Answer: 28.5%
Step-by-step explanation:
We know that out of all the vehicles, 20% are red cars, and we have a total that out of all the vehicles 70% are cars, then the probabilty will be equal to the quotient between the percentage of red cars divided by the percentage of cars, this is:
20/70 = 0.285
This means that the probability is 0.285 or 28.5%
You can prove this because if the total number of vehicles is 100, then we have 70 cars and 20 of these cars are red, then the relative frequency is 20/70 = 0.285.
15 degrees- that’s the answer
Answer:
(2,3)
Step-by-step explanation:
Answer:
(a) Y = 129.3x (b) It is an estimate as it may not be a true reflection of a student's height
Step-by-step explanation:
(a) Estimate of the mean height is the sum of the heights of all the students divided by the total number of students.
The question however needs more information for its estimation as 129.3cm is representative and may be the mean height but it was not stated.
However, assuming it is the mean height,
Let the total number of students be x
while Y is the sum of all individual student heights
Mathematically, mean = Y/x
Therefore 129.3 = Y/ x
implying that Y = 129.3x
(b) It is an estimate because computation of the mean gives an average which may not be an exact value. For example, the mean here is 129.3 whereas there will be many heights greater than that and some lesser than that and obviously, there may be no student with height of 129.3 hence it is an estimate.
This distance should be 14.317821
You know this by plugging it into the distance formula which is
D=squareroot (x-x) +(y-y)
The first x and the first y should come from the same coordinate
