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scZoUnD [109]
3 years ago
13

When Sophia runs the 400 meter dash, her finishing times are normally distributed with a mean of 75 seconds and a standard devia

tion of 1.1 second. What probability of races will her finishing time be between 74.2 and 76.4 seconds?
Mathematics
1 answer:
Dmitry [639]3 years ago
3 0

i really dont know the answer im confuseddd

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You're assuming that this data set represents all of Mrs. Hassaan's pupils. Certain students could be missing from the histogram - for instance, there could be one or two students who missed the test, but for certain reasons will be taking a make-up exam. Their grade would not be recording in this data set, but they still contribute to the class size, and so would be unaccounted for here.

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A gym charges a $20 sign-up fee plus $25 per month.  You have a $120 gift card for the gym. When does the total spent on your gy
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3 years ago
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This week, 967 people went to the beach. Last week, 1,189 people went to the beach. The number of people who went to the beach f
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Answer:

Less than 25%

Step-by-step explanation:

1189 divided by 967 is 1.229576008...

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To be exact it increases by 22.9576008...%

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6 0
2 years ago
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Jasmine's school is selling tickets to a choral performance. On the first day of ticket sales the school sold 11 senior tickets
nikdorinn [45]

If we make s = Senior tickets,  

11s+1s

to find the values of c and s,w

If we express s in terms of c on t

s=21-2c

replacing this value on the first equation, we obtain

11(21-2c)+4c=123\\11.21-22c+4c=123\\231-18c=123\\231=123+18c\\231-123=18c\\108=18c\\c=\frac{108}{18} \\c=6

Placing c=6 on s=21-2c, we have

s=21-2(6)\\s=21-12\\s=9

Thus the senior ticket costs $9 and the child ticket cost $6

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3 0
3 years ago
A line passes through the points (4,19) and (9,24). Write a linear function in the form y =Mx+b for this line
snow_lady [41]
Slope = y2-y1 / x2-x1
= 24-19/9-4
= 5/5
= 1

solve for b
y=1x+b
19=1(4)+b
19=4+b
15=b

the equation of the line is y=x+15
7 0
3 years ago
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