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3 years ago

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The talk-time battery life of a group of cell phone is normally distributed with a mean of 5 hours and a standard deviation of 1

5 minutes. A) What percent of the phones have a battery life of at least 4 hours and 45 minutes?

1 answer:

kiruha [24]3 years ago

6 0

The correct answer is 84%

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The width of a rectangle is 6n - 2.5 feet and the length is 2.5 + 8 feet. Find the perimeter of the rectangle.

ludmilkaskok [199]

I was thinking the measurement for ;length should be 2.5n + 8 feet since width is 6n -2.5 feet , but you gave 2.5+ 8 feet, so i will solve it in both ways

Answer: Perimeter = 5 + 12n + 11 feet ; Perimeter = 17n+ 11 feet

Step-by-step explanation:

Using Length = 2.5+ 8 feet,

Perimeter of a rectangle is calculated as 2( l+ b)

Given that width=6n - 2.5 feet

length =2.5 + 8 feet

Perimeter =2( l+ b)= 2L + 2B

Perimeter= 2(2.5 + 8feet ) + 2( 6n - 2.5 feet)

Perimeter = 5 + 16feet + 12n - 5feet

Perimeter = 5 + 12n + 11 feet

Using Length = 2.5n+ 8 feet,

Perimeter of a rectangle is calculated as 2( l+ b)

Given that width=6n - 2.5 feet

length =2.5n+ 8 feet

Perimeter =2( l+ b)= 2L + 2B

Perimeter= 2(2.5n + 8feet ) + 2( 6n - 2.5 feet)

Perimeter = 5n + 16feet + 12n - 5feet

Perimeter = 5n + 12n + 11 feet

Perimeter = 17n+ 11 feet

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3 years ago

Find the gradient of the line segment between points (8,6) and (10,14)

fenix001 [56]

Answer: 4

Step-by-step explanation:

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2 years ago

Can a trapezoid be a hexagon

NNADVOKAT [17]

Answer:

No. A trapezoid is a shape with four sides, while a hexagon is a shape with six sides.

Step-by-step explanation:

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3 years ago

Read 2 more answers

Could someone explain how you would solve this? I really don't understand it.

nlexa [21]

Because of rules of geometry we know that a+b=180 degrees so we can add the equations together and set that equal to 180 and solve
6x-48+4x+38=180
subtract 38 from both sides and add 48 to both sides
then add like terms
10x=170
and divide by 10 to get
x=17

7 0

3 years ago

Se van a transportar sacos que contienen 50 kg de azúcar cada uno, el camión que se va utilizar para el transporte de los sacos

LekaFEV [45]

Function: $50x=8000$ (maximum number of packages: 160)

Step-by-step explanation:

In this problem, we have:

$C=8 ton = 8000 kg$ is the capacity of the truck (the amount of mass that can be stored in the truck)

p = 50 kg is the mass of each package that need to be stored in the truck

We can find the number of packages that can be transported as follows: calling this number x, the total mass of x packages is

$p\cdot x$

This amount should be at most equal to the capacity of the truck, therefore:

$px=c$

And substituting the numbers,

$50x=8000$

And solving the equation, we can found the number of packages that can fit into the truck:

$x=\frac{8000}{50}=160$

Learn more about equations:

brainly.com/question/11306893

brainly.com/question/10387593

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3 years ago