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iren [92.7K]
3 years ago
6

HELP WHOEVER ANSWERS CORRECTLY WILL BE BRAINLIEST!!!!

Mathematics
1 answer:
Lorico [155]3 years ago
4 0
Find the surface area:

7.25 x 9.5 x 2 = 137.75 gets the surface area of the two rectangle sides.

To get the bottom rectangle, do 8 x 9.5 = 76

To find the two triangles, do 6 x 8 x 0.5 x 2 = 48

Now add them all together: 137.75+76+48=261.75

So, the answer is 261.75 square feet of material.
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A plumber's daily earnings have a mean of $145 per day with a standard deviation of $16.50.
avanturin [10]

Step-by-step explanation:

The plumber's daily earnings have a mean of $145 per day with a standard deviation of

$16.50.

We want to find the probability that the plumber earns between $135 and

$175 on a given day, if the daily earnings follow a normal distribution.

That is we want to find P(135 <X<175).

Let us convert to z-scores using

z =  \frac{x -  \mu}{ \sigma}

This means that:

P(135  \: <  \: X  \: <  \: 175) = P( \frac{135 - 145}{16.5}  \: <  \:  z \:  <  \frac{175 - 145}{ 16.5} )

We simplify to get:

P(135  \: <  \: X  \: <  \: 175) = P(  - 0.61\: <  \:  z \:  <  1.82 )

From the standard n normal distribution table,

P(z<1.82)=0.9656

P(z<-0.61)=0.2709

To find the area between the two z-scores, we subtract to obtain:

P(-0.61<z<1.82)=0.9656-0.2709=0.6947

This means that:

P(135  \: <  \: X  \: <  \: 175) =0.69

The correct choice is C.

7 0
3 years ago
Solve for y. ln(y-1)-ln2=x+ln x
alexandr402 [8]
ln(y - 1) - ln(2) = x + ln(x)
e^{ln(y - 1) - ln(2)} = e^{x + ln(x)}
\frac{e^{ln(y - 1)}}{e^{ln(2)}} = e^{x} * e^{ln(x)}
\frac{y - 1}{2} = e^{x} * x
\frac{1}{2}y - \frac{1}{2} = xe^{x}
2(\frac{1}{2}y - \frac{1}{2}) = 2xe^{x}
y - 1 = 2xe^{x}
y = 2xe^{x} + 1
3 0
3 years ago
Divide 3 by 8, then multiply z by the result
Sonbull [250]

3÷ 8 ·z

3/8 ·z

3/8z

I think i'm just supposed to simplifiy it??

8 0
3 years ago
There is an error in the diagram. Choose the statement that best describes what is wrong.
marishachu [46]

Answer:

the first one is right and other are wrong

4 0
3 years ago
A right triangular prism has a height of 26 cm and base edges of 10 cm, 24 cm, and 26 cm. What is the lateral area of the prism?
horrorfan [7]
The lateral area is 1560 cm².

The lateral area is the area of the lateral faces (the faces that are not bases).  The dimensions of these are:
24 by 26
10 by 26
26 by 26

These are all rectangles.  The area of each rectangle is given by length * width:
24*26 = 624
10*26 = 260
26*26 =676

624+260+676=1560
3 0
3 years ago
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