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Misha Larkins [42]

2 years ago

15

Judy needs a mean (average) score of 86 on four tests to earn a midterm grade of B. If the mean of her scores for the first thre

e tests was 83, what is the lowest score on a 100-point scale that she can receive on the fourth test to have a midterm grade of B?

1 answer:

Korvikt [17]2 years ago

7 0

Answer:

The answer is 95

Step-by-step explanation:

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On average 83.1% of welds performed by a particular welder are defective. if, in one day, the welder creates three welds. what i

Nuetrik [128]

Let p be 0.831 denote the percentage of defective welds and q be 0.169 denote the percentage of non-defective welds.

Using the binomial distribution, we want all three to be defective.
$P(X = 3) = \binom{3}{3}(p)^{3}{q}^{3 - 3}$
$P(X = 3) = \binom{3}{3}(0.831)^{3}(1)$
$P(X = 3) = (0.831)^{3} \approx 0.573856191$

4 0

2 years ago

Mandarinka [93]

Answer:0.11111111111

Step-by-step explanation:0.1 with a repeating decimal over the 1 because when you multiply 1/3 by 1/3 thats what you get.

8 0

2 years ago

Naddik [55]

Answer: 530.66 units²

<u>Step-by-step explanation:</u>

$Area_{(circle)}=\pi r^2\qquad and\qquad r=\dfrac{diameter}{2}\\\\\\\implies Area_{(circle)}=\pi \bigg(\dfrac{diameter}{2}\bigg)^2\\\\\\\text{It is given that the diameter = 26:}\\A=\pi\bigg(\dfrac{26}{2}\bigg)^2\\\\\\.\quad =\pi \cdot 13^2\\\\\\.\quad =169\pi\\\\\\.\quad =\large\boxed{530.66}$

3 0

3 years ago

Estimate 137,638 plus 52,091

seraphim [82]

First round
137,638=100,000
52,091=50,000
Then add to get the estamate
100,000
+
50,000
150,000
Then to get the real answer add
1
137,638
+
52091
189,729

8 0

2 years ago

Read 2 more answers

William earns $2,400.00 each month. His current monthly expenses are $1,910.00. This month, he plans to pay a little extra to hi

Marianna [84]

Answer:

b

Step-by-step explanation:

2400-1910=490

5 0

3 years ago