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FromTheMoon [43]
3 years ago
5

If m∠ QOS=58, m∠ POR=61, and m∠ POQ=22 what is m∠ ROS

Mathematics
1 answer:
aleksandrvk [35]3 years ago
4 0

19

Step-by-step explanation:

GIVEN P0R AND P0Q, YOU CAN FIND Q0R, WHICH IS 61-22=39. NOW YOU KNOW Q0S AND Q0R, YOU CAN FIND R0S, WHICH IS 58-39=19

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svetoff [14.1K]

a. What percent of people earn less than $40000?

Solution: Let S be the random variable of a salary of employee (in $), S ~ N(50000,20000). Then the random

variable X =−50000

20000

~N(0,1).

( < 40000) = ( <

40000 − 50000

20000 ) = ( < −0.5) = (−0.5) = 0.3085375.

Here Φ(x) denotes the cumulative distribution function of a standard normal distribution.

Answer: 31%.

b. What percent of people earn between $45000 and $65000?

Solution:

(45000 < < 65000) = (

45000 − 50000

20000 < <

65000 − 50000

20000 ) = (−0.25 < < 0.75)

= (0.75) − (−0.25) = 0.7733726 − 0.4012937 = 0.3720789.

Answer: 37%.

c. What percent of people earn more than $70000?

Solution:

( > 70000) = ( >

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5 0
3 years ago
Kiran surveyed a random sample of students in her school district, and she found these statistics:
kkurt [141]
These statistics are impossible: all students who ride bike and use crossing guard ride a bike, so the proportion of students who ride a bike and use the crossing guard must be less than or equal to the proportion of students who ride a bike. This is not true in the given stats; 0.12 > 0.1
3 0
3 years ago
Read 2 more answers
What would be the actual length, if the length of the model is 25 ft and the scale factor is less
Sidana [21]

Answer:

20ft

Explanation:

You multiply the model length by the scale factor to find the actual length. <u>If the scale factor is less than zero, then the actual size will be smaller than the model</u>. Therefore, your answer would be 20ft.

Specifically, the scale factor is .8 if the actual size is 20ft, 1 if the actual size is 25ft, and 1.2 if the actual size is 30ft.

6 0
3 years ago
HELP 30 POINTS!!!!!
Tamiku [17]

by pythagorean formula, the last side is √(61)

by cos rule

cos A

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5 0
3 years ago
Help plz !!!!!!!!!!!!!!!!! These are so hard
OlgaM077 [116]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
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