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galina1969 [7]
3 years ago
5

iq scores are normally distributed with a mean of 100 and a standard deviation of 15. What percentage of people have an IQ betwe

en 130 and 100 a)13.5% b)47.5% c)95% d)27%
Mathematics
1 answer:
Natalija [7]3 years ago
3 0

Answer:

"approximately 47.%"

Step-by-step explanation:

Using the statistical function normalcdf( on my old TI-38 calculator:

normalcdf(100,130, 100, 15) returns the fraction 0.477,

so the final answer here is "approximately 47.%"

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How to solve for a missing side length of a triangle (NOT a right triangle) when one side is 4m and another side is 3m, and the
Alenkasestr [34]

Answer:

c ≈ 6.08 m

Step-by-step explanation:

Your question is how to solve for a missing side length of a triangle when given 2 sides length and an angle. The side length can be solved using the cosine rule . We use cosine rule to find the length of a side of a triangle when given two sides and an included angle.

The cosine rule formula for finding a side length are as follows

c² = a² + b² - 2ab cosC

b² = a² + c² - 2ac cosB

c² = a² + b² - 2ab cosC

Using cosine rule

c² = 4² + 3² - 2 × 4 × 3 cos 120°

c² = 16 + 9 - 24 cos 120°

c² = 25 - 24 (-0.5)

c² = 25 + 12

c² = 37

square root both sides

c = √37

c = 6.0827625303

c ≈ 6.08 m

4 0
3 years ago
Multiply and combine like terms to determine the product of these polynomials. (3x−6)(4x+1)
icang [17]
0.12 I think I’m not sure how to do this I ji at have an idea maybe I’m super wrong
5 0
3 years ago
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What is the measure of 143°<br> 61°<br> Enter the answer in the box.
Keith_Richards [23]

Answer:

angle CAB=37° angle ABC=82°

5 0
2 years ago
MiKiyah invested $2,500 in a simple interest account for 2 years. At the end of the 2 years, she has earned $75 in interested. W
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Answer:

if $178 $178 interest was earned in 2 2 years at an interest rate of 4%

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2 years ago
What is the slope of the line y - 5 = -4(x - 8)?
galben [10]

Answer:

-4

Step-by-step explanation:

This looks like point-slope form, which I find personally hideous. Let's change it to slope-intercept form to ease my conscience. (remember that slope-intercept form is y=mx+b, where m=slope and b=y-intercept!)

y - 5 = -4(x-8)

y - 5 = -4x + 32

y = -4x + 37

It's in slope-intercept form now! And -4 looks to be our m.

<u>So the slope is -4.</u>

4 0
4 years ago
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