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Mariana [72]
3 years ago
11

6. The expected life of a calculator varies inversely with the amount of times a student

Mathematics
1 answer:
loris [4]3 years ago
6 0

9514 1404 393

Answer:

  250 days

Step-by-step explanation:

If the number of drops increases by a factor of 20/8, the expected life will decrease by the inverse of that factor: 8/20.

The expected life is (8/20)(625 days) = 250 days.

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Angle D has what measurement according to the protractor?
Aliun [14]

Answer:

B. 90^o

Step-by-step explanation:

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Step-by-step explanation:

3 0
3 years ago
Answer choices:
vova2212 [387]
A and T are points. On their own, they cannot define a line. So we can rule out choice A

WCR and TRA are angles. For any triple the points do not fall on the same straight line. So we cannot define any lines here. This crosses off choice B

Choice C is the answer because WC does define a line. We only need two points to form a line. Similarly CR does the same job. We draw a line marker with two arrows at each end to be placed over the letters to indicate "line". 

Choice D is similar to choice D; however, it is not the answer because WT is the same line as WC. In other words, WC = WT. We haven't named a new line at all. We're simply repeating ourselves. 
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