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blagie [28]
3 years ago
13

For a confidence level of 88%, find the critical value for a normally distributed variable. The sample mean is normally distribu

ted if the population standard deviation is known.
Mathematics
1 answer:
Elanso [62]3 years ago
8 0

Answer:

z = ±  0.772193214

Step-by-step explanation:

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the school stage is 8 3/4 feet wide and each chair is 1 5/12 feet wide. how many chairs will fit across the stage?
Sedaia [141]

Answer:

6 whole chairs

Step-by-step explanation:

(8 + (3/4)) / (1 + (5/12))

8.75 / 1.42

6.18 chairs

6 0
3 years ago
What is the solution to the equation 3x - 8 = 22? x = 10 x = 8 x = 6 x = 0 please i'll give out 20 points i need it now
Sedaia [141]

Answer:

x = 10

Step-by-step explanation:

Step 1: Write equation

3x - 8 = 22

Step 2: Add 8 to both sides

3x = 30

Step 3: Divide both sides by 3

x = 10

5 0
2 years ago
The sale tax rate is 7.5%. What is the tax on a $14.80 purchase.
SSSSS [86.1K]
Okay! Assuming this only wants the tax that will be added to the total, multiply the decimal percent by the cost of the item.

7.5% = .075

14.80 * .075 = 1.11

1.11 of tax will be added onto the total cost.

The total cost would be 15.91, which you can get from adding 14.80 to 1.11 or by doing 14.80 * 1.075. Regardless, the answer to this question is 1.11.
4 0
2 years ago
(4x + 8x - 5) + (3x2 + 6x - 7)
ch4aika [34]

Answer:

7x^2 + 14x - 12

Step-by-step explanation:

Add like terms:

(4x + 8x - 5) + (3x2 + 6x - 7) becomes:

  4x^2 + 8x - 5               or (grouping like terms in columns):

+ 3x^2 + 6x - 7

---------------------

 7x^2 + 14x - 12

5 0
3 years ago
Plz answe it is worth 10 points thx
vova2212 [387]

Answer:

C

Step-by-step explanation:

4 0
3 years ago
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