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2 years ago

15

Please help me with this answer (Links and spam answers will be reported)

1 answer:

Angelina_Jolie [31]2 years ago

5 0

Answer:

area if circle =πr²=π6²=36πmm²

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A new catalyst is being investigated for use in the production of a plastic chemical. Ten batches of the chemical are produced.

zzz [600]

Answer:

$CI=(66.54,78.46)$

Step-by-step explanation:

Given : A new catalyst is being investigated for use in the production of a plastic chemical. Ten batches of the chemical are produced. The mean yield of the 10 batches is 72.5% and the standard deviation is 5.8%. Assume the yields are independent and approximately normally distributed.

To find : A 99% confidence interval for the mean yield when the new catalyst is used ?

Solution :

Let X be the yield of the batches.

We have given, n=10 , $\bar{X}=72.5\%$ , s=5.8%

Since the size of the sample is small.

We will use the student's t statistic to construct a 995 confidence interval.

$\bar X\pm t_{n-1,\frac{\alpha}{2}}\frac{s}{\sqrt n}$

From the t-table with 9 degree of freedom for $\frac{\alpha}{2}=0.005$

$t_{n-1,\frac{\alpha}{2}}=t_{9,0.005}$

$t_{n-1,\frac{\alpha}{2}}=3.250$

The 99% confidence interval is given by,

$CI=72.5 \pm 3.25\frac{5.8}{\sqrt{10}}$

$CI=72.5 \pm 5.96$

$CI=(72.5+5.96),(72.5-5.96)$

$CI=(66.54,78.46)$

8 0

2 years ago

Camille is attending a fundraiser. She pays for her admission and buys raffle tickets for $5 each. If she buys 10 raffle tickets

Anna007 [38]

To spend a total of $135, Camille would have bought 27 tickets at $5 each.

7 0

3 years ago

Read 2 more answers

We can calculate the depth ddd of snow, in centimeters, that accumulates in Harper's yard during the first hhh hours of a snowst

inna [77]

Answer:

0.2 hours

Step-by-step explanation:

The depth, d of snow (in cm) that accumulates in Harper's yard during the first h hours of a snowstorm can be calculated using the equation:

d=5h

When d=1cm, we want to determine the value of h.

1=5h

h=1/5=0.2

Therefore, it takes 0.2 hours for 1 centimeter of snow to accumulate in Harper's yard.

3 0

2 years ago

Renee hiked for 3 3/4 miles. After resting, Renee hiked back along the same route for 2 1/4 miles. How many more miles does Rene

Shtirlitz [24]

Answer:

1 1/2 miles

Step-by-step explanation:

3 3/4 - 2 1/4..

3/4 - 1/4 = 2/4=1/2

3-2= 1

1+1/2=1 1/2 miles

3 0

2 years ago

Mai has a piece of cloth that is 8.35 meters long how many 15 centimeters pieces can she cut from the cloth? how much will be le

Helen [10]

$8.35m \times 100 = 835cm \\ 835 \div 15 = 55 \frac{10}{15}$
She can cut 55 pieces from the cloth, and 10cm will be left over.

Hope this helps. - M

7 0

3 years ago