is 0.5
Step-by-step explanation:
Given
Percentage of drivers using seat belt = 80%
Number of drivers pulled over = 3
Required
Probability that all three drivers wore seat belt
First, the probability that a driver would wear seat belt has to be calculated.
Let's represent that with P(D)
P(D) is equivalent to the percentage of drivers using seat belt
%
Let the probability that the three drivers would wear seat belts be represented as P(All).
P(All) is calculated as thus;
<em>(Probability that the first driver would wear seat belt) and (Probability that the second driver would wear seat belt) and (Probability that the first driver would wear seat belt).</em>
<em></em>
<em>Mathematically, this means</em>
Substitute
--- Approximated
Hence, the probability that the three drivers would wear seat belts is 0.5