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GrogVix [38]
3 years ago
13

I will mark Brainlyst

Mathematics
1 answer:
suter [353]3 years ago
8 0

Answer:

A because of its larger range

Step-by-step explanation:

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A product developer is interested in reducing the drying time of a primer paint. Two formulations of the paint are tested: Formu
nevsk [136]

Answer:

the answer is in the explanation

Step-by-step explanation:

we are given

          sample size n_{1} = n_{2} = 10  for each formulation

          mean  \bar{x} _{1} (formulation 1) = 121

          mean \bar{x} _{2}  (formulation 2) = 112

         s (standard deviation )  =  8 mins for  each case

        null hypothesis        H_{0}        μ2 = μ1        (both have average same time)

 alternative hypothesis   H_{1}         μ2 < μ1

          under H_{0}  the test statistics is

                                t = \frac{\bar{x}_{2} - \bar{x}_{1} }{s\sqrt{\frac{1}{n_{1} }+ \frac{1}{n_{1}} } }

                               t = \frac{112 - 121 }{8\sqrt{\frac{1}{10 }+ \frac{1}{10} } }

                                t = -2.5

                        ItI = 2.5

            The P-value at  ItI = 2.5       at \alpha = 0.05    μ = 0.010699

check the remaining solution and diagram in the attached image

3 0
3 years ago
Paul, colin and brian are waiters.One night the restaurant earns tips totalling £78.40.
riadik2000 [5.3K]

Answer:

£39.20

Step-by-step explanation:

2+1+5=8

£78.40/8 = 9.8

9.8*5= 49

49-9.8= 39.2

5 0
3 years ago
I will give u 5 stars for you answer and ill mark u brainilest if u tell me how to do it.
kolezko [41]

Answer:

Erin ran 12.5 miles

Luis ran 7.5

In all they ran 20 miles.

Step-by-step explanation:

Erin: 5 x 3.5 = ?

Luis: 3 x 2.5 = ?

----------------------------

5 x 2.5 = 12.5 . Erin ran 12.5 miles

3 x 2.5 = 7.5 .  Luis ran 7.5 miles

7.5 + 12.5 = 20 miles

They ran 20 miles all together.

Hope this helps!

3 0
3 years ago
Does anyone know the answer?
motikmotik

Answer:

We conclude that the area of the right triangle is:

A\:=p^2-2p-3

Hence, option A is correct.          

Step-by-step explanation:

From the given right-angled triangle,

  • Base = p+1
  • Perpendicular = 2p-6

Using the formula to determine the area of the right-angled triangle

Area of the right triangle A = 1/2 × Base × Perpendicular

                                            =\frac{1}{2}\left(p+1\right)\left(2p-6\right)

Factor 2p-6: 2(p-3)

                                             =\frac{\left(p+1\right)\times \:2\left(p-3\right)}{2}  

Divide the number: 2/2 = 1

                                              =\left(p+1\right)\left(p-3\right)

\mathrm{Apply\:FOIL\:method}:\quad \left(a+b\right)\left(c+d\right)=ac+ad+bc+bd

                                               =pp+p\left(-3\right)+1\cdot \:p+1\cdot \left(-3\right)

                                               =pp-3p+1\cdot \:p-1\cdot \:3

                                                =p^2-2p-3

Therefore, we conclude that the area of the right triangle is:

A\:=p^2-2p-3

Hence, option A is correct.                                        

3 0
3 years ago
A bullet train can travel at 170 miles per hour.Will a graph representing distance in mile compared to time in hours show a prop
Eddi Din [679]
Yes the graph will show a proportional relationship
6 0
3 years ago
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