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sweet-ann [11.9K]
2 years ago
9

A school psychologist at a large high school took a random sample of 16 students and asked how much sleep they get on a typical

weekend night. The sample data were roughly symmetric with a mean of 8.75 hours and a standard deviation of 1.5 hours
Mathematics
1 answer:
puteri [66]2 years ago
7 0

Answer:

8.75 +/- 0.657

Step-by-step explanation:

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In the triangle shown, B=60 and AC=9√3 how long is AB answer exactly, use a radical if needed
zavuch27 [327]

Length of AB is 18

Step-by-step explanation:

  • Step 1: Find length of AB when AC = 9√3 and ∠B = 60°. Use trigonometric ratio sine.

sin 60 = opposite side/hypotenuse = 9√3/x

x = 9√3/sin 60

   = 9√3/√3/2 = 9√3 × 2/√3 (∵ a ÷ b = a×1/b)

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3 years ago
2. How many terms are there in the expression: 3a + 6
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Step-by-step explanation: That expression is a binomial in any case the terms in a polynomial are separated by a plus or minus sign (+,-) so you can determine the number of terms by counting how many number or variable are being separated (ex: 3a+a-1 would have 3 terms and be a trinomial)

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Carmen cut a 12 meter piece of cloth into three pieces. The first two pieces were each
astraxan [27]

Answer:

6 Meters long

Step-by-step explanation:

3+3=6

12-6=6

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3 years ago
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evablogger [386]
4.902 written in expanded form is A
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Answer:

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Step-by-step explanation:

i hope this helps have a good day

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