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djverab [1.8K]
3 years ago
8

4. Kevin is using his scanner to make a smaller version of the school logo to put in the yearbook.

Mathematics
1 answer:
vredina [299]3 years ago
3 0

Answer:

scale factor 2.5

Step-by-step explanation:

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An electrical engineer wishes to compare the mean lifetimes of two types of transistors in an application involving high-tempera
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Answer:

(115.2642, 222.7358).

Step-by-step explanation:

Given data:

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type B: n_2=180, xbar_2=1658, s_2=225

n_1 = sample size 1, n_2= sample size 2

xbar_1, xbar_2 are mean life of sample 1 and 2 respectively. Similarly, s_1 and s_2 are standard deviation of 1,2.

a=0.05, |Z(0.025)|=1.96 (from the  standard normal table)

So 95% CI is

(xbar_1 -xbar_2) ± Z×√[s1^2/n1 + s2^2/n2]

=(1827-1658) ± 1.96×sqrt(168^2/60 + 225^2/180)

= (115.2642, 222.7358).

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3 years ago
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ArbitrLikvidat [17]

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Step-by-step explanation:

The slope is equal to 2 by it being in the slope place of y=mx+b

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3 years ago
Lexy and Lonnel applied to the same university. They looked up the average SAT score of students admitted to that university. Le
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  |30 -(-270)|

or

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Step-by-step explanation:

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