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2 years ago

7

In a class, 60%, of students are on a sports team and 20%, of students are in the orchestra. If 70%, of students in the class ar

e on a sports team or in the orchestra, what is the probability a student randomly selected from the class is in the orchestra and on a sports team?

1 answer:

Oksana_A [137]2 years ago

6 0

Answer: 10%

I had this same question earlier, 10% is the right answer

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A random sample of the amounts for 22 purchases was taken. The mean was $42.97, the standard deviation was $22.82, and the m

Illusion [34]

Answer: a) 84 and b ) 2084

Step-by-step explanation:

Given : Sample standard deviation : s= $22.82

(Population standard deviation is unknown ) , so we use t-test.

Critical value or the 95% confidence intervals : $t_{n-1}*=2.0$

Formula to find the sample size :

$n=(\dfrac{t^*\cdot s}{E})^2$

a) E = 5

$n=(\dfrac{(2)\cdot 22.82}{5})^2$

$n=(9.128)^2=83.320384\approx84$

i.e. Required sample size : n= 84

b) E = 1

$n=(\dfrac{(2)\cdot 22.82}{1})^2$

$n=(45.64)^2=2083.0096\approx2084$

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2 years ago

8 k+d use k=2 and d=3

sveta [45]

8×2=16

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2 years ago

Write a rule for the function whose graph can be obtained from the given parent function by performing the given transformations

kati45 [8]

ANSWER

$g(x) = {(x + 5)}^{3} + 4$

EXPLANATION

Given the parent function:

$f(x) = {x}^{3}$

If we shift the graph of f(x), 5 units to the left, then the new rule is

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If we again, shift this graph upward by 4 units, then the completely transformed function will have the rule,

$x \to \: {(x + 5)}^{3} + 4$

Or

$g(x) = {(x + 5)}^{3} + 4$

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2 years ago

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posledela

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Step-by-step explanation:

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katrin [286]

Answer:

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Step-by-step explanation:

18/20 = x/20 (similar triangles)

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2 years ago