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2 years ago

13

The weights of 1,000 men in a certain town follow a normal distribution with a mean of 150 pounds and a standard deviation of 15

pounds.

1 answer:

galina1969 [7]2 years ago

7 0

Im not really sure but 45 sir :)

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(5y + 2) + 14x = 5y + (2 + 14x)

Ann [662]

6. (5y+2)+14x=5y+(2+14x) (1point) A.associative property of addition B.associative property of multiplication C.commutative property of addition D.commutative property of multiplication 7. (m*n)*p=m*(n*p) (1 point) A. commutative property of addition B.commutative property of multiplication C.associative property of addition D. associative property of multiplication

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1 year ago

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Emily wants to hang a painting in a gallery. The painting and frame must have an area of 31 square feet. The painting is 5 feet

seropon [69]

Area=legnth times width=31
the frame must go around the frame with equal legnth, x
so
the total area (meaning the frame +picture) is 5+x by 6+x
31=(5+x)(6+x)
expand
31=30+11x+x^2
minus 31 both sides
0=-1+11x+x^2
x^2+11x-1=0

answer is third one

6 0

1 year ago

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What is the expected value of an original Investment of $3,000 that has a 10% chance of ending up with a value of $2,000, an 80%

Sloan [31]

Answer:

Option C.

Step-by-step explanation:

The original value of Investment = $3,000

It has a 10% chance of ending up with a value of $2,000.

Chances of loss of $1000 = 0.1

It has a 80% chance of ending up with a value of $3,500.

Chances of profit of $500 = 0.8

It has a 10% chance of ending up with a value of $4,000.

Chances of profit of $1000 = 0.1

Expected change in the value of investment is

$Change=(-\$1000)(0.1)+(\$500)(0.8)+(\$1000)(0.1)$

$Change=-\$100+\$400+\$100$

$Change=\$400$

The expected change in the value of the investment is $400.

The expected value of an original Investment of $3,000 is

$\$3000+\$400=\$3400$

Therefore, the correct option is C.

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1 year ago

The cylindrical water tank on a semitrailer has a length of 20 feet. The volume of the tank is equal to the product of pi, the s

Bogdan [553]

Answer:

V = 20πr²

Step-by-step explanation:

In this question, volume of the cylindrical tank has been defined as,

Volume V of the tank = Product of π, the square of the radius of the tank 'r' and the length of the tank 'h'.

Therefore, formula to calculate the formula will be,

V = πr²h

If the length of the cylindrical trailer is,

h = 20 feet

Then the volume of the trailer will be,

V = πr²(20)

V = 20πr²

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2 years ago

A bag has 10 marbles and 4 are black. Joseph picks 2 marbles without replacing the first. What is the probability that both are

Crank

If there are 10 marbles in total then the probability is 2/10

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1 year ago