Scott likes to run long distances. He can run 20 km in 85 minutes. He wants to know how many minutes (m) it will take him to run
1 answer:
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Answer:
Step-by-step explanation:
We have three similar triangles:
therefore the sides are in proportion:
We have AD = a, CD = 16 and BD = 4. Substitute:
<em>cross multiply</em>
and other proportion:
We have AB = b, BC = 16 + 4 = 20 and BD = 4. Substitute:
<em>cross multiply</em>
Answer:
Option A is correct.
0.7734.
Step-by-step explanation:
Definition: z-score indicates that how many standard deviations an element is from the mean.
It can be calculated from the following formula.
where;
z is the z-score,
X is the value of the element,
is the mean, and σ is the standard deviation.
To interprets z- score:
- if a z-score < 0, it represents an element less than the mean.
- if a z-score > 0, it represents an element greater than the mean.
- if z-score = 0, it represents an element equal to the mean.
Given: z < 0.755
then,
to find the value of z, look up the standardize normal distribution to the left of a z-score.
we get
z = 0.7734