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Juli2301 [7.4K]
3 years ago
10

90 centimeters greater than 9 millimeters

Mathematics
1 answer:
Stels [109]3 years ago
3 0

Answer:

909 mm

Step-by-step explanation:

There are 10 mm in a cm

90 x 10 = 900

900 + 9 = 909 mm

(Unless you're asking if this is true/false; if so, it is true)

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Step-by-step explanation:

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Which is the net of this solid? A pentagonal pyramid is shown. A net is shown with a square in the middle and 4 identical triang
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Answer: Choice B

A net is shown with a pentagon in the middle and 5 identical triangles on the 5 sides of the pentagon

The pentagon forms the base of the pentagonal pyramid. Each lateral side is a triangle that meets at the very top of the pyramid. The base stays on the floor while the sides are folded up.

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There are other possible net configurations to form a pentagonal pyramid, but the other answer choices do not make a pentagonal pyramid.

  • Choice A produces a square pyramid.
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A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company prod
tekilochka [14]

Answer:

C) 515 hours.

D) 500 hours

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1. Sample 2 mean = x2`= ∑x2/n2= 2060/4= 515 hours

Sample Service Life (hours)

1                2              3

495      525            470

500         515           480

505        505            460

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<u>∑2000     2060         1880</u>

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x3`= ∑x3/n3= 1880/4=  470 hours

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In this question the limits are determined by using  μ ± σ .

3. Upper control limit = UCL = 520 hours

Lower Control Limit= LCL = 480 Hours

Sample 1 mean = x1`= ∑x1/n1= 2000/4= 500 hours

Sample 2 mean = x2`= ∑x2/n2= 2060/4= 515 hours

Sample 3 mean = x3`= ∑x3/n3= 1880/4=  470 hours

This means that the sample mean must lie within the range 480-520 hours but sample 3 has a mean of 470 which is out of the given limit.

We see that the sample 3 mean is lower than the LCL. The other  two means are within the given UCL and LCL.

This can be shown by the diagram.

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