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IgorLugansk [536]
3 years ago
6

Please help!! Math problem and I don't know how to do it!! 14 points!!

Mathematics
1 answer:
IgorLugansk [536]3 years ago
6 0

Let Brian's steps have a measure of 1, and Richard's steps have a measure of k. Then after each walks 5 steps away from the other, their distance apart is

... 5 + 5k

We are told that distance is equal to 9 of Richard's steps, so is equal to 9k.

... 5 + 5k = 9k

... 5 = 4k . . . . . . . subtract 5k

... 5/4 = k . . . . . . divide by 4

Richard's steps are 5/4 the size of Brian's steps. The appropriate selection is

... b) 5/4

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Daniel wanted to know his approximate score on the final exam for his mathematics class. His professor hinted that his score was
frozen [14]

Answer: 101.69

Step-by-step explanation:

Formula we use to find the z-score :-

z=\dfrac{x-\mu}{\sigma}    (1)

Given : \mu=90

\sigma=7

Daniel's z score : z= 1.67

Let x be the raw score for Daniel's exam grade, then substitute the values of \mu,\ \sigma\ and \ x in (1), we get

1.67=\dfrac{x-90}{7}\\\\\Rightarrow\ x-90=7\times1.67\\\\\Rightarrow\ x=11.69+90=101.69

Hence, the raw score for Daniel's exam grade = 101.69

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3 years ago
An exercise class had 20 people. If each person produced 2,200 BTUs of body heat during the class and the room is 30 ft × 40 ft
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We are given the average body heat  equal to 2200 BTU. In this problem, we are asked to determine the total body heat  in BTU per cubic foot given the dimensions of the room. The volume of the room is 18000 ft3. we multiply the average heat by 20 persons.hence the answer to this problem is 2.44 BTU/ft3. 
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3 years ago
What is the volume of the figure shown?
forsale [732]

Answer:

656.25m^3

Step-by-step explanation:

Also 1/2 is equivalent to 0.5

25*17.5*1.5=656.25

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3 years ago
65 points! PLEASE HELP!!!
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Answer:

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The mean is 83

The median is 87

Removing the outlier change the mean because the mean became higher.

The mean was most affected by the outlier because the mean changed to 86. 31

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3 0
3 years ago
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