The graph below shows the distribution of students grades on their last math test. Based on the Empirical rule, what percent of
students made..
*btwn 80 n 85 on the test?
*btwn 80 n 95 on the test?
* below 85 on the test?
*above an 80 on the test?
*btwn 80 n 85 on the test?
*btwn 80 n 95 on the test?
* below 85 on the test?
*above an 80 on the test?
1 answer:
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Answer:
Audrey can afford 4 hours of lesson.
Step-by-step explanation:
Given that:
Amount Audrey has to spend = $111
Cost of racket = $55
Cost per lesson = $14
Let,
y be the total cost
x be the number of hours
According to given statement;
y = 14x + 55
111 = 14x + 55
111 - 55 = 14x
14x = 56
Dividing both sides by 14
Hence,
Audrey can afford 4 hours of lesson.
Imagine the unit circle. The cot(theta) is a line from (0,1) to (-4,1). Imagine it is part of a triangle with the origin (draw it!).
Then the hypotenuse length is √(1+4²) = √17.
The sine rule says that sin(90)/√17 must equal sin(theta)/4, and sin(90)=1, so
Then the hypotenuse length is √(1+4²) = √17.
The sine rule says that sin(90)/√17 must equal sin(theta)/4, and sin(90)=1, so