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luda_lava [24]
3 years ago
5

PLEASE ANSWER ASAP

Mathematics
1 answer:
-Dominant- [34]3 years ago
5 0

Answer:15/1


Step-by-step explanation: 300 Divided by 20 is 15 and i believe that is the answer im sorry if i am wrong


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If the heights of 300 students are normally distributed with mean 68.0 inches and standard deviation 3.0 inches, how many studen
Lunna [17]
Given:
μ = 68 in, population mean
σ = 3 in, population standard deviation

Calculate z-scores for the following random variable and determine their probabilities from standard tables.

x = 72 in:
z = (x-μ)/σ = (72-68)/3 = 1.333
P(x) = 0.9088

x = 64 in:
z = (64 -38)/3 = -1.333
P(x) = 0.0912

x = 65 in
z = (65 - 68)/3 = -1
P(x) = 0.1587

x = 71:
z = (71-68)/3 = 1
P(x) = 0.8413

Part (a)
For x > 72 in, obtain
300 - 300*0.9088 = 27.36

Answer: 27

Part (b)
For x ≤ 64 in, obtain
300*0.0912 = 27.36

Answer: 27

Part (c)
For 65 ≤ x ≤ 71, obtain
300*(0.8413 - 0.1587) = 204.78

Answer: 204

Part (d)
For x = 68 in, obtain
z = 0
P(x) = 0.5
The number of students is
300*0.5 = 150

Answer: 150

3 0
3 years ago
At homecoming, 125 tickets where sold. Tickets purchased for homecoming cost $20.5 without an activity card, and $15.75 with an
ale4655 [162]

Answer:

Nearly 83 students did not had activity card.

Nearly 42 students had an activity card.

Step-by-step explanation:

Total number of tickets sold at homecoming = 125

Cost of each  ticket without activity card = $20.5

Cost of each  ticket with activity card = $15.75

Total amount earned  = $2365

Let, the number of tickets sold without activity car d  = k

So, the number of tickets sold without card = (Total sold - k)

                                                                          = 125 - k

Now, according to the question:

$20.5(k) + $15.75(125 - k)  =  $2365

or, 20.5 k + 1968.5 - 15.75 k = 2365

⇒ 4.75 k = 2365 - 1968.5 = 396.5

⇒ k = \frac{396.5}{4.75 }  = 83.47

Hence, nearly 83 students did not had activity card.

So,the number of students that had activity card = 125 - 83.47 = 41.53 ~  42

Hence, nearly 42 students had an activity card.

4 0
3 years ago
What is 1+1+4+^6+7+5+2+1+1+1
g100num [7]

━━━━━━━☆☆━━━━━━━

▹ Answer

<em>4115</em>

▹ Step-by-Step Explanation

1 + 1 + 4⁶ + 7 + 5 + 2 + 1 + 1 + 1

1 + 1 + (2²)⁶ + 7 + 5 + 2 + 1 + 1 + 1

= 4115

Hope this helps!

CloutAnswers ❁

━━━━━━━☆☆━━━━━━━

7 0
3 years ago
Read 2 more answers
Which equation represents a proportional relationship?
elixir [45]

Answer

y=2/3

Step-by-step explanation:

between two variables when their ratios are equivalent

6 0
3 years ago
I Forgot All About Area and Perimeter Can Anybody Help Please?
Zinaida [17]
So you would multiply the length times width!
7 0
3 years ago
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