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2 years ago

Please help me..asap

Mathematics

1 answer:

Ivenika [448]2 years ago

6 0

Answer:

the first one obviously isnt random
the second one is selective then random
the third one is also selective
the fourth one is random

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Truck tire life is normally distributed with a mean of 60,000 miles and a standard deviation of 4,000 miles. what is the probabi

olasank [31]

To solve for the P(54,000≤x≤66000) we proceed as follows:
z-score=(x-μ)/σ
μ-60000
σ-4000
thus:
when x=66,000
z-score=(66000-60000)/4000=1.5
P(z≤1.5)=0.9332
when x=54000
z=(54000-60000)/4000
z=-1.5
P(z≤-1.5)=0.0668
thus
P(54,000≤x≤66000)
=P(z≤1.5)-P(z≤-1.5)
=0.9332-0.0668
=0.8664

Answer: 0.8664

8 0

3 years ago

Jenny's bakery sells carrot muffins at 2 dollars each. The electricity to run the over is over 120 dollars per day and the cost

g100num [7]

Answer:

200 muffins

Step-by-step explanation:

The selling price of each muffin = $2

The cost price of each muffin = $1.40

The price of electricity = $120

If the number of muffins that Jenny sells in a day is x, then, Jenny's total cost in a day is:

120 + (1.4 * x) = 120 + 1.4x

and the total sales earnings in a day for x muffins will be:

2 * x = 2x

To break even, the total costs in a day must equal to the total earnings. That is;

$2x = 120 + 1.4x$

Solving this:

$2x - 1.4x = 120\\\\\\0.6x = 120\\\\\\x = 120/0.6\\\\\\x = 200$

She must sell 200 muffins in a day to break even.

7 0

3 years ago

13/15 is equal to or less than or greater than 0.5

Bess [88]

Answer:

Greater Than

Step-by-step explanation:

Half of 15 is 7 1/2 and 13 is greater than 7 1/2

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1 year ago

Simplify the expression

natka813 [3]

Answer:

its B bro come on

Step-by-step explanation:

ok good

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3 years ago

How can you compare -1 and 0?

Solnce55 [7]

Answer:

-1 < 0

Step-by-step explanation:

0 is nothing and -1 is less than nothing

5 0

3 years ago