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pashok25 [27]
3 years ago
15

Kathy can key in 6 letters every 3 seconds on her phone. How many letters can she type in a minute and a half?

Mathematics
2 answers:
garri49 [273]3 years ago
7 0

Answer:

She can type 180 letters in a minute and a half.

Step-by-step explanation:

6 letters per 3 seconds, so we need to find how many letters per 90 seconds, or minute and a half.

6/3 = x/90

Where x represents how many letters she can type in 90 seconds.

2 = x/90

Multiply by 90.

x = 180.

CaHeK987 [17]3 years ago
3 0
Kathy can type 180 letters
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Recently, TWA reported an on-time arrival rate of 78.4%. Assume that a later random sample of 750 flights results in 630 that ar
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Step-by-step explanation:

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Where P = 0.84 and n = 750

sd =√[{0.84( 1- 0.84)/750]}

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Can someone please help me out with this? I will give brainliest if it lets me!
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