Answer:
B
Step-by-step explanation:
because the numbers 0-9 consist of 10 numbers,
having a 70% chance of success means that out of the 10 numbers, 7 are correct.
thus, choice B is correct as it have 7 numbers in it
(rmb to count "0" as a number!)
Let 'x' represent the total distance from point A to point B
During the first hour he gets 0.25 of the way there: 0.25x
During the second hour he covers an additional 0.2 of the distance: 0.2x
During the third hour, he covers 0.3 of the distance: 0.3x
The total distance the biker traveled is:
0.25x + 0.2x + 0.3x = (0.25 + 0.2 + 0.3)x = 0.75x
The biker has: x - 0.75x = (1 - 0.75)x = 0.25x of the total distance left to go.
Let x be the expensive scarf. The other scarf costs x-3.
x + (x-3) = 25
2x = 28
x = 14
Answer: 14
Using a trigonometric identity, it is found that the tangent of the angle is of:
<h3>How to find the sine of an angle given the cosine, or vice versa?</h3>
The sine and the cosine of the angle are related according to the following identity:
For this problem, the sine is given by:
Hence the cosine is found as follows:
On the third quadrant the cosine is negative, hence:
<h3>What is the tangent of an angle?</h3>
The tangent of an angle is given by the sine divided by the cosine, hence:
More can be learned about trigonometric identities at brainly.com/question/26676095
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