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2 years ago

Find the difference of (t-8)-(t-15)

Mathematics

1 answer:

Vsevolod [243]2 years ago

5 0

I think u should try (t-23) because -8 minus - 15 is = to 23 so yeah add the t in front of it

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AARP reported on a study conducted to learn how long it takes individuals to prepare their federal income tax return (AARP Bulle

Crank

Answer:

Confidence interval: (30.1,36.9)

Step-by-step explanation:

We are given the following data set:

35.3,30.5,37.4,26.5,13.0,49.9,28.8,44.0,61.6,0.5,40.5,34.9,47.9,36.6,24.1,39.8,47.8,18.5,36.6,39.2,14.5,37.3,40.5,49.3,45.5,28.3,19.5,5.6,52.6,41.4,45.3,39.0,33.7,29.4,14.5,40.1,33.7,36.9,5.6,33.7

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{1339.9}{40} = 33.5$

$S.D = 11$ (given)

n = 40

Confidence interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$33.5 \pm 1.96(\frac{11}{\sqrt{40}} ) = 6.34 \pm 3.4 = (30.1,36.9)$

6 0

2 years ago

The sum of 7/8 and 4/9 is closer to 0,1,2,or 3?

tresset_1 [31]

2 because you make them with the same denominators that both go into each other EX: 8x9=72 7/8 now equals 63/72 and 4/9 now equals 28/72 now add them together 63/72 + 28/72= 91/72= 1 19/72

6 0

2 years ago

Let g(x)= -x^2+4x+4. Find g(p). g(p)=_____

mixer [17]

Answer:

g(p)= -p^2+4p+4

Step-by-step explanation:

g(x)= -x^2+4x+4

Replace x with p

g(p)= -p^2+4p+4

8 0

2 years ago

Sarah needs 10 feet of fabric for a project she is working on, but the store only sells the fabric in meters. One meter of fabri

Aleks [24]

<h2>Hello!</h2>

The answer is:

The fabric will cost $4.58

D.$4.58

Since it's a conversion exercise, we need to pay special attention to the conversion procedure.

From the statement we know that:

$1ft=0.305m$

So, if she needs 10 feet of fabric, we need to convert it to meters, and then, calculate its cost.

We have that:

$10*1ft=10*0.305m\\\\10ft=3.05m$

Now, we have that each meter of fabric cost $1.50, so, 3.05m of fabric will cost:

$\frac{1m}{1.50(dollars)}=\frac{3.05m}{cost}\\\\cost=\frac{3.05m*1.50(dollars)}{1m}=4.575(dollars)=4.58(dollars)$

Hence, we have that the cost of the fabric will be $4.58.

The correct option is: D.$4.58

Have a nice day!

6 0

2 years ago

Jose runs 6 miles in 55 minutes. at the same rate, how many miles would he run in 44 minutes

Vikki [24]

Answer:

4.8 miles

Step-by-step explanation:

have a good day!

6 0

2 years ago

Read 2 more answers